Are you a proud owner of a 700r4 transmission? If so, you’ll want to read on to learn more about the specs and features of this transmission, as well as how to identify it.
Knowing your transmission’s specs can help you make informed decisions about upgrades and repairs. Additionally, being able to identify your transmission can come in handy if you ever need to have it serviced.
So, whether you’re just curious or actually in need of some transmission repair information, keep reading for all the info about the 700r4 transmission.
700r4 Transmission Specifications
| Description | Spec |
|---|---|
| Name | 700r4 |
| Type | 4 Speed Automatic |
| Applications | GM Cars - GMC, Chevy/Chevrolet, Buick 1982-1990 Blazer, Suburban, Camaro, Corvette, Impala, Oldsmobile 350 and more |
| Gears | 3 + 1 Overdrive 30% |
| Weight | 170 lbs dry~ |
| Length | 23.5" |
| Gear Ratios | 1: 3.059 2: 1.625 3: 1.00 4: 0.696 R: 2.294 |
| Case Material | Aluminum |
| Input Spline | -1984 27 splines 1984- 30 splines |
| Name Before | -1982 TH350 |
| Name After | 1990- 4L60 |
| Fluid Capacity | 11 Quarts |
| Fluid Type | DEXRON VI |
| Max Torque | 350nm +/- |
| Image |  |
| Gasket/Bolt Pattern | 16 bolt  |
What is a 700r4 Transmission?
The 700R4 transmission is a 4-speed automatic transmission that was introduced by General Motors in 1982. It is based on the TH350 3-speed automatic transmission, and features an overdrive fourth gear that provides a 30 percent fuel economy improvement over the TH350.
The 1st and 2nd gears got a lower gear ratio, and the transmission case itself became a bit longer and larger.
You usually find the 700r4 transmission in GM cars like the Chevy Blazer, Suburban, Camaro, Corvette, Impala, and even in Oldsmobile Cars and many more. If we mentioned all car models this transmission was installed in, the list would be very long.
A lot of people like the 700r4 because of its excellent durability. Due to its popularity, it is also quite effortless to find replacement parts for this transmission.
The 700r4 transmission is not electronically controlled; it uses hydraulic pressure with a TV cable, which acts as a throttle position sensor to control the gear shifting. In 1991, the 700r4 transmission was replaced by the popular 4L60 transmission.
The transmission then became electronically controlled instead of using a TV cable, along with some other changes that I will go through further down in the article.
In conclusion, the 700r4 transmission is a 4-geared hydraulic automatic transmission with the 4th gear, an overdrive gear (30% increase). The transmission was made between 1982–1992. It had a case length of 23.5″~ and a weight of 170 lbs~ without fluid inside it. The transmission case has 16 bolts and a transfer case of aluminum.
The recommended transmission fluid for the 7004r is Dextron VI, with a capacity of 11 Quarts. The transmission is pretty reliable and can handle torque up to around 350nm~; remember that these are only the reported numbers, and it can be higher or lower depending on the age and maintenance.
RELATED: 4L60E vs 4L80E Differences: Swap & Information
K-Case Differences
The K-case 700r4 transmission was introduced due to the “K” stamp on the transmission case. The K-case 700r4 transmission was designed to work with heavy-duty 4×4 trucks, and it is known as one of the best offroad transmissions. The K-case is more robust and has a thicker transfer case.
How To Identify a 700r4 Transmission?
Most GM automatic transmissions look almost identical. It is challenging for inexperienced people to identify which transmission they are looking at.
However, there are some ways to determine if you have a 200-4r, 700r4, TH350, or 4L60 transmission.
1. Transfer Case Gasket Bolt Pattern
The easiest way to identify if you have a 700r4 is to raise your car and check the bolts around the transfer case.
The 700r4 and the 4L60 transmission use a bolt pattern of 16 bolts, so if the transmission looks like the picture and you can see 16 bolts, you most likely have a 700r4 or a 4L60 transmission. So how can you know which one of these you have?
Well, the 700r4 uses a TV cable as the speedometer, and the 4L60 is an electronically controlled transmission, so if you see wires coming to the transmission on the rear of the transmission on the passenger side, you have a 4L60.
2. Identification Tag
The safest way to determine if you have a 700r4 transmission is to look at the identification tag on the transmission.
You will find it on the rear side of the transmission on the passenger side. It can be pretty tough to see on older cars, so you may have to clean up your transmission to find it.
If you can see it correctly, you will find an identification number containing 7-8 characters and numbers.
The 1st number is the year model of the transmission. For example, if the number is 0, the transmission is from 1990. But it’s not that easy, because the transmission was made in the 1980s also. You will have to check the next few letters, as well.
| 2 letters 80's | 3 letters 80's | 3 letters 90's | ||
|---|---|---|---|---|
| 9 = 1982 | 6 = 1986 | 0 = 1990 | ||
| 3 = 1983 | 7 = 1987 | 1 = 1991 | ||
| 4 = 1984 | 8 = 1988 | 2 = 1992 | ||
| 5 = 1985 | 9 = 1999 | 3 = 1993 |
- The next 2 or 3 letters identify the model of the transmission. These numbers tell us the application, engine size, wiring type, and solenoids.
- If you find two letters, the transmission was made between 1982-1985.
- If you find three letters, the transmission was made between 1986-1993.
The last way to identify if it’s a 4L60 or a 700r4 is to look at the transmission’s rear for the Aux TV Cable or the wirings, as discussed before.
- Wirings = 4L60
- Aux TV Cable = 700r4
The last numbers and letters indicate the manufacturer, rebuild, manufacturing, and serial number.
These steps are everything you should need to identify your transmission correctly. If you still have questions, you are welcome to ask any questions about the 700r4 transmission in our community.
700r4 Troubleshooting Guide
Even though the 700r4 transmission is durable and reliable, they do sometimes fail. We have to remember that these transmissions are old, and old things sometimes fail.
Here I will give some common symptoms of a bad 700r4 transmission, and add a short line underneath it to explain where you should start looking for the issue.
1. Torque Converter won’t lock and slipping
When your 700r4 transmission is slipping or won’t lock, it’s most likely a problem with the torque converter inside the transmission. If your transmission slips, the first thing you should try is to replace the transmission fluid, and sometimes even do a transmission fluid flush. You should do this before going into any more specific repairs
700r4 Transmission Fluid Level Checking
Let the transmission fluid heat up to working temperature and let your car idle in Park while checking the dipstick. If the fluid level is low, try to fill it up to see if it solves the problem.
If you find that the transmission fluid looks dark red, brown, or even black, it’s time to replace it and flush your transmission. Even if the transmission fluid seems good, if the converter is slipping, I still recommend that you replace the fluid and do a transmission flush as a matter of course.
RELATED: Transmission Fluid Color Chart (5 Different Colors)
There could be a problem with the converter itself, which may need to get replaced. Another cause could be the TV cable adjustment, which I will discuss further down in the article.
2. Revs up but won’t move
If your car revs up but will barely move, you should begin by checking the transmission fluid, as discussed before. Check the level and the color of the transmission fluid.
- Red = Okay
- Brown = Worn out
- Black = Burned
If the fluid seems okay, it’s time to check your TV cable’s adjustment between the transmission and the throttle body. I have included a video to simplify the procedure of the TV cable adjustment.
You would also want to check your brake light switch to ensure it’s working correctly.
3. The speedometer is not working properly
If your speedometer is not working, there are two different variants you need to know about before starting the troubleshooting. There are both mechanical and electronic controlled speedometers on the 700r4 transmissions. You must first check if you have a mechanical or electronic speedometer.
Raise the car and look at the transmission’s rear. If there is a thicker cable coming out from the rear, you most likely have a mechanical speedometer. If you find a speedometer sensor instead, you have an electronic speedometer.
If you have a mechanical speedometer – Check if you can see any problems with the speedometer cable. Replace it if you can see any signs of wear or other damage. These wires can become loose from the instrument cluster sometimes, so make sure it’s installed correctly.
If you have an electronic speedometer – Check the wirings between the cluster/control unit and the transmission and make sure there is no corrosion inside the connector. If the wires are okay, it’s time to replace the sensor on the transmission. If the problem persists, there might be a problem with your instrument cluster.
4. Vibrations during acceleration
If you feel vibrations while accelerating your car, there is most likely a problem with the driveshafts, prop shaft, or torque converter. If you feel vibrations all the time and not only during acceleration, you may have unbalanced tires.
RELATED: Why is My Car Shaking? (8 Common Causes & How to Fix it)
5. Not shifting properly
If your transmission is not shifting properly, you need to check the TV cable adjustment, as discussed before. Also, check the transmission fluid level and replace it if it’s worn.
Common 700r4 transmission Problems
There are some common problems that you should always check first when you are troubleshooting your 700r4 transmission. These issues include:
1. The Brake Light Switch
There is a switch on the brake pedal, and you should check to make sure it is functioning properly. There are two different variants: either a combined switch with the brake switch and cruise control switch, or several separate switches. Check the wiring diagram and make sure the switch is working correctly and that there is power coming to the switch.
2. Worn-out TV cable/adjustment
A worn-out TV cable or a faulty adjustment is another common issue on the 700r4 transmission. Make sure to adjust the TV cable with the video’s help. If you can see any signs of wear or damage on the TV cable, replace it!
3. Low fluid level/burned fluid
The 700r4 transmissions sometimes leak, which can cause low transmission fluid levels, so you should always check the level first to ensure it’s fine. Sometimes people let their transmission go many years without a transmission fluid change, and this lack of maintenance can cause damage to the transmission. Check the fluid level. Replace and flush the transmission fluid if it looks dirty.
4. Faulty Torque Converter
Unfortunately, the torque converter can sometimes fail on the 700r4 transmission. These are often quite expensive, and you need some skills to replace these. If you have done everything above and the transmission is still slipping, you might have to replace it. There are some videos on Youtube on how to replace the 700r4 converter.
700r4 Transmissions for Sale
If you have found a severe problem with your 700r4 transmission, you might want to replace the whole transmission. Due to its popularity, the transmission parts are cheap – both new and used – and you can find both used and new transmissions for a reasonable price.
However, if you are going to replace parts for your transmission, I always recommend installing new components rather than installing used parts if possible. Remember that most of these transmissions are already old and worn, so it’s worth getting new parts in most cases.
1. Brand New Transmissions & Parts
If you are looking for just any parts for your 700r4 transmission or a brand new transmission, I recommend you check it out on Amazon or eBay if you live in the USA or Europe. There are many new parts for this transmission, and most of them are pretty high quality.
Check the recent customer reviews of the part to get an idea of the quality of the product. To see the parts, you can go to Amazon by clicking Here.
2. Used Parts
If you are looking for a used transmission, you can find it online. You can probably also find one at any nearby junkyard. Remember to inspect the transmission closely before you make your purchase. Try to get as much information as possible about it, like the mileage, how many transmission fluid replacements were done, etc.
78 thoughts on "700R4 Transmission: Specifications and Common Problems"
bob mitchell
I have a 1989 Suburban with a 700r4 with a TV cable setup. Along with the electrical brake petal switch. It also has a vacuum switch that I assume just shuts down the cruise control. The vehicle will throw an intermittent Code 42. EGR MAP sensor error during the following situations after it is fully warmed up and generally at highway speeds. The check engine light generally will come on when the brake petal is depressed and turn off when released The check engine light will generally come on solid at speeds below approx. 40-45 MPH. No matter the amount of load on the engine. When steadily accelerating to a higher speed, the light will slowly fade out over several seconds at speeds above approx. 50+ MPH. The check engine light generally will come on at highway speeds when the engine is at idle and not under load. It will go out when any RPM’s are applied to the engine while not under load. As engine load changes at steady RPM’s the light will be solid when it has downshifts to 3rd and will go out when it upshifts. The check engine light will generally flash when shifting from 3rd to overdrive and back. When this code 42 is active, my gas mileage goes into the dumpster. Everything in the EGR circuit has been replaced and there are no vacuum line connections between the EGR circuit and the rest of the vacuum system. We think we have eliminated possible electrical issues. But, are not certain if we have missed something. I do not know if it is related, but the cruise control will intermittently cut out when it attempts to apply RPM’s to maintain the set speed. anyone out there have any useful ideas?
Magnus Sellén
Code 42 means that there is an issue with the Electronic Spark Timing (EST) system when I check my resources. I would start there, and it may solve the transmission issues also!
Jim
I have a 700R4 that won't shift out of 1st gear. TV Cabe is set correctly and transmission, (Dexron VI), is full. What could be the problem?
Gary Kmit
I have a 74 chevy vega station wagon with a 350 sbc gen1 and turbo 350 trans, it has the monza rear end that has the torque arm connecting to the tail shaft housing of the trans, it has the housing from the monza that has the additional bolt holes that accepts the bushing bracket from the front of the torque arm. Is it possible to install the tail shaft housing from the turbo 350 to the 700r trans and bolt everything back together without any other mods? your input and feedback is greatly appreciated : )
Ken Jewell
Put 700r4 rebuilt for humvee 6.2 diesel. Having shift problem 1st to 2nd 15mph, 2nd to 3rd 25mph will not go into 4th at any speed. Fluid is correct. What might be causing this. Thanks
Joey P
Had this issue when we rebuilt mine. Check your valves in the valve body and make sure they are all inserted in the proper direction, and make sure they slide well and have no hang ups.
Ricky Godfrey
I have a I think it's a 1983 700r4 transmission that i pulled from my father's Chevy ch Caprice Classic it's a Canadian car the identification numbers on the transmission are 3YK196the last letter is either D or 0, the reason im curious about this transmission it has both a throttle valve cable and an electrical three wire hook up so could it be a combination of the 700R for 4160 ? It is definitely a 4-speed transmission. Help me please Thankyou Ricky Godfrey
GP
I may have missed it but what is the proper fluid level if you have to make a new dip stick? Properly filled when level with pan gasket or higher?
Henry Alicea
I have a transmission 4YK146HT is the ID stamped on the trans, could you tell me what its out of and any other information, I would really appreciate it, thank you
Crash
I have a 1985 GMC Sierra classic HD 3/4 TON TRUCK . WHEN I PURCHASED the valve body was not in the transmission. The guy who I got it from said that it wouldn't shift on it's own but he could shift it if he started in low one and manually shifted through 2nd and 3rd but still wouldn't shift to overdrive. I have figured out it's a 1988 700r4 transmission and it powered by a 6.2 letter diesel engine. I'm trying to figure out what kind of valve body to put back in it.
Mike J
Hi, I've picked up a rebuilt early 700R4 transmission to swap in my '67 Camaro. I have a 375/395 hp small block (or a 600 big block) in my car and this is "supposed" to be from a guy's Corvette. It has the orange corvette servo unit, but i can't find the Model Number Chart anywhere. I'm trying to find out what model it actually came from. Then i can confirm engine size ... etc.. So my ID # 3YP122D tells me it's an early '83 trans built on May 2nd 1983 built on the Day shift. BUT what is the model ? YP ??? Thank you
Jake
Adjust your info....4l60's didn't come tell '93...at least in the k series pickups. Myself, father and cousin all own k1500's and ALL HAVE 700R4'S....and yes I know that we own...they are 700s...it's sites like this that confuse ppl!!
Jake
Also forgot to mention that all 3 of our trucks are the same year... 92!
Jim Lacrone
I installed a 1991 3/4 ton suburban drive train in my project. It works well but having trouble identifying transmission, trying to get proper signal for Dakota digital electronic to mechanical converter. This transmission has a multi-pin plug on the drivers side near the center of the transmission, plan to count number of pins today. There is also a 2nd plug I believe just 2 pin located higher and farther back. This plug seems inconsistent with any thing I find, no tv cable on this drive train. There is a place for TV cable on throttle body linkage but no cable present.
Philip Spangler
[ installed a 700 r 4 in my 58 impala i has a 348 engine.i need to know what speedometer gear will work and if you have it?also dose the 348 need a computer to hook up the tranny? if not where dose the wires go? thanks phil
Michael William Young
Mangos where are you located.theres too many shade tree mechanics here in Fayetteville nc and the soldiers here are on the take too.i' all send my tranny to you to rebuild it as I can't seem to locate a 700r5 or 4L60e here.
Jay
Thank you for this article... I have a 1992 GMC Safari panel van ( Extended Cab I think it's called ) and want to know a lot about it... 1. What type transmission ( I might have my answer now ) 2. What Chassis/Frame is it? ( I'm guessing from Wikipedia its an S10 Pickup ) 3. What type of rear axle is it ( I want to transfer the rear drum brakes to Disc and Beef up the Shocks to heavy duty truck shocks and maybe beef up the rear diff as I am going to put a lot of electronics in it for a mobile recording studio ) 4. and YES when i am traveling about 55 - 60 MPH the WHOLE VAN SHAKES!!! I replaced the flex plate a couple years ago and never drove it until a couple weeks ago and I suspect something got out of balance 😕 plus I have never balanced ANY of the tires either LOL 🤣 5. ( Something you might not know but... ) I want to raise the roof about 2 foot... any suggestions? Thank you for being here. I hope to hear from you soon, Thank you, Many Blessings 🙏🏾 Jay.
Harold M.
I have a THM700R4; it has a yellow tag that reads 9MDy with a Barcode that when scanned reads 619MD Y. on the drivers side of the case near the solenoid cover stamped vertically on the case are the number 12 1712 1160. What does all this mean? and where can I go to gather information specific to this transmission?
Greg Miller
help me with ID i know all the numbers and figures but I cant seem to find out what model it cmae from my code it is 1chm , I know 1 is 1991yr chm? I know the m is 700r but ch is model and i cant find anywhere. Can you point me in right direction?
sal Camacho
i have a 700R4 out of a 1986 silverado 2wd and i am going to install it on a 1970 chevy C10 2wd. before i put it in i want to install a lockup kit. so when i go searching for one i see that the internal wiring have connectors of different colors. how do i know which one i to buy? Do i check the connector color of my current transmission
Adrian
Hi Good info on here. I am building my Right Hand Drive 1957 chevy truck. it will have a 400sbc engine and front suspension converted to ifs. I picked up a 700r4 transmission with the serial number 6YNM167H. I will install a 2" aftermarket column with column shift. My question is concerning the column linkage and if it will easily install on my Right hand drive since the column will be on the right side of the transmission, and what will be the best kit to use for the install. Thank you
Carlos Sanchez
Please help I have a transmicion with a number 9fmm152b could you help me with just what this number thank you.
Todd Gambino
Hi, thank you for all the good information but I am a little lost on my trans ID number ,it is 5YC317H,I understand the 5,but not the rest,can you help me out?thank you much
Chuck
Want to know model year for a700R4 trans. Case has this stamping on it : 8676359 Also K Serial number has been removed.
Charles Horvath
What does these numbers mean on a 700R4 transmission? 8676359 It's been rebuilt but seller doesn't know model year due to serial number having been scratched off.
James
Okay Brother heres the deal maybe can honestly help as i am in dier need of expect advise. I bought 91 cadillac d'elegance last year..when I bought the car it drove good until I would hit around 25 to 36.Than hell broke loose it would rev high and than speedometer would go up slow. Than once I got 37ish it seems it would kick in..Nooooow I bought another trans same kind its doing samething revs real high until I get to 23mph than like kicks in but sometimes the reving is still high. Even once its pass the 23mph..Please help me I really want this fixed my engine is a 305 n 700r4.
Robert
I’ve had my 700r4 rebuilt 2 times and it still won’t go into any gear any solutions
Don
I have a 1983 Riviera. Transmission works OK in drive. 2nd & 3rd gear the car won’t move. The transmission is engaged but it is like the brake is on? I don’t want to force much harder on the gas because it is just not moving. Again it is not slipping but rather just won’t move the car. Reverse is OK. Don
Don MacLellan
I have a 1983 Riviera. Transmission works OK in drive. 2nd & 3rd gear the car won't move. The transmission is engaged but it is like the brake is on? I don't want to force much harder on the gas because it is just not moving. Again it is not slipping but rather just won't move the car. Reverse is OK. Don
Troy
I have the same question
Jeff
Doing a string of 7oor4’s, looking for help with case I.D. - Auxiliary cases are obviously marked by a casting above the 2-4 servo, but! Unmarked cases are hit or miss. Auxiliary have a dam and spitter on the case, but that’s after we roll it and drop the pan... Are there any other I.D. marks externally to know for sure?
Mike
Please help, I have a transmission with a number 7FAM-Y-00708645, could you help me with just what this number is telling? Thank you. Mike.
Jonathan Moore
I have an 86 700r4 and it's pouring fluid out of the front. I've replaced the front pump seal and the bolts are tight, and the pump doesn't look cracked, could it be the torque converter or maybe the O ring behind the pump
Carlos Sanchez
Hi I have a 9fmm152b what’s kind I have
Paul Morris
I have an 86 suburban that will not move in overdrive or drive but will shift thru all gears if started in 1st. Manual shifting it runs like a champ. Tv cable is adjusted, gov. valve functioning properly, and fluid is in great shape. Any help is appreciated.
Juan
I was told Dexron 4 for my 700r4 and that Dexron 6 is for newer vehicles...please advise
GNeric
Your comment that the 4L60 is electronically controlled is wrong. That started in mid 1992 as the 4L60E transmission. 4L60s still had a throttle cable up to early 1992. Mid 1992, when the 4L60E came out, the square harness connector on the driver side (horizontal) was no more and became a round (green) connector on passenger side. Vertically mounted in the case.
Devin Lamar Peeler
What does the switch on the brake peddle do ? Like what will it cause if it's not working ?
Ivan
The identification I have on my K case is numbers only not alpha numeric.....so how exactly can I identify the year and what stage it is ???
Jerry Landry
Great info thanks. Mine works great but when I shift from park to drive it lurches forward. But shifts good during driving. Any ideas what would cause this?
Dean
Possible rear diff wear or damage can allow driveshaft to accelerate before engaging diff to transfer power. The clunk comes after stopping or forward to reverse shit. Hold the brake while running and have someone shift forward /reverse/ forward. There should only be a few degrees rotation when the shaft changes direction.
gary
thanks for the info. on the tv cable adjustment. how can I tell what stall speed I have on my converter. I don't see any info. on it . thnks
Kyle T Fahl
If the TV cable is not properly adjusted, what could that do to the transmission? I recently did a motor swap on my 91 k15. Well my transmission was working fine when I parked it one night, the next morning it will only go through 1st and 2nd 3rd just revs the motor and obviously it then won't reach overdrive.
Roger Williams
Great info!! learned a lot! My problem is this - i have a bbc with 700r4 in my 1970 Chevy 3/4 ton pu. when it shifts from 3rd to 4th at around 35-40 mph i lose accelerator power. it seems as if the tranny is searching for a gear - it will rev up and down until such time as the veh speed increases to about 55-60 mph then it will smooth out. I have the TCI lock up kit in it. Any thoughts or ideas? Thanks, Roger
Jessica Nicole Carter
Do you have a printable copy of the schematics to do a full rebuild of 700R4 I have an 1987 GMC s15 Sierra classic pickup truck and I would like to learn how to rebuild it
Kevin
Hi Magnus , Great write up ... I just bought a 89 model Chevy Truck with a 350 and the 700R4. The thing has very late shifts, hits 2nd gear at about 50 mph and if you stop throttling up before the shift takes place it goes into free wheel and will slip until you let off the throttle again and make a new attempt at the 50 mph shift. Is the Tranny junk or just the T/V cable out of wack, or is there a governor with the centrifugal weights giving me fits?
Kevin C.
I have a 1970 oldsmobile 455, is there an easy way to tell if a 700r4 is a unibolt version or Chevy only? I'm trying to put one in my car so I have overdrive but finding one has become a bit of a headache because idk which ones are which and most people tend to tell you what they think you wanna hear when they are selling them. Also are there different size bellhousings on them because I've seen some people post that theirs has a small bellhousing. Thanks
D Y
700's were chevy bolt pattern only. 200-4R's had a BOPC (Buick Olds Pontiac Cadillac) and a Chevy pattern cases, as well as a "unicase" that had both bolt patterns. No big or small, all Chevy Small and Big Blocks share the same trans bolt pattern, same with the ~late 60's onward BOPC's, "big" or "small" block, same trans bolt patterns.
Neil Long
I have a 1995 Chevy Silverado pickup truck 4×4 I am trying to identify the transmission it has a big K on the side of the transmission. Also it has an electrical plug in on the passenger side of the transmission .can you tell me what transmission it is ?
Roger Mayes
Lots of good info here -thanks . I have a friend/customer coming in next week with a problem he Hope's could be TV cable adjustment . But I haven't seen it yet and have my doubts. The car is an old street car and has a old 3.0 rear gear ratio, the first 50 -60 miles it's fine after that going at highway speeds it can't stay in hi gear but goes between hi and 3rd gear back and forth. Always the same to. Thanks in advance. Rog.
Darell Gholston
Great read and reattach on your part I just purchased one to replace into my which lost overdrive. It used to vibrate when going into over due so I'm thinking it was to torque converter now.
Magnus Sellén
Because of high demand and a high amount of comments, I do not have time to answer these specific transmission questions that require a lot of research to be answered correctly right now. I will come back to these later. If you have a problem with the 700r4 transmission shifting, check out the cable TV adjustment after this guide: http://static.summitracing.com/global/images/instructions/700r4%20cable%20adjustment%20instructions.pdf If you have specific questions that you need answers for fast and correct, you can ask a certified master technician here: https://mechanicbase.com/ask-a-mechanic/
Tom K
Liked your comments on the 700r4. I have the early 700 in a 82 corvette. It has been modified with Kevlar clutch pack, better shell, 30 spline input shaft, TransGo shift kit and a few other mods that I don't remember. The trans seems to shift fine and 1st to 2nd is firm, not violent, 3rd is OK as well and sometimes going into 4th is a tad slower than I would like, but I hardly use 4th/OD. However, when at WOT it does not shift by 6,000rpm and I have to lift off to make it shift. The governor also has lighter weights and maybe springs? Would the governor be the first place to look at? Any other comments on for sure things to look at would be appreciated. Thank you.
Noob
I have a simple question that im sure anybody can answer but me. On a 700r4, does P start from the left and rotate clockwise through the gears or the other way around?
Dan House
I put Dexron 3 instead of Dexron 6 transmission fluid in my transmission what problems is it going to create
Magnar Larsen
Hei , My name is Magnar and i live in Norway. I have a Corvette c3 modell 1978. The gearbox in this car is aTH7004TH R 4 Preppet for 502 It is standing a number at the side on the transmission . nr 8676359 and it is stamt a big K on the side of it I bought this Trasmission new in 2009 and the motor in the car is a 383 With 450 horspower Could you tell mee the part number at the filter kit for this transmission. If you could help mee i vil bee very greatfull I am not so good in Your Language but i hope you understand mee, It is about 45 years agoe sins i vas at scool for to try to loern somthing
ROBERT NELSON
Im converting column shift PRND21 to B&M floor shift PRND321 in my 1971 Chevy C10 which has a 700R4 transmission. I cannot get the shifting lever and transmission actual gear position to match. Now I'm confused as to how the stock column shift with 3 speed settings worked, and why the B&M 4 speed settings won't work.
John
Hi Robert, did you ever get an answer to this question? I have the same issue trying to adjust a B&M quicksilver shifter to a 700r4 trans. I can’t get things to line up at the trans.
Tony R Cope
This information was very helpful I have several old Transmissions now I can identify them as to what ones are electric Overdrive what ones are manual
Mel
Hello I have a 1985 K5 Blazer with a 6.2 diesel. My question is do I need to get a 6 bolt torque converter to go with my 700r transmission? Or should I use a 3 bolt torque converter? The problem is that I had my transmission rebuilt and it was driving fine until I punched it on the freeway way and it slowed down and it started sounding like bad lifters. So I pulled over and turned off the truck. Then I restarted the truck again and the noise went away. I took of driving and I punched it again and it drove fine. And after a half mile it started doing the same thing again. And it lost power. I turned the truck off again and restarted it. While driving around 30 to 40 miles an hour is fine. No problems until I get to high speeds. Right know I have a 3 bolt torque converter. So my question is should I get a new 6 bolt torque converter or a 3 bolt torque converter. Thank you in advance Mel
Ron Pratt
Great information! Thank you for taking the time to share!! I have a 1990 700r4 in a hot rod and 1st gear holds out till around 2800 rpms before it shifts. This is being easy on the throttle. I actually unhooked the tv cable and took around the block being easy on the throttle. Still held 1st to 2800 rpms. I do have the edelbrock correction lever coming for carb. With this information what could cause these symptoms? Also,... was watching video on adding the lockup kit. They showed the 4 TH gear port by a round cover on pass side to put switch in. I don’t see this on my trans.
Larry
I have a 1991 chevy pickup truck automatic transmission. There is white smoke coming from the exhaust , does this truck have a vacuum modulator? And if so where is it located? Everything esle is working fine. It is a 700R-4
Javier Pérez
Hi Is the 700r4 transmission the same as the 700 transmission or are they different?
greg
Sounds to me like a blown head gasket
Christian
hello, I have a corvette with the 700r4 gearbox, the fourth gear runs at 130 km / h is normal? the TV cable has been changed and adjusted, oil is perfect, can it be the governor? thank you so much...
Magnus Sellén
To me it sounds normal, does it feel like the transmission is slipping while you press the accelerator pedal?
Michael Dziechiasz
I have a 700R K. And it has been rebuilt by a shop. And so I'm building a 1974 International Scout. So I put the 1969 350 Chevrolet small block Chevy in it and I found a cave 700R for with the transfer case and I had it all gone through and rebuilt. And I bought my B&M shift kit shifter cable and what's going on is when I put my gauge on the transmission it says 115 PSI. In neutral. In park. And it doesn't seem to change when I put it in gear. And so I took it out for a drive to try to adjust the TV cable and no matter which way I go. It doesn't pretty hard shift into 2nd gear at about 20 miles an hour. And it will go into 3rd gear eventually when I get it up to 45 55 miles an hour. And from what I understand the PSI on idling 700R for should be about 75 psi. Should I take this transmission back and make sure he did something that he didn't do or what is your opinion?
Lisa
I have a 1991 Chevrolet Silverado with a leak around some electrical part on my transmission or drive shaft. Can you tell me what part I would need to replace to stop the leaking? I have a picture of it but not sure how I could send it to you. I am a 55 year old female who trusted a so called Chevrolet mechanic, and all he did was cause me more problems. I need some help!! Thank You!!
Magnus Sellén
If the driveshaft is leaking, you have to make sure that the breathing is okay in the transmission and replace the rear driveshaft seal. If there is an electric part that is leaking, there is a seal there too which have to get replaced or sealed :)
Mike Christy
First off, thanks for all the great information. Is there a site somewhere to fully decode the Identification Number? I have one installed in my 1969 C-10 and I'm sure it is not original, but am very curious as to what vehicle it was originally installed. I also noticed here under Common Problems. It says "Faulty Converter. Sometimes the catalytic converter can fail on the 700r4 transmission, unfortunately." I'm thinking instead of Catalytic Converter, you mean Torque Converter? Thanks again for the great information.
Magnus Sellén
Thanks for your input! I have also searched for a full decoding software for the identification number, without success, unfortunately. If I do find one, I will link to it! Oh yes, it should be torque converter, edited thanks for your report!
VOn
Magnus I plan on pulling a 700R4 from the salvage yard for a TH350 swap. What should I be sure to take from the donoR vehicle?
Lynn
Great write up. I just purchased a 89 700 r4. Going into a c10 1966. It currently has a TH350. Will the dust cover and dip stick and tube interchange? Thanks Lynn.
Brandon Yamamoto
I have a stage 2 not electric 700r4 that is what I was told when I purchased the truck. The only markings I can find is an 8 over a t. It has the 27 spline but I want to switch to the 30. My setup is a 355 carb, np203 tcase, 4.11 gears. In a lifted truck with 6in suspension and 4 in body, with 35 in mud tires. Do I need to change anything besides the pump and torque converter?
Amer Ahmad
Great info. I was advised to change the hydramatic jetaway on my 1956 Cadillac sedan de ville with a 700r4. Any advise on compatibility and modifications thanks Amer Lahore Pakistan
Pete G Mascola
Thank you so much !
Roger Murray
Hello my name is Roger I am rebuilding a 1964 impala ss and I can’t find a dust cover/flywheel cover. Every one I have tried the flywheel rubs the cover, is there a dust cover that will fit my car it’s a 327/300hp. Married up to a 700R4 just need help with the dust cover hope you can help thanks Roger
Ross Cordova
I have a '77 Camaro. The previous owner had a 700R4 installed in it. He doesn't know what year it is. I've had a long duration cam installed in it. Now a need a higher stall converter. Does it matter what year the transmission is. As I'm looking into purchasing a converter they have 700R4 & 4l60 using the same converters on some manufacturers. How important is it to have the year of the transmission. Some manufacturers request the year, other don't. What's your opinion. Thank you.