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Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. No Comments. Vehicles Equipped the R4 The R4 transmission was used in cars between and Build of the R4 The R4 transmission is made from cast aluminium, which adds to its sturdiness and ruggedness.
Dimensions of the R4 are: in. Some of these issues include: 1. Overheating A notable issue of the R4 transmission is overheating. Stuck Governor Dirty transmission fluid in the R4 governor can cause the springs located in the governor to be inoperable.
Some of these were: 1. Spline Shaft Instead of 27 spline input shaft, the R4 latter featured 30 spline input shaft as found in the TH transmissions.
Internal Components Also, internal components such as the oil pump housing and ring gear were updated in the R4 between , and this ended with an auxiliary valve body for s in Electronic Controls The R4, after being renamed to the 4L60, featured electronic controls that replaced its hydraulic shifting system.
Recent Comments. Leave a Reply Cancel Reply. Your comment that the 4L60 is electronically controlled is wrong. That started in mid as the 4L60E transmission. Mid , 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. What does the switch on the brake peddle do? Like what will it cause if it's not working? The identification I have on my K case is numbers only not alpha numeric 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? 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.
There should only be a few degrees rotation when the shaft changes direction. I don't see any info. If the TV cable is not properly adjusted, what could that do to the transmission?
I recently did a motor swap on my 91 k 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.
Great info!! I have the TCI lock up kit in it. Any thoughts or ideas? Thanks, Roger. Do you have a printable copy of the schematics to do a full rebuild of R4 I have an GMC s15 Sierra classic pickup truck and I would like to learn how to rebuild it.
Hi Magnus , Great write up I just bought a 89 model Chevy Truck with a and the R4. 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. I have a oldsmobile , is there an easy way to tell if a r4 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. Also it has an electrical plug in on the passenger side of the transmission. Lots of good info here -thanks. But I haven't seen it yet and have my doubts.
The car is an old street car and has a old 3. Always the same to. Thanks in advance. 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.
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. Liked your comments on the r4. I have the early 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.
However, when at WOT it does not shift by 6,rpm 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. I have a simple question that im sure anybody can answer but me.
On a r4, does P start from the left and rotate clockwise through the gears or the other way around? I put Dexron 3 instead of Dexron 6 transmission fluid in my transmission what problems is it going to create. Hei , My name is Magnar and i live in Norway.
I have a Corvette c3 modell 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. I cannot get the shifting lever and transmission actual gear position to match. Hi Robert, did you ever get an answer to this question? 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.
Hello I have a K5 Blazer with a 6. My question is do I need to get a 6 bolt torque converter to go with my r 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. Great information! Thank you for taking the time to share!! I have a r4 in a hot rod and 1st gear holds out till around 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 rpms.
I do have the edelbrock correction lever coming for carb. With this information what could cause these symptoms? Okay, update. Both have MD8 on the cases. Joined: Oct 19, Posts: 29 Profile Page. The 87 model will be the better of the two since this is the year GM made a host of durability upgrades to these transmissions.
Joined: Sep 8, Posts: 3, Profile Page. Fenders , Dec 16, Joined: Dec 18, Posts: 8, Profile Page. Some R4's may have a bar code sticker on the upper part of the bellhousing on the passenger side,take the number from it and Google it,I found out I had an '89 core that way. For a R4 build you for sure want a core as these have all the upgrades and are still non-computer. JeffB2 , Dec 16, Unfortunately, the bar code stickers are long gone on both.
Joined: Dec 20, Posts: 24 Profile Page. I cant tell from the photo but is the cleaner of the two transmissions the one with the code? See if there is a cam lobe shaped casting line that goes from in front of the dipstick hole up through the top oil cooler line and down to where the tv cable goes through. If it does it has the auxiliary valve body. Thats the one you want to use as it will have the better internals to work with and you can hydraulically lock up the torque convertor.
These R4's take a voltage source for the lock-up convertor. No R4's were ever built to be computer controlled. Joined: May 20, Posts: 18, Profile Page.
You can't tell the difference between a R4 and a 4L60E by the oil pan as they are nearly the same. If the transmission has a large pin electronic connector above the passenger side pan rail, it's a 4L60E , as seen here. If it has a cable connection near the cooler lines on the passenger's side, that's a R4.
Similarly, what years did Chevy use the r4 transmission? Automatic transmission on a Chevy can be identified in one of two ways: You can look at the size of the pan on the transmission or you can search for the identification number that has been stamped somewhere on the casing.
To undertake either method will require you to look under the vehicle. Yes, the computer has no control over the transmission. It will shift just fine without a computer.
Re: How much power can a stock r4 handle? Stock is rated at hp however some people have had trouble with them at around hp. Since you are not drag racing with slicks, upgraded r4 will be fine.
In , GM decided to code and renamed their transmissions, the R4 is best described as a 4 speed, longitude transmission rated for vehicles around lbs. It was this information that was used to change its name to 4L60 ; therefore, a R4 and 4L60 are the same transmission. Open the driver's side door and find the white card on the side of the door that is filled with small black lettering.
This card contains specific details about the year the car was made, its transmission , engine specifications and other details.
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