700R4 shifting problems

So if the TV cable is not adjusted properly, it can cause numerous transmission problems. Problems With the 700RTransmissions. Common problems in the 700Rinclude: problems caused by improper TV cable hookup, overheating and valve bore wear. This allowed for a true 1:connection between the engine and rear wheels at high spee which increased fuel economy. What You Need To Know Before You Buy A GM With A 700RTransmission.

Due to the age of the 700R a common problem is leaking from seals and gaskets. Especially prone to leakage is the front and rear seals. The rear seal can easily be replaced by just removing the driveshaft.

The front seal is a whole different story. My T-700Rwon’t shift out of first gear….

A very common problem that happens all the time. Even I am not immune to this problem. The valve body is the brain of your transmission, it has a valve in it called the throttle velocity valve. But with the 700r(and th200r4) use the cable to control the line pressure and therefore the part throttle shift pressures and points.

The angle of the lever the TV cable is on relative to the throttle position is critical. If you have all original linkage that is for a 700Rand not for a turbo4then you are OK and your problem lies elsewhere. The governor is under the tin cover on the LH side, towards the rear of the case.

You can pull the cover with large channel locks. I use a pair of dust cover pliers that remove the cover without damaging it. I use a 700Rin my truck and have accumulated the following information that might help you.

A lot of problems with this transmission after installation are due to improper TV cable hookup and adjustment. Whether you need 700Rwiring diagram information, 700Rtransmission rebuilders tips, 700Rtechnical information, 700Rdiagnostics, 700Rtroubleshooting help, or. The 1-shift on a 7can get really brutal, really quick when you do all the improvements to make it live. Better ban bigger servo, increased pressure all contribute to the harsh 1-2. The problem is that most guys drill the 1-feed hole too big.

RPM for my spee at which point it will accelerate fine again. From park it shifts positively and firmly into drive or reverse. Diagnosing GM Transmissions. In fact, some of the quickest and most consistent bracket racers rely on a slushbox to achieve their goals. The most common of those, at least with the older GM cars, is the Turbo-Hydramatic (TH) 35 TH40 and 700R4.

Shifting problems are a whole new ball game. Most shifting problems can be traced to the valvebody, and the two main factors that influence it. The TV Cable, and the Governor. Trans shifts into gear harshly, car feels sluggish off the line, No 1st, 4th or TCC lockup available, Manual 2n 3rd and Reverse are only available gears, CEL is on: transmission is either in limp-home mode or has lost electrical power.

Your transmission is a remarkable contraption. Somehow, it can shift your car from gear to gear, knowing how fast you need to go and how quickly you need to get there. The 700Rgot such a bad name for shifting problems that the name, not the transmission itself, got changed. The 4L60E with computer-controlled shifting eliminated the TV cable and substituted a computer program to control the shift points.

After it gets moving it seams to work fine. Can any give me an idea on whats wrong. Below is a list of some of the most common issues with the 4L60E.

L60E goes into neutral when shifting into third gear.

This is one of the most common problems with the 4L60E. It is pretty easy to diagnose. The first to second gear shift is late and harsh. This problem can be usually be traced back to the. The transmission has no reverse.

Chances are the clutch disks are simply worn out. If this is the case, you are bound to find a lot of debris in the transmission pan. If no debris is found in the pan,. Check for details and sign on! C, must shift to 3rd before the tester will light.

So I bought a new TV cable, installed it, and now the truck wont shift properly. I adjusted it many times to WOT. Another minor annoyance is that wide-open-throttle (WOT) up-shift is mainly determined by the governor that is driven off the transmission’s output shaft. Most rebuilt 700R4’s will use very heavy weights and light springs on the governor that will signal the transmission to up-shift at very low engine speeds. The main reason for the new design was to create an automatic transmission that was better on fuel economy.

Rso you can rule that out. The only thing that is electrically. Only other problem was that after doing the factory adjustment the setting was a bit to tight which created late hard shifts, but this was not a problem of the system itself, but the fact that there is a shim in the throttle plunger from the trasngo 7jr shift kit that will have to be removed to correct this.

At ~MPH, the first shift takes place. Right before it shifts, turn off the engine and leave it drive. Go a few feet, throw it in neutral and start it back up. In neutral, the converter is flowing oil throughout the tranmission.

Installed tranny and gave it a test drive.