700R4 transmission shifting problems

Rnot shifting right The 700Ris still a mechanically controlled transmission (with the exception of the locking converter circuit mentioned above), and depends physical pressure sensors and a sort of throttle position sensor to get it’s throttle position right. Transmissions and Drivetrain - Page - Third.

Third Generation F-Body Message Boards. The car shifts perfectly (for my driving style) while driving normally around town or highway. 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. My T-700Rwon’t shift out of first gear….

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 (TV) and the TV valve controls all shifting activity. To fix this problem , the valve body needs to be removed from the transmission and sanded on a perfectly flat surface.

All of the valves should be removed and a fine grade emery cloth should be used to clean up the bores and the valves. Due to the age of the 700R, a common problem is leaking from seals and gaskets. Common problems in the 700Rinclude: problems caused by improper TV cable hookup, overheating and valve bore wear.

So if the TV cable is not adjusted properly, it can cause numerous transmission problems. I do not intend to say that a pressure gauge is never needed for the diagnose of a problem with this transmission. I tried to give a little more life to my old transmission , by giving it bigger serveros, to put more pressure on the burnt clutches.

The transmission will skip gears. It also may act like it is trying to “find the right gear”. I got the 700Rput in in August (months ago). The shift linkage can be reused.

D will be O will be D and 2nd and 1st will be to the left and right of the 1. Re: 700Rshift problems ? Using the directions that came with the wiring kit It said to power the switch, ground it as well for the LED in the switch, then a wire from the switch to the two terminal pressure switch, then from the pressure switch to the connection, and theno one wire on the connection goes to ground. At the selector shaft - the rod that connects your gear shift to the transmission. Speed sensor mounting point.

This will either be your cable screwing into the transmission housing or an electronic sensor bolted to the housing. If your car has a transmission cooler,. If the cable is badly mis adjusted it can destroy the transmission in shift. 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.

Now the transmission will work normally in reverse and 1st gear. The motor will rev very high in first gear and get to about mph. Check for details and sign on! RPM for my spee at which point it will accelerate fine again. Whether you need 700Rwiring diagram information, 700Rtransmission rebuilders tips, 700Rtechnical information, 700Rdiagnostics, 700Rtroubleshooting help, or.

From park it shifts positively and firmly into drive or reverse. Actually was the 1st year the 4L60E was used in GM trucks. Unless someone went to a lot of trouble to install a 700R,you do have a 4L60E. Besides checking fluid level,the best approach. PLEASE READ THIS: I am not a transmission repairman.

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. Most shifting problems can be traced to the valvebody, and the two main factors that influence it. Shifting problems are a whole new ball game. The TV Cable, and the Governor.

Diagnosing GM Converter Lock-Up Problems Share. C, must shift to 3rd before the. Anyone have any knowledge about what might cause it to never even try to shift into 4th? Any input would be appreciated.

A year later I finally got the body back on the frame and started the engine. When I started to shift the transmission through the gears to get the fluid circulating, I initially had reverse gear. Other common problems our experts experience in both the TH3and TH4is the amount of automatic transmission fluid (ATF) in the vacuum modulator. Our trio of professionals suggested to check the modulator, pull the vacuum line off and check for signs of ATF in the hose or the the nipple of the modulator. Rhigh RPM shift problems.

If the fluid used was dexronIII this turns to acid and degrades with temps above 2deg f quickly. I replaced the malfunctioning governor with a used functional one and the transmission began to shift correctly,. When it comes to a 700rand even the fully electronic 4L600-E , it works the same, another words when you shift into rev or forward at a dead stop from park it is completely controlled by the.

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. I plan on removing each shift valve,and place them in a seperate bag to clean and inspect them,and I will then have the main casting taken and have it cleaned and blown dry with air. Clutch release problems may be the cause. Shift linkage problems , both internal and internal will also cause the transmission to lock in a gear.

Make sure that the linkage or cable is not binding. Stuck interlock or detent pins or balls will also prevent the desengagement of gear. 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. Well I tried the brakeclean idea today and had no luck. I put the truck on jack stands and with my hand thottle i was able to what i think get it to ocationally get it to shift.

I think it is now a tv cable problem anyway.