i just replaced input shaft seal. and now the trans wont shift vary well i know there is oil in all the gears. now i know about the tv cable and the govinor. but they both look fine. but i really dont know. but here is what happens. i put it into revers and it shifts hard but i can drive. then i shift to drive. then i get going i get to 25mph it should shift to 2nd but it dont and my rpm is 2500 i hold speed at high rpm then it shifts. but i try it again to get to 3rd but i have to floor it to kick in overdrive to make it shift and by this time i think im in 2nd going 55 then i let go and it might be in 3rd but im puching 3500rpm going 55 i use to be going 1100rpm b4 i dropped the trans.this is all in a 84 gmc jimmy 5.0.i dont know what to do.
I know this sounds strange, but your transmission has a CPU (brain) and it is learning it's shift points again. Sometimes you have to disconnect your battery for at least 25 minutes, then reconnect to clear it completely, then try it again. The only other thing to do is get a performance chip for about 80 bucks, but it will be just doing the same thing and retraining the brain to shift at new shift points.
This Site Might Help You. RE: how do i fix my shifting points in 700r4. it wont shift till i hold 3300 rpm then it will after 10sec? i just replaced input shaft seal. and now the trans wont shift vary well i know there is oil in all the gears. now i know about the tv cable and the govinor. but they both look fine. but i really dont know. but here is what happens. i put it into revers and it shifts hard but i can drive. then i
700R4 transmission is a hydraulically controlled transmission. The TV cable controls the line pressure in the transmission ( along with a few other things ). Loosen up on the TV cable a little it should make the shift points sooner. Loosen it too much and you will burn up the transmission. Kick down should come in around 2/3 to 3/4 throttle. The adjustment is at the carb. where the tv cable bracket is. Moving the inner cable back to the firewall loosens it. If this does not work then you have a sticking throttle valve in the valve body. The four wires you talked about control the torque converter clutch only. There are no vacuum lines or computer functions of this transmission. Disconnecting the battery won't do anything other than loosing the radio presets.
100% agree with soft hearted. No computer controlls on that transmission, no vac eaither. The TV cable (throttle valve) is what controlls line pressure and your shifts. That along with the governor. Readjust (loosen) your TV cable at the carb and it should fix your prob
