I have an '89 formula with a 700 R4 tranny on the interstate the torque converter locks and unlocks constantly. I have a 12" tranny fluid cooler. I know in the city I can disconnect the torque converter, but what can I do for it to stop the lockup on the interstate? I'm driving to South Carolina on Friday, please help!

 

i dunno, but i live in sc, why are you comming here lol...and where at in sc are you going????

 

My 700r4 used to do that constantly and it drove me crazy. The way I fixed mine was installing the B&M 3-4 downshift improver valve. You can get them from Summit, Jegs, etc. I haven't had a problem since. The only other thing I could think of would be the TCC solenoid has gone bad. I had that replaced on mine once though, and it didn't change a thing.

 

i going there with my friend to visit his family ion charleston. and i also changed my tcc selenoid and it did nothing

 

well, im in colaumbia, if you feel the urge to drive an hour from charleston to here, we can see whats up with the car, altho im not a tranny man....have you adjusted the TV cable lately????