shifting problems
 

I was wondering if anybody has been having any problems with the 4l60e transmission torque converter locking up and letting go. I have a 1999 gmc sierra z71. While Iam driving the truck will shift fine and the converter will lock up. But after a while it will jump out. If I give it a little more throtle it will lock up again but as soon as I slack off it jumps back out. I have read a couple of forums and have heard that adjusting the tps might help. I was wondering how you adjusted it and if it would have and effect. Any help would be appreciated

RE: shifting problems
 

its not really adjustable...it jumps out even though the throttle is steady?

RE: shifting problems
 

yea just going down the road and it jumps out. If you have it in cruise control any time it hits a little hill it will lock back up. But as soon as it tops the hill it jumps back out. It changes about 200 rpms when it does it.