What to check

[tmsbuic]

The problem I'm having with my trans is the lockup solenoid area. What is happening is this: ONLY after the car has sat over night, when I drive it the next day and it goes into lockup convertor, it will not disengage unless I go WOT for a short period. After that, it works perfect until it sits overnight again. Now I installed a new TCC solenoid with no change. I did notice when it does go into lockup in the mornings and sticks there, the trans doesn't want to downshift unless its to the the floor.
Does anyone think my TV valve might be sticking and causing both problems until the fluid is up to normal temp.?
Like I said before, once I get it to not stick, the trans works great until it sets overnight.

 

[tmsbuic]

ttt

 

[chris718]

replace the lockup solenoid

 

[tmsbuic]

I replaced the solenoid with a new GM one with no change already.

 

[XSboost]

unplug the solenoid and see if it still does it, you might have a converter problem. when the converter locks up tap the brakes it should unlock. your sig it says you have a PST trans give them a call.