annoying torque converter unlock

[Rnpeder]

I have been having problems with my auto trans. Around 135k minles. Shifts decent while accelerating. When on the interstate, cruising around 80-85, it continually shifts in and out of lock up. Even under full throttle, it shifts in and out. TPS or linkage adjustment? or any other ideas?

 

[Joe G.]

Most probably TPS. Give it a good dose of contact cleaner where the shaft comes out. Then work the throttle linkage back and forth a few times. That might help.