Tcc lock up

[78Delta88]

What's your location? I'm SW AZ by Tucson/Vail AZ.

 

[90hurst/oldsguy]

What's your location? I'm SW AZ by Tucson/Vail AZ.

I'm from southeast Missouri 2.5 hours from st. Louise

 

[L05edSS]

What will cause the tcc lock up in 200r4 to stick and not release? This trans has been rebuilt in 2015 and has had new tcc lockup solenoid and it stays in engage when the car is slowing down.

breaklight switch going bad? i assume you're driving it in the OD position, what happens when in D position, that should cut around any tc lockup.

 

[78Delta88]

Out of honor for other techs I retract my comment about not knowing what to do. More likely if only GM trained he would only know the OEM build/repair regimen.

Any how give Power Proven a call, these guys are one of the best in Chicago area. Would be about 5 to 6 hour drive, but they will do you right. I did a good amount with them in early eighties.

Maybe call them first and explain current problem.

 

[90hurst/oldsguy]

breaklight switch going bad? i assume you're driving it in the OD position, what happens when in D position, that should cut around any tc lockup.

Brake light switch has been replaced

 

[Bonnewagon]

That would happen on my Mom's Oldsmobile. When I replaced the lock-up solenoid it was supposedly an 'improved' design. No trouble after that.

 

[90hurst/oldsguy]

That would happen on my Mom's Oldsmobile. When I replaced the lock-up solenoid it was supposedly an 'improved' design. No trouble after that.

I still had the sans issue with a new tcc solenoid

 

[Bonnewagon]

Maybe the high gear switch on the valve body? It only allows lock-up in high gear. On my T-350-C it would stay locked up until I dropped down into first gear. I ignored it, but it could have gotten worse.

 

[CopperNick]

The "bang" aka abrupt shift into or from gear to gear could be a case of malajusted TV Cable up at the carb. As for the TCC, is the electrical connection properly grounded? Correct amount of ATV and the correct kind of ATV for the application?



Nick

 

[78Delta88]

Maybe the high gear switch on the valve body? It only allows lock-up in high gear. On my T-350-C it would stay locked up until I dropped down into first gear. I ignored it, but it could have gotten worse.

TCC should unhook the moment 3rd shift line pressure pressure reduced. More possible is builder put in an incorrect or the common op switch that closes at much lower line pressure. It should have disengaged with downshift.