I have a 1993 olds regency with 250000 miles on it. the transmission was overhalled about 30000 miles ago. A year ago when I was in Mississippi the air temp was 106 degrees. the car would not shift into overdrive until we went thru a thunderstorm about 3 hours later and the temp dropped about 30 degrees. It has been running fine until a few days ago when we took a day trip of 90 miles one way.The air temp was mid 80's.After setting about 2 hours we headed back home and the car would not shift into overdrive all the way home.The next morning when I took it to the transmission shop it ran fine,as it has since. The shop couldn't find any thing wrong. It had a DTC code 39 ,tcc problem which was cleared. Other than the overdrive problem it ran and shifted fine.I would appreciate any help that you can give me. Thank you, Glenn Pike

Hi,

The problem you have is the TCC solenoid in the transmission which you need to get checked/cleaned as this is the reason you are having this problem.

There is one other area that could be causing this problem also and that is the TCC filter but this is also in the transmission and is under the TCC solenoid, so either way just get this 2 components checked and tested and then you will be fine after that.

Hope this helped, let me know if you need more infor mation.

Thanks

Jason
Hi,

The problem you have is the TCC solenoid in the transmission which you need to get checked/cleaned as this is the reason you are having this problem.

There is one other area that could be causing this problem also and that is the TCC filter but this is also in the transmission and is under the TCC solenoid, so either way just get this 2 components checked and tested and then you will be fine after that.

Hope this helped, let me know if you need more infor mation.

Thanks

Jason