Okay replaced the TPS today and drum roll please.
Wow, that changed things, over the past few weeks I have been super sensitive to every shift point and sound the car makes. One of the alternate problems was a random high idle at stop lights. So changed the TPS and what happened.
1) Transmission shifting is 15% smoother. Downshifts are normal.
2) More power, She moves like she should. Throttle is more responsive.
3) High Idle issues are completely gone.
As for (D) transmission hard shifts /limp mode/fans at 100% this will take time, but if we are good over the next couple of weeks I will say it is fixed. Replacing the TPS ($30.00 at Autozone) made a real and tangible difference.
Apparently the TPS can confuse the PCM and cause the car to go into a limp mode. It is scary and does not throw a proper code for it. People have dropped their transmissions to put in new pressure solenoids, only to have the problem crop back up.
Overall, If you are having the "fans on high/ hard shift" issue. I would say change your TPS (only $30.00 and easy to replace) and see if if things get better. Overall since this problem does not throw a code (or a proper one) it could not hurt and could save you a trip to the transmission shop.
I will update here if the problem persists with hard shifting. Or at least post if the problem has gone away for a minimum of two weeks.
Tuesday, July 17th, 2018 AT 5:38 PM