D light blinks-loss of power-under/over revving
 

Hello. I have an ongoing issue that has lasted over a month, 2 different mechanics and 5 garage trips. I really hope someone can lend guidance as it is becoming quite frustrating.

1. "D"rive light randomly blinks between 20-30 mph, quite frequently
2. Car bucked during acceleration at uphill stop
3. Local mechanic believes transition from 2nd to 3rd gear is not occurring smoothly (still under Powertrain warranty)
4. Dealer replaces TCM
5. D light continues to blink periodically, car bucks during acceleration at uphill stop again and loss of engine power, with RPMs dropping to 0, for about 4 seconds occurs
6. Dealer finds nothing wrong, states instrument gauge may be faulty
7. Same day D light blinks, significant lessening of power at 55-65 mph and RPM gauge jumps to 5 for 10-15 seconds

At this point I am just trying to get it on video so someone else can see what I am seeing. Any help on telling them what to look for would be greatly appreciated. Thanks.

Did you ever find a solution? I'm having the same issues with my car.