Symptoms
-TC Light comes on
-the car shifts hard (auto)
-speedometer jumps up & down about 10-20 miles but not the cars actual speed
-the power steering appears in the odometer display screen and the car is harder to steer

I know its the TCM (transmission control module) because I have had it replaced by a dealer. The part/labor is under warranty but before i get it replaced again I was wondering if anyone else has experienced this issue or knows plausibility of the "ground fix".

Ground Fix
Hook a wire to anywhere on the TMC then the other end of the wire place it on the body somewhere that would b a good ground. fixes all the bs
Source

Luckily it decided to crap out at my work but its a pain in my ass and not close to home. Any advise or confirmed fixes is much appreciated. Thanks