I heurd that the piston that put pressure when you shift gear on an automatic transmisson is in plastic on the h2 and CAN be replaced whit one from a corvette, witch is in aluminum and it would improuve shifting it should be a 30 min djob or so...

Any one heurd ?
Part number ?

Tku

 

The H3's have the same issue to an extent. I called the dealer and the factory came out with a metal one. A good place to check might be the dealer. Good Luck!!

 

search the hummer forums for "corvette servo" you'll find many install threads and the positives for upgrading the servo.