I had a old GMC truck.
The pressure plate failed.
The clutch pedal would just go to the floor.
So I shut the truck off and stuck it in 2nd gear.
I started the truck and it took off down the road.
I pulled into the nearest GM dealer.
They put in a new pressure plate, clutch, throwout,
bearing and resurfaced the flywheel.
After driving the truck awhile I noticed a vibration.
With the truck parked and in neutral if I pressed the gas pedal slowly,
gradually increasing RPM, I could feel a shake in the gas pedal.
I told the GM Dealer that did the repair about it.
They told me that I drove the truck to their garage and they have
no way of telling if the truck had the vibration before the repair.
I complained to the owner and he said if they took it all apart
again and nothing they did was wrong, I would have to pay for the labor.
I said do it and that it did not vibrate before the pressure plate failed.
Well, it ended up that the Genuine GM pressure plate was 18 grams out of balance.
When I picked up the truck, I told them that if the rear main bearing seal starts
to leak or if a tranny bearing starts making noise I'll be back.
Maybe a welded on balancing weight fell off the pressure plate.
And now the pressure plate is out of balance.
(In my case GM never bothered to balance it at all!)
