Re: c6 shifts to fastJune 17 2012 at 8:03 AM
from IP address 184.108.40.206
Response to c6 shifts to fast
You can try turning the screw inside the modulator in a few turns.
There are different modulator pin lengths that will help.
Some trucks had a very early shift pattern, the large governor weight has a big honking slug inside of it that is one cause for the quick shifting.