1994 Caprice PCM changes for 3.08 to 4.11 gear swap
What needs to change in the tune when changing from 3.08 to 4.11 gears for a 1994 9C1 LT1 caprice? I changed the gear ratio for the speedometer to work correctly. The trans is taking a long time to shift from 1st to 2nd. The rpm's are higher than I want. I want to drive a couple of hundred miles with the new rear gears before the T56 swap.
1996 DCM Impala SS
1994 DCM 9C1 Caprice
1981 LQ9 4L80E Trans Am