Truck: ‘97 GMC Sierra w/4L60E rebuilt 40k miles ago approx 2 yrs ago. Told it was give a “Level 1” shift kit, not sure what that entails?
Setup: Truck has SAS with 14 bolt rear end and 4.88 gears and 35” tires. Fluid is full and no check engine light.
Probem: shifts are too quick between all...