Max D

Are you running an aftermarket computer? If you are, almost no models come with a shift controller for an Auto box, as a result, the ride will be ragged an unpredictable. They basically run maximum line pressure, rev it up and just whack her in gear whole doing funny things with your O/D. Best thing if you're running an aftermarket computer is to purchase a separate shift controller unit and install that on the car so it has the smarts to deal with the auto box.