2001 jetta tdi. Automatic. Only works in reverse. Wants to grab in dive but dosent move. Same with 3rd and second. 1st on the shifter engages reverse. Has been sitting in a garage so everything is dry. I understand the trannys are ****. Bought it for the motor to go in my yota. I havent changed the fluid yet or checked level. Just wondering if this could just be a speed sensor module or something simple before I take the motor out. Any info would be apreciated.