Hello, need help on 4T80E, it starts off in 2nd gear, and upshifts normally. Tech 2 shows current gear 2, 1-2 shift sol shows off, and 2-3 shows off, 1-2 should be on. 1-2 will shift to on with 4th gear shift. Using tech 2 manual shift, trans will start off in... Login to read more.