Just did this:

1. Raised both masts and supported them on the pallet rack.
2. Located the limit switch and activated it several times with my finger to observe operation. It clicks nicely.
3. Placed an object in front of the limit switch so it remains in the inward position.
4. Raised the drive wheel off the ground and operated the forward and backwards handle in both the turtle mode and the rabbit mode. No difference. Still only goes 1st and 2nd gear, no FAST gear..