When I had my bell housing off to replace all the rubber bits I forgot to tighten the screws on the sender and it slipped out of adjustment. Maybe yours has slipped.
Mine is a 1995 model, lift a latch on the axle, slide it over and engage the lower gearing and keep cranking ... Keep it greased and it works great 27 years later..
The longer handle will give you more leverage if you're shoulder can tolerate the larger turning circle. I don't use my trailer often but the 2 speed really helps alot particularly at the shallow ramp that I like to use. (Close to home)..
