Fixing Your NSBU Switch Allison 1000 Issues
If your truck is suddenly stuck in limp mode, checking the nsbu switch allison 1000 is usually the best place to start. It's one of those parts that seems small, but when it decides to act up, it can make your heavy-duty Duramax feel like a lawnmower. The Neutral Safety Back Up (NSBU) switch is basically the translator between your gear shifter and the transmission's computer. When that translation gets garbled, the truck gets confused, and that's when the headaches begin. ...