1996 caterpillar 416b 4x4 forward gears work every time. When you start it up now reverse at all. The only way I get it in reverse is hold down the neutral switch and keep clicking it until it shifts in reverse once it is in reverse it works perfectly. . No slipping you can operate the machine all day no problem forward and reverse works every time you shift then once you shut the machine off and let it sit for a hour or more reverse doesn't work so you have to shift it in reverse and then use the neutral switch anywhere from 10 times - 100 times keep clicking it and boom reverse works perfectly again until you shut down the machine again..