after climbing out of a wash I wasdriving around and I felt a load pop and everything slipped into nuetrual for a second. Now I can drive fine in 2 hi but if I put it in 4 hi it tries to engage but just keeps slipping and popping. I am not able to shift into 4 low it is hung up on something. sound like a chain? or a stripped gear? or shift fork? something else? I had this thing apart about two years ago and changed the output gear to a 32 spline. but I cannot remember how everything looks inside there. IIRC the chain does not turn in 2hi therefor I could still drive around in 2wd with out noticing anything. I know I need to tear it apart and see, but would like to have parts on hand when I do what are your thoughts?