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Discussion Starter #1
My truck has done this twice now. I was sitting stopped in the middle of the road and the tranny made a clunk and went into neutral moved shifter up and back to drive and it was fine. like I said its done this twice but not all the time whats mcausing this
 

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Assuming the fluid level is correct---- it may be the NSBU switch. Lots of problems with the switch, as it is exposed to the elements. It will usually display "Shift Range Inhibited" on the DIC display.
 

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as so it could be a solinoid... my truck would clunk and get stuck in different gears
 

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my fell out of gear when my transfer case started to go.............but may be nsbu,t case,or tranny.......
 

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Discussion Starter #6
thanks for help guys I check that switch
 

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Try to buy from a Allison ( $75) or next a NAPA dealer ($50)-- The one from GM is gold plated-?? - cost like $250.
 
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