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  1. D

    Range shift inhibited on new trans build

    The trans got rebuilt when I broke the output shaft on it and no forward gears work only revers. I did a relearn on the trans and didn’t help, and got a used tcm and got it flashed and it’s still not working. Any help would be great. Truck has been sitting for 7 months now and can have nobody...
  2. D

    Range shift inhibited on new trans build

    I’m having the same problem but my truck is an 08 duramax did you find a fix for it?