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  1. BlkMax

    Allison 5sp: Ali falls out of 5th...is stuck in 4th...no reverse...

    I'm OK with doing a rebuild, but I did not want to spend the $$ if it was an electrical problem. Can you smoke the clutches without having any trash in the pan?
  2. BlkMax

    Allison 5sp: Ali falls out of 5th...is stuck in 4th...no reverse...

    Thanx... I will have to check, but how would the NBSU cause the transmission to drop from 5th to 4th while on the road, then stay in 4th after mutiple key cycles? Sorry, I did not say that earlier about the key cycles.
  3. BlkMax

    Allison 5sp: Ali falls out of 5th...is stuck in 4th...no reverse...

    HELP, My transmission is "falling" out of 5th gear and stays stuck in 4th gear. While it is in 4th gear only, it does not have reverse. When this happens, the truck throws the "Shift Range Limited" code. So far, I can fix the problem by letting it cool down (usually over night), or by...