allison lly transmission

  1. C

    HELP Transmission

    I have a strange issue when the truck will try to downshift to second and will go into a false neutral and then jump into gear and go into limp mode. I have got a "second gear incorrect ratio" code and a P0776. Is the transmission ruined? or do I just need a valve body
  2. DirtyDan91

    Allison 5sp: Tranny Slippage?

    I have a 2005 lly duramax with efi live tune and a stock tranny, nothing has been done with it, that i know of since i bought it back in september of 2010, i turned the chip up a few weeks ago and the sucker went into limp mode on me, i was running a p0700 error, i stopped using my chip now but...
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