allison 1000 six speed

  1. Dirtymaxrandy

    Help!!! 06 lly/lbz Allison 1000 6 speed clunking

    hello, I have a 2006 Chevy Duramax crew cab dually 4x4 Truck intermittently has slight difficulty coming out and going in to gears P,R,N,D, and coming in and out of park With a loud clunk harsh feeling as if it is loaded or parked on a hill once in any gear runs perfect, doesn’t skip a beat and...
  2. G

    2007 LBZ Allison Won't Shift

    Hello folks. I have a 2007 LBZ with 200K. All stock except Banks full exhaust and intake. Looking for some info here to get me going in the right direction. It popped a check engine light just before making a four hour trip from one property to another late Friday evening. Drove it about 4...