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  1. J

    Allison 6sp: Please help!!! 2007 limp mode...

    Well, I finally did get the codes when he got in off the road, he spends so much time hauling out there it's tough to get the time, so excuse the **** out of me for trying to help him out in advance of getting the codes. I never asked anybody to have a crystal - not spelled "cristal" by the way...
  2. J

    Allison 6sp: Please help!!! 2007 limp mode...

    I'll call them right away, and see what they did. Something interesting that he just told me - when driving in the winter, it hardly ever goes into limp mode, except when pulling a long grade. It happens far more frequently in the warmer months. I'm working on getting the codes, and I will call...
  3. J

    Allison 6sp: Please help!!! 2007 limp mode...

    He had the work done at a speed shop, he doesn't have a tuner, just had the programming reworked to give an extra 45 hp is what he said. I'm not too familiar with this shop, but they did all the work, including the exhaust. Does that even sound right?
  4. J

    Allison 6sp: Please help!!! 2007 limp mode...

    He's on the road right now, but the next AutoZone he sees, he'll pull in and either have them pull the codes (I think they still do that for free)- he was just getting started again after having been in limp mode - or get a reader and pull them. I'll post them asap. Thanks!
  5. J

    Allison 6sp: Please help!!! 2007 limp mode...

    Hi, new here, so I hope I'm in the right place for this question. I'm actually writing for my dad - he has a 2007 (early model year, before the body style change) 3500HD dually crew-cab with the duramax and allison 6 speed transmission. He hauls campers and camp trailers around the pacific...
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