Search results

Search the forum Search Articles
  1. A

    Tranny acts like its in neutral

    Hey guys, My 2002 duramax is having issues..... it will shift just fine for awhile but as soon as i come to a stop and try to go forward it acts like its in neutral, it will go in reverse but not forward in neither 2H or 4H, it will move forward in 4L, I have replaced the nsbu switch and the...
  2. A

    Allison 5sp: Bad NSBU??

    My 2002 Duramax is having issues... I'm wondering what are the symptoms of the NSBU switch failing?? I've googled it and it seems to be what the issue is, its started with the really hard down shifting then slipping before shifting up, and has a habit of locking into 2nd gear or 1st gear where i...
Top Bottom