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allison tansmission going in limp mode

  
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allison tansmission going in limp mode

 
jusnik jusnik
New User | Posts: 2 | Joined: 09/09
Posted: 09/06/09
05:01 AM

I have a 2003 duramax with an allison transmission.  When I am going down the road without pulling a load and in 5th gear, it will jump out of gear with an awful noise and go into limp mode.  I do pull a load every day and do have a bully dog programmer on it.  I took the programmer off and it still goes into limp mode.  Can anyone help?