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My 2005 LLY tranny went into what I think was a LIMP mode the other day on the freeway. I was going about 70 at 1/2 throttle with no load other than myself in the driver seat. Tranny locked in what i think was 2nd or 3rd gear and engine check light came on. Took it to a mechanic friend of mine and he scanned it and told me the code was for "5th gear out of sink" I was running my edge juice w/ attitude in the #3 "drive" setting. Other than intake and exhaust that is my only other upgrade.
This is the second time the tranny has done this to me. The first time I was towing a 9k trailer in edge setting #2 tow mode merging onto the freeway at W.O.T. I think that one was my fault because I had put truck in Tow/Haul setting but did not turn O.D. off. The truck has 35k miles and has had the edge installed since I picked it up from the dealership. Edge told me it could be an issue with the unit so I sent it in for an upgrade (for the second time, the first time was to cure an issue where the truck randomly died at idle)
I guess my questions are;
Has anyone else had there allison tranny limp this easily? Is it really possible for the programmer to cause it to limp for any reason other than too much power? Once a tranny has gone into limp once is it more prone to limp?
This is the second time the tranny has done this to me. The first time I was towing a 9k trailer in edge setting #2 tow mode merging onto the freeway at W.O.T. I think that one was my fault because I had put truck in Tow/Haul setting but did not turn O.D. off. The truck has 35k miles and has had the edge installed since I picked it up from the dealership. Edge told me it could be an issue with the unit so I sent it in for an upgrade (for the second time, the first time was to cure an issue where the truck randomly died at idle)
I guess my questions are;
Has anyone else had there allison tranny limp this easily? Is it really possible for the programmer to cause it to limp for any reason other than too much power? Once a tranny has gone into limp once is it more prone to limp?