So far W.W. Williams Allison Service Center, Atlanta, has diagnosed a failure in the valve body. I assume they are rebuilding the valve body, it will cost me about three grand. They have indicated the top side of the trans is ok. Only 82k on 02" but they think a previous owner may have let it sit, will get more info next week. At least i am getting answers from these folk, they seem to be top flight.
I run a 02" Winny Journey pushed by Cummins ISB 275, Allison 2000MH tranny. A month ago my VP-44 injector pump started throwing a check engine light and code. I took it to a shop and it turned out that I needed a new lift pump and the VP-44 high pressure pump. Some how the techs managed to do something to my Allison that caused the check trans light to come on and it would not reset when the ignition was recycled. I suppose the Allison was in "LIMP" mode because it would not do more than 45 mph and ran as though the torque converter was not locking up. Waiting for the opportunity to get it in the Allison shop in Atlanta. They said it was not electrical as most of their problems often are. Anyone have a clue what might cause the problem ?????