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upinsmoke 07-25-2005, 11:51 PM Having a annoying problem when climbing medium grade hill with cruise on not towing, go to pass and accelerate near the end of the pass the trand pops down a gear and will not up shift to O.D. after unless put in neutral or shut off, no engine light. Slippage on attitude will spike to 6.0 % only happened twice. power setting on 3 both times. would appreciate some wisdom on the matter thanks Max Power 07-26-2005, 12:07 AM What year, make and model of truck do you have? I assume a duramax with an allison but you provided no information. How long since you have changed your fuel filter? upinsmoke 08-08-2005, 12:04 PM I own 2004.5 dmax lly crew short box attitude Max Power 08-08-2005, 01:15 PM How many miles on it? Have you ever changed your fuel filter? dieselmax82 08-08-2005, 01:27 PM what about ali spin on | ||