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Hi there I hoping someone can help me with My 2001 Dodge 2500 Cummins , this truck is the first new truck I have ever owned bought it for the motor after working on and around Heavy equipment most of My life . Just after I bought it about 4500 Miles when pulling a grade rolling at 54 to 68 Mph the Rpms would drop 2-250 rpm and jerk a bit but only loaded down and going up hill .I took it strait to Earn Harts Dodge It was there a week they all's they did was flash it and it lost a ton of power and it did not fix it .Next they put a APPS in it , no good plus 4 more At Larry Miller Dodge Glendale AZ just to make sure next they rewired the power wire from the Alt so many times I lost count .Then hacked up the wire harness bypassing other wires and every time telling me it was fixed . This was all before I lost the lift pump at 75000 after the warranty was up . Brand new VP44 out of MY pocket Fast fuel pump and still more of the same . A tuner to try and get back all the power loss from the 35 plus flashes 35 the amount of times it was at the dealer ship under and out of warranty . The Service manager finally told me I had to live with it . because he said they couldn't find the cause Sorry for the Book So last year I had to put a Trans in it all bilit best of everything $3500 could get . Now the rpms don't drop the go up 200 rpms jerks it is constant And It's Pissing Me Off . The Trans Guy took a ride with me with his scan tool just like the Dealers Top Mechanic did who said nothing Trans Guy said it is loosing power to the APPS which screws with the Computers big time ??? If Anyone has or knows of a fix please help Thanks Ken