Bob, when I wiped out my memory my tranny down shifted very hard but was OK upshifting. So if your problem is up shifting I would say to reprogramed the tranny. Then look for other things like vacuum leaks and electical gremlins and lastly check plugs again.
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06 GT Auto, Cool Vanila Exterior, Presto Change O 3bl, Cargo Mat and Net, Billet Oil Cap, Yoko Avid 4Vs Tires, 03 GT Wheels, 4 Chrome Door Handle Screw Covers, MOPAR Mud Flaps, H&R Rear Sway Bar, Freedom Strut Tower Bar, Rear Door Sill Covers.
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