Transmission question

lomac9

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When driving the truck for the first time of the day I have this problem. When it shifts threw all the gears and gets into overdrive it starts a bucking. I can accelerate to make it downshift then let it shift back into overdrive and bucks again. I go threw this 4-5 times overdrive, downshift overdrive and then all the sudden it clears up and runs smooth in overdrive w/ no probs. All other gears shift fine. Truck is at full operating temp when this happens. Not like I just jump in it cold and romp on it. Anyone experience this?
 

BIG JOE

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Get it Scanned for any related Codes ?

How many miles on the tranny & fluid ? Maybe the VSS is getting weak/dirty, from Time & Miles. ?

Joe
 

lomac9

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truck has 119k. drained fluid and replaced external filter approx 2000k miles ago. but was doing it before then
 

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