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shifting hard

1stclasslawns

LawnSite Senior Member
Location
Arkansas
I have a 97 K3500 4x4 crew cab with 5.7 vortec and automatic tranny,

I have noticed in the last few days it is shifting vary hard into high gear, I am not sure if it is at torque converter lockup, or 3rd gear to 4th. Depending on acceleration it is between 38 and 50 mph.

Any ideas?

Thanks Jim
 
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