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Rear end shakes/hops after 65 mph

zeater04

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zeater04 Enthusiast

zeater04

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Well a couple months back all my spider gears shredded in the rear end of my 2000 GMC 1500 Z71. I had a "FRIEND" that said he knew what he was doing to replace all the gears and shims. Well the truck drives great (referring to the rear end) until you reach about 65 mph, then it starts to get this hop/shake you can feel in the gas peddle that doesn't feel normal. As soon as you reduce your speed to 60 mph it drives like there in nothing wrong with it. Any ideas would be greatly appreciated. Thanks for all the help

Mike GMC Enthusiast

Mike GMC

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Posted

I would agree, it sounds like the pinion preload may not be right. I would also take a look at your U joints.

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