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Re: 07 2500HD Rear end thunk
My 10 does the same thing. It started after i had the driveshaft out to grease the u-joints. I've been told it is the slip yoke in the end of the transfer case. I've removed and greased the splines liberally and it got a bit better, but still there.
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1972 GMC LWB, 250, 4sp
2010 GMC Sierra 6.6 CCSB
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