Join Date: May 2007
Location: Puyallup, WA
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i think he means the front slip yoke coming off the trans...
By bump... do you feel like the truck is starting to move then there is a thud? If it is, id first check carrier bearing and u-joints.
Additionally, you could have the same thing I do and have axle wrap issues. check your rear sprint u-bolts, make sure they are tight not walking on the axle.
PHP Hydra, Insight CTS, Intake, RR Boots and plenum inserts
345,000 miles and counting!