Quote:
Originally Posted by chargedtaco01
As you stated before, i'm also not a mechanic by any means but what I can say is that two piece drive shafts are made to have give or play in them. Now, if your truck is like mine was when you come to a stop or take off you feel the clunk/thud. Apparently that is the driveshaft where the two pieces come together (slip yoke) binding, not being able to freely move. When the grease is added, it can move freely as it was designed to do. All i can say is mine is still smooth and today i towed our bass boat with no issues as well.
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That makes a lot more sense. I was thinking that the clunk was from looseness or play in the drive line and that adding grease would keep that from happening (which didn't sound plausible). But your explanation of the clunk being caused by a lack of lubrication and thus the binding makes sense. So in essence, the problem is caused by things being too tight rather than too loose. Thank you.