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I'm getting a strange noise coming from the rear of my truck upon starts and stops. I have a 2014 6.2. I've tried spraying WD-40 on all suspension (leaf springs, shocks, etc...) It's only when I take off from a complete stop and right before I come to a complete stop. It sounds like a something is slipping under load like loose bushings or something. Anyone ever have this issue?
 

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If it’s a clunking sound there’s a slipping issue in the driveshaft. I brought it to my mechanic he has the same issues with his truck. I used some industrial grease that goes into a hydraulic grease gun we use and it works perfect no more slippage on either of our trucks. He said I should make a patent on that grease because he knows others and is going to fix there’s with it. Let me know if you need and further info on the type of grease...👍
 
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