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'99 - '06 GM Truck Modifications
Differential & Driveline
Driveline Clunk
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<blockquote data-quote="Nasty02Avalanche" data-source="post: 3457" data-attributes="member: 414"><p>If you have a truck with a million miles on it and you are too lazy to crawl under it to diagnose a problem, don't you think that it is time to take it to a garage and pay someone to diagnose it for you?</p><p></p><p>There was a recall on the rear driveshaft on the 02 Avalanche I believe.</p><p>There was a balance issue that caused a vibration.</p><p>I can recall having mine replaced at the garage when it was relatively new.</p><p>About 5 years later, I started to hear a clunk noise when I pulled out - just like you. Only the universals in the rear driveshaft were good.</p><p>Some thought that it was the transfer case, I even changed the fluid in the transfer case after 80,000 miles - what a waste</p><p>One day while doing a lube job, I noticed that the front driveshaft was turning slightly each time I moved the vehicle.</p><p>This shouldn't be - since the front axle was not locked and the transfer case was working as designed.</p><p>I came to find out that GM did this because there is an issue with the front drive shaft being so close to the exhaust that it burns the grease out of the universal. I bought two new Spicer U Joints and I paid my friend to torch them out and properly install them.. a key note - you don't press them in like some people thinks! If the loops are properly preheated, you can put U Joints in with your gloved fingers.</p><p></p><p>Voila - the clunking noise went away!</p></blockquote><p></p>
[QUOTE="Nasty02Avalanche, post: 3457, member: 414"] If you have a truck with a million miles on it and you are too lazy to crawl under it to diagnose a problem, don't you think that it is time to take it to a garage and pay someone to diagnose it for you? There was a recall on the rear driveshaft on the 02 Avalanche I believe. There was a balance issue that caused a vibration. I can recall having mine replaced at the garage when it was relatively new. About 5 years later, I started to hear a clunk noise when I pulled out - just like you. Only the universals in the rear driveshaft were good. Some thought that it was the transfer case, I even changed the fluid in the transfer case after 80,000 miles - what a waste One day while doing a lube job, I noticed that the front driveshaft was turning slightly each time I moved the vehicle. This shouldn't be - since the front axle was not locked and the transfer case was working as designed. I came to find out that GM did this because there is an issue with the front drive shaft being so close to the exhaust that it burns the grease out of the universal. I bought two new Spicer U Joints and I paid my friend to torch them out and properly install them.. a key note - you don't press them in like some people thinks! If the loops are properly preheated, you can put U Joints in with your gloved fingers. Voila - the clunking noise went away! [/QUOTE]
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'99 - '06 GM Truck Modifications
Differential & Driveline
Driveline Clunk
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