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Old 08-12-2005, 10:39 PM   eBay Motors  #1 (permalink)
 
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Rear end Jolt

Hey guys. I just bought a 2002 chevy 2500 HD with the Duramax 6.6 and the Allison Transmision. I notice that when I leave a dead stop and start to move forward in Drive I'm feeling and hearing a pretty good jolt from the rear end. The shifting is super smooth and quiet but the something seems strange in the rear end. The Chevy dealership's sevice department is telling me this is a common characteristic in this truck with this powertrain. Wondering what you think before I pursue a 2nd. opinion.

Thanks guys.
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Old 08-13-2005, 11:07 PM   eBay Motors  #2 (permalink)
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sounds normal to me.
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Old 08-15-2005, 03:26 PM   eBay Motors  #3 (permalink)
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I'm new to both this forum and Duramax/Chev. I just bought an 02 K3500 CC,LB,w/36K miles. I have not noticed such a rear end noise, clunk, or gear slack. The only time anything similar happens is when shifting the Allison into gear, then it's not a clunk, just a lurch against the brakes. Differential gear setup is exacting and if not performed with precision, either the gears will whine, clunk, growl, well you get the idea. Kinda like never buy a car built on Friday or Monday thing- well perhaps you guys are too young to remember those days.
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Old 09-01-2005, 05:44 PM   eBay Motors  #4 (permalink)
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welcome to dmaxforum ray!..and yes im too young to remember...lol
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Old 12-22-2005, 10:43 AM   eBay Motors  #5 (permalink)
 
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Pull the driveshaft and lube the spines, noise will go away.
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Old 12-22-2005, 04:55 PM   eBay Motors  #6 (permalink)
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Quote:
Originally Posted by David Kott
Hey guys. I just bought a 2002 chevy 2500 HD with the Duramax 6.6 and the Allison Transmision. I notice that when I leave a dead stop and start to move forward in Drive I'm feeling and hearing a pretty good jolt from the rear end. The shifting is super smooth and quiet but the something seems strange in the rear end. The Chevy dealership's sevice department is telling me this is a common characteristic in this truck with this powertrain. Wondering what you think before I pursue a 2nd. opinion.

Thanks guys.
Does that '02 have the one piece aluminum telephone pole under there?

If you have the two piece you may need to upgrade (if in warranty) there was a bulletin out that addressed this... "launch shudder" or like Aketay said lube those splines...

Quote:
Originally Posted by aketay
Pull the driveshaft and lube the spines, noise will go away.
You took the words right outta my mouth Tony...
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Last edited by Pepperidge; 12-22-2005 at 04:57 PM.
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Old 02-27-2006, 05:29 PM   eBay Motors  #7 (permalink)
 
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jolt or thump

pull the drive shaft & put some anti-size it will disapear no more thump!
mine did the same thing!
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Old 05-05-2009, 12:16 PM   eBay Motors  #8 (permalink)
 
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I'm having the same thing happenning with my truck too only mine does it when I stop then let up off the brakes. Could it be the the spring shackle rubber is wore out?

Mine feels like the rear end gear is missing teeth and it seems to be getting worse.

Also seems like the transmission is slipping, how can you tell if it is or not?
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Old 05-05-2009, 12:32 PM   eBay Motors  #9 (permalink)
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Quote:
Originally Posted by nascar24 View Post
I'm having the same thing happenning with my truck too only mine does it when I stop then let up off the brakes. Could it be the the spring shackle rubber is wore out?

Mine feels like the rear end gear is missing teeth and it seems to be getting worse.

Also seems like the transmission is slipping, how can you tell if it is or not?
You are feeling the dreaded "GM STOP CLUNK" GM actually makes a spacial lube, but I have found just cleaning the splines really good, and putting a good wheel bearing grease will cure it for about a year. Then you get to do it all over again:rockin
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Old 05-05-2009, 01:14 PM   eBay Motors  #10 (permalink)
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Great Posts Guys Ive Been Trying To Figure This Out Also!
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