Rear end Jolt

David Kott · 08-12-2005, 09:39 PM

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.

dmaxpwr · 08-13-2005, 10:07 PM

sounds normal to me.

Ray,IN · 08-15-2005, 02:26 PM

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.

dmaxpwr · 09-01-2005, 04:44 PM

welcome to dmaxforum ray!..and yes im too young to remember...lol

aketay · 12-22-2005, 09:43 AM

Pull the driveshaft and lube the spines, noise will go away.

Pepperidge · 12-22-2005, 03:55 PM

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...

duramax285pro · 02-27-2006, 04:29 PM

pull the drive shaft & put some anti-size it will disapear no more thump!
mine did the same thing!

nascar24 · 05-05-2009, 11:16 AM

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?

mijdirtyjeep · 05-05-2009, 11:32 AM

Quote:

Originally Posted by nascar24

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

REDHOSS02 · 05-05-2009, 12:14 PM

Great Posts Guys Ive Been Trying To Figure This Out Also!

08-12-2005, 09:39 PM	eBay Motors #1 (permalink)
David Kott Junior Member Join Date: Aug 2005 Posts: 1	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.

09-01-2005, 04:44 PM	eBay Motors #4 (permalink)
dmaxpwr Member Join Date: Aug 2005 Location: Meredith, NH Posts: 56	welcome to dmaxforum ray!..and yes im too young to remember...lol __________________ 2005 Chevy 3500 4x4 (dually), LLY, LT, CC Previous Vehicles: 2003 MCS Indi-Blue, 6SPD Manual, sport, performance packages (I really Miss this vehicle) 1994 Chevy Silverado Reg Cab 3500 Black on silver 6.5TD 5spd Manual (don't really miss this)

12-22-2005, 09:43 AM	eBay Motors #5 (permalink)
aketay Junior Member Join Date: Dec 2005 Location: Peculiar, MO Posts: 1	Pull the driveshaft and lube the spines, noise will go away. __________________ 03' GMC K2500HD SLT CC SB EJ w/Attitude, SC LV III (Thanks Eric), Nicktane, H2's w/ BFG Rugged Trails, little black tubes to step on, custom dented tailgate w/ VR Straps to hold it in place, Denali projector beam headlights, Bilstiens, Line-X over the rails (protects against scratches, not dents), Air-Lift SD bags(to control the sag) and parts from http://www.gmdieseltech.com/

02-27-2006, 04:29 PM	eBay Motors #7 (permalink)
duramax285pro Junior Member Join Date: Nov 2005 Posts: 3	jolt or thump pull the drive shaft & put some anti-size it will disapear no more thump! mine did the same thing!

05-05-2009, 12:14 PM	eBay Motors #10 (permalink)
REDHOSS02 Senior Member Join Date: Apr 2008 Location: F-U IM FROM TEXAS! Posts: 526	Great Posts Guys Ive Been Trying To Figure This Out Also! __________________ 2007 Silverado 2500hd LBZ ccsb 4x4 EFI tuned by someone, need a tune guys HELP! SOLD 2002 SILVERADO 2500HD LB7 CC LB 270,000 MILES EFI TUNED, Shimmed fprv 4" MBRP TURBO BACK W/ 6" TIP K&N INTAKE W/ 2" RESONATOR PLUG modded intake horn...COGNITO HD TIE RODS 20" MB SHAKERS W/ 305/50/20 TERRA GRAPPLERS BANKS BIG HEAD W/ PPE BOOST VALVE

08-13-2005, 10:07 PM	eBay Motors #2 (permalink)
dmaxpwr Member Join Date: Aug 2005 Location: Meredith, NH Posts: 56	sounds normal to me.

08-15-2005, 02:26 PM	eBay Motors #3 (permalink)
Ray,IN Junior Member Join Date: Aug 2005 Posts: 82	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.

05-05-2009, 11:16 AM	eBay Motors #8 (permalink)
nascar24 Junior Member Join Date: May 2009 Location: Albuquerque Posts: 2	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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