Rear end noise

hotdawg23 · 07-28-2009, 09:30 AM

Maybe someone out there can solve this mystery for me. It is a 2007 3500 dodge with the 6.7 L engine 4X4. I don;t know the gear ratio and don;t know how to find them. It has the auto trans and shifts perfect and has 187K miles on the truck.
Here is the problem: when letting up un the accelerator there is this terrible clattering noise coming from the rear end which stops at about 10 miles per hour. There is no noise when running down the road or taking off. The trans shifts perfectly and no clanging beteen shifts. U joints are OK and carrier bearing is good.

gmctrucks · 07-28-2009, 01:17 PM

Welcome and howdy from TEXAS. It might be the posi unit if it has one and you can find out what gears it has on the glove box. Also if you changed the rearend oil one must add a additive so that won't happen.

leolkfrm · 07-28-2009, 02:58 PM

it's 2 yrs old....make the dealer fix it, and let us know what they did

hotdawg23 · 07-28-2009, 03:24 PM

Quote:

Originally Posted by gmctrucks

Welcome and howdy from TEXAS. It might be the posi unit if it has one and you can find out what gears it has on the glove box. Also if you changed the rearend oil one must add a additive so that won't happen.

Thanks for reply. I just bought the truck and it does look like the oil had been changed recently as there was oil around the filler plug. What kind of additive should i use? ooor is it too late for that?

hotdawg23 · 07-28-2009, 03:26 PM

Quote:

Originally Posted by leolkfrm

it's 2 yrs old....make the dealer fix it, and let us know what they did

Thanks for reply. I did just buy the truck and there was no warranty on it. Is the dealer responsible for this repair regardless of mileage (187K) or who owns it? I may be learning something here that is good to know.

bradrhale · 07-28-2009, 03:34 PM

i thought about the warranty also but they wont cover 187K on the clock. i think the 07s had a 75 or 100 maximum. if it is chattering, the damage is probably already done. hav you pulled the plug and examined what the fluid looks like or if there are metal shavings in the pumpkin?? when you rattled the joints, did you shake the pinion as well to test for movement??

BernieB · 07-28-2009, 03:39 PM

How the heck does a 2 year old truck get 187k on it? That's 260 miles a day, 365 days a year.

bradrhale · 07-28-2009, 03:41 PM

someone in sales or service would be my first guess. met a gentleman once with a 2 year old navigator that had already broken 200K. he sold medical supplies.

BernieB · 07-28-2009, 03:46 PM

Quote:

Originally Posted by bradrhale

someone in sales or service would be my first guess. met a gentleman once with a 2 year old navigator that had already broken 200K. he sold medical supplies.

Yeah, but a 3500 4x4 with a 6.7 isn't your typical sales or fleet vehicle.

bradrhale · 07-28-2009, 03:48 PM

it is if you run hot shots. those dudes stay on the road quite a bit especially if their clientel is built up and requires alot of fast transprt.

07-28-2009, 09:30 AM	#1
hotdawg23 Junior Member Join Date: Jul 2009 Posts: 8	Rear end noise Maybe someone out there can solve this mystery for me. It is a 2007 3500 dodge with the 6.7 L engine 4X4. I don;t know the gear ratio and don;t know how to find them. It has the auto trans and shifts perfect and has 187K miles on the truck. Here is the problem: when letting up un the accelerator there is this terrible clattering noise coming from the rear end which stops at about 10 miles per hour. There is no noise when running down the road or taking off. The trans shifts perfectly and no clanging beteen shifts. U joints are OK and carrier bearing is good.

07-28-2009, 02:58 PM	#3
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 4,300	it's 2 yrs old....make the dealer fix it, and let us know what they did __________________ 4 wheels move the body 2 wheels move the soul B.W.A.I

07-28-2009, 03:39 PM	#7
BernieB Senior Member Join Date: Jul 2009 Location: Fredericksburg, VA Posts: 1,901	How the heck does a 2 year old truck get 187k on it? That's 260 miles a day, 365 days a year. __________________ If the guys who design 'em had to take one home, use it every day for 2 years, and do all the maint and repairs themselves, cars would have a button on the dash to change the oil, filters & plugs.

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07-28-2009, 01:17 PM	#2
gmctrucks Senior Member Join Date: Nov 2006 Location: Houston,Texas Posts: 4,030	Welcome and howdy from TEXAS. It might be the posi unit if it has one and you can find out what gears it has on the glove box. Also if you changed the rearend oil one must add a additive so that won't happen.

07-28-2009, 03:34 PM	#6
bradrhale Senior Moderator Join Date: Apr 2006 Location: Texas Posts: 8,014	i thought about the warranty also but they wont cover 187K on the clock. i think the 07s had a 75 or 100 maximum. if it is chattering, the damage is probably already done. hav you pulled the plug and examined what the fluid looks like or if there are metal shavings in the pumpkin?? when you rattled the joints, did you shake the pinion as well to test for movement??

07-28-2009, 03:41 PM	#8
bradrhale Senior Moderator Join Date: Apr 2006 Location: Texas Posts: 8,014	someone in sales or service would be my first guess. met a gentleman once with a 2 year old navigator that had already broken 200K. he sold medical supplies.

07-28-2009, 03:48 PM	#10
bradrhale Senior Moderator Join Date: Apr 2006 Location: Texas Posts: 8,014	it is if you run hot shots. those dudes stay on the road quite a bit especially if their clientel is built up and requires alot of fast transprt.