Rear end noise

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Nov 23, 2013 | 05:45 PM

BillB3672

Thread Starter

Racer

Joined: Mar 2009

Posts: 361

Likes: 4

From: Chandler AZ

Rear end noise

My 2013 GS rear is making noise when making sharp turns at slow speed! I know from owning Corvettes for years that there is an additive to the rear lube that reduces this situation, but that was with my 67! Does that still apply?
The car has 5000 miles on it and this just started happening a couple of days ago.

Nov 23, 2013 | 06:02 PM

VET4LES

Team Owner

Joined: Oct 2004

Posts: 27,420

Likes: 64

From: San Clemente CA

You need to change the fluid and use Dextron Diff lube part # 88862624. 75w-90 1.8 quarts. Do a few figure eights when your done. This is a relativity new lube that has the additive added.

Nov 23, 2013 | 07:04 PM

2k Cobra

Melting Slicks

Joined: Aug 2000

Posts: 2,327

Likes: 44

From: Sacramento CA

Quote:

Originally Posted by VET4LES

You need to change the fluid and use Dextron Diff lube part # 88862624. 75w-90 1.8 quarts. Do a few figure eights when your done. This is a relativity new lube that has the additive added.

I agree, but that lube should already be installed in a new 2013 Corvette..

My 07 Z sounded like a dump truck and that lube took care of it. I think it came out in 2008..

Nov 23, 2013 | 07:14 PM

SUB VETTE

SUBVETTE

Joined: Jul 2006

Posts: 3,841

Likes: 93

From: San Diego CA

Quote:

Originally Posted by 2k Cobra

I agree, but that lube should already be installed in a new 2013 Corvette..

My 07 Z sounded like a dump truck and that lube took care of it. I think it came out in 2008..

Try doing about a dozen figure 8's with the existing lube before you dump it; if that doesn't work, change the lube.

Nov 23, 2013 | 07:17 PM

needcheese

Racer

Joined: Oct 2011

Posts: 475

Likes: 3

From: Jacksonville TX

Quote:

Originally Posted by VET4LES

You need to change the fluid and use Dextron Diff lube part # 88862624. 75w-90 1.8 quarts. Do a few figure eights when your done. This is a relativity new lube that has the additive added.

The dealership wants about $33 per quart (or the one I went to did). Most of the full synthetic 75w-90 does have the additive. RPM transmission recommended Valvoline syn power 75w-90 ($12 per quart) to put in my new diff I am getting. You need to several tightly figure 8 in both directions once you change the fluid.

Last edited by needcheese; Nov 23, 2013 at 07:31 PM. Reason: added figure 8

Nov 23, 2013 | 07:30 PM

needcheese

Racer

Joined: Oct 2011

Posts: 475

Likes: 3

From: Jacksonville TX

Quote:

Originally Posted by BillB3672

My diff had a problem when I was turning to the right sharply but not to the left slowly. I drained the fluid only see lots of metal flakes in the oil. I sent it to RPM transmissions because it is a 4.10 built diff by them. They found the problem after taking it apart. The bolts that hold the carrier together had all been stripped. RPM stated this is very rare. They also found a small hairline crack inside the case. I do give them high marks for calling and asking me if a wanted to replace the case. I will have a brand new stage 4 diff this Monday. I seriously doubt you have this problem.

Nov 24, 2013 | 10:17 AM

haljensen

Race Director

Joined: Mar 2005

Posts: 10,399

Likes: 25

From: Austin Texas

Quote:

Originally Posted by BillB3672

Take it to the Dealer!

Your Warranty can't even be a year old yet. Don't spend your $$ or time. Let the Dealer diagnose the problem while you wait or let them give you a loaner while they work on the car.