'07 diff warranty work?

[Ken Erickson]

I really need to get my '07 diff looked at. The clutch packs are making so much noise my neighbors are starting to talk - louder - when I back out of my driveway. Planning on taking it to - cough - Courtesy - cough. Is there any TSB's that I should be aware of? What's the normal service for this kind of problem? Do they first replace the fluid? Or if it's bad enough do they go ahead and replace the clutch pack and fluid? I really don't want to have to go back and forth on this. I would like to have it fixed the first time. TIA.

[RichieRichZ06]

Originally Posted by Ken Erickson

I really need to get my '07 diff looked at. The clutch packs are making so much noise my neighbors are starting to talk - louder - when I back out of my driveway. Planning on taking it to - cough - Courtesy - cough.

Is there any TSB's that I should be aware of? What's the normal service for this kind of problem? Do they first replace the fluid? Or if it's bad enough do they go ahead and replace the clutch pack and fluid? I really don't want to have to go back and forth on this. I would like to have it fixed the first time.

TIA.

There is a brand new fluid out for the rear ends on the C6's. It was released last month and really does work to silence the clutch packs. The new fluid does not require the additive like the old stuff did. If you would like to bring it up here, I can take care of you. If they know nothing about it at the other dealer you go to then here is the part number for the updated fluid. GM# 88862624
RICH

[csun213]

Originally Posted by RichieRichZ06

There is a brand new fluid out for the rear ends on the C6's. It was released last month and really does work to silence the clutch packs. The new fluid does not require the additive like the old stuff did. If you would like to bring it up here, I can take care of you. If they know nothing about it at the other dealer you go to then here is the part number for the updated fluid. GM# 88862624
RICH

Would this apply to 2006 or just 2007?

[RichieRichZ06]

Originally Posted by csun213

Would this apply to 2006 or just 2007?

2005-2008 Corvette and XLR

[csun213]

Originally Posted by RichieRichZ06

2005-2008 Corvette and XLR

Thanks.

[Ken Erickson]

Originally Posted by RichieRichZ06

There is a brand new fluid out for the rear ends on the C6's. It was released last month and really does work to silence the clutch packs. The new fluid does not require the additive like the old stuff did. If you would like to bring it up here, I can take care of you. If they know nothing about it at the other dealer you go to then here is the part number for the updated fluid. GM# 88862624
RICH

Thanks Richie.

[RichieRichZ06]

Originally Posted by csun213

Thanks.

Originally Posted by Ken Erickson

Thanks Richie.

My pleasure guys!

[Inky Pinky]

So I just tell the dealer I'm hearing a noise and that there is a SB, and they'll replace the juice?

[RichieRichZ06]

Originally Posted by Inky Pinky

So I just tell the dealer I'm hearing a noise and that there is a SB, and they'll replace the juice?

Yeppers. In case you really want to be armed and ready, the TSB # is #07-04-20-002A:

here is a copy if you like:

Subject: Rear Axle Clunk and/or Chatter Type Noise on Turns (Drain/Refill Rear Differential Fluid)

#07-04-20-002A: Rear Axle Clunk and/or Chatter Type Noise on Turns (Drain/Refill Rear Differential Fluid) - (Jan 9, 2008)

Models: 2004-2008 Cadillac XLR (Including V-Series and Export)

2005-2008 Chevrolet Corvette (Including Z06 and Export)




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This bulletin is being revised to change the fluid recommendation and to remove the requirement of adding friction modifier. Please discard Corporate Bulletin Number 07-04-20-002 (Section 04 -- Driveline/Axle).


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Condition
Some customers may comment on a clunk and/or chatter type noise from the rear of the vehicle while making turns.

Cause
This condition may be caused by slip/stick of the posi-traction clutch plates due to insufficient limited-slip axle additive. As plates slip and stick, a jumping or jerking feel occurs accompanied by a clunk noise.

Correction
Important: DO NOT remove the differential cover from the rear or the two sides. It is not necessary to flush the old fluid from the differential.

Drain and refill the rear differential fluid using the procedure listed below.

Draining Procedure




Raise and support the vehicle.
Clean any dirt from around the differential drain plug.
If not equipped with a differential cooler, remove the drain plug (1) and washer (2) from the differential.



If equipped with a differential cooler:
4.1. Using a bent tip screwdriver, remove the quick connect fitting retaining ring (3) from the quick connect fitting (4) and discard the retaining ring.

4.2. Remove the differential cooler inlet pipe from the differential nut.

Drain the fluid.
Filling Procedure




If not equipped with a differential cooler, install the drain plug (1) and washer (2) to the differential.
Tighten
Tighten the differential drain plug to 35 N·m (26 lb ft).





If equipped with a differential cooler:
2.1. Install a new retaining ring.

2.2. Connect the differential cooler pump inlet pipe (2) to the differential. A distinct snap should be heard or felt when assembling the cooler pipe to the fitting.

2.3. To ensure the cooler line is properly installed, give the cooler pipe a gentle pull.

Clean any dirt from around the differential fill plug.
Remove the fill plug and washer from the differential.
Important: DO NOT add any limited-slip additive (friction modifier). With this new fluid (Dexron LS Gear Oil 75W-90) it is no longer required to add friction modifier. If friction modifier is added, it will cause the fluid to lose some of it's friction reducing properties as well as reducing seal life.

Fill the differential with the new DEXRON® LS gear oil, P/N 88862624 (Canadian P/N 88862625). Refer to the table listed below for lubrication specifications.
Check the fluid level to ensure it is even with the bottom of the fill plug hole to no lower than 6 mm (0.25 in) below the opening.
Install the fill plug and washer to the differential.
Tighten
Tighten the differential fill plug to 35 N·m (26 lb ft).

Important: Steps 8-13 are for vehicles equipped with the differential cooling system. For vehicles not equipped with the cooling system, proceed to step 14.

Raise the vehicle so the wheels are about a foot off the floor. Make sure the wheels can spin freely without obstruction from the hoist or any nearby items.
Start the vehicle and put the transmission in second gear. Slowly accelerate to 10 mph and hold this speed for one minute.
Turn the vehicle off .
Raise the vehicle.
Check the fluid level in the differential. Add fluid until the recommended level is reached.
Lower the vehicle.
Once the differential fluid has been changed, the vehicle must be driven in 8-10 tight figure eight maneuvers to heat the fluid and allow the fluid to be worked into the clutch plates.
Lubrication Specifications Application
Quantity

Metric
English

2004-2005 XLR (Including Export) and 2005 Corvette (Non Export)
1.72 liters
1.85 quarts

2006-2008 XLR (Including V-Series and Export) and 2006-2008 Corvette (Non Z06)(Non Export)
2.0 liters
2.11 quarts

2005 Corvette Export
1.88 liters
1.99 quarts

2006-2008 Corvette Export (Non Z06)
2.16 liters
2.28 quarts

2006-2008 Corvette Z06
2.75 liters
2.91 quarts

[Inky Pinky]

Thank you sir.

I'm thinking of bringing it to you. I'll need 15k service, tires mounted, alignment, fix my loose driver's seat.

[RichieRichZ06]

Originally Posted by Inky Pinky

Thank you sir.

I'm thinking of bringing it to you. I'll need 15k service, tires mounted, alignment, fix my loose driver's seat.

We are your one stop shop. How are you bringing tires to mount if you will be driving the Vette?

[Inky Pinky]

Originally Posted by RichieRichZ06

We are your one stop shop. How are you bringing tires to mount if you will be driving the Vette?

That's the dilema. Maybe I can put the top down?? j/k

[46490]

Did they start using the new fluid in the 2008s and if so when - mine was built 20 Feb 08