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Old 09-06-2012, 04:50 PM   #46
Junkman2008
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Quote:
Originally Posted by markmark View Post
FYI AJ, GM changed the recommendation for the type of fluid recommended for the Vette diff. I don't have the part # handy, but it isn't the Mobile 1 75\90ls any more.
Update: That change was for the C6, not the C5. Here's the TSB.



Date: 01-09-2008
TSB: #07-04-20-002A
Document ID# 2048181

2005 - 2008 Chevrolet Corvette

Subject: Rear Axle Clunk and/or Chatter Type Noise on Turns
(Drain/Refill Rear Differential Fluid) #07-04-20-002A - (01/09/2008)

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

2005-2008 Chevrolet Corvette (Including Z06 and Export)

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).

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 the differential drain plug to 35 Nm (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 the differential fill plug to 35 Nm (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

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

Parts Information:
Description: DEXRON LS Gear Oil
Part Numbers:
88862624 (US-1 Quart)
88862625 (Canada-1 Liter)

Warranty Information
For vehicles repaired under warranty, use:

Labor Operation: F9709*
Description: Drain & Refill Rear Axle Fluid
Labor Time: 0.6 hr

* This is a unique labor operation number for bulletin use only. It will not be published in the Labor Time Guide.

Copyright General Motors Corporation. All Rights Reserved.

Document ID# 2048181
2005 Chevrolet Corvette
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Old 01-10-2013, 01:15 PM   #47
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Quote:
Originally Posted by Junkman2008 View Post
ttt for you guys with the leaky butts and time on your hands during the winter.
Well I don't know if it's time on my hands or something else, but I do need to take care of this now during winter hibernation and have been searching high and low for the J-46405 tool without success. May I ask you AJ, at what temperature should I heat the oven for the Dagwood Pizza?

Errr. Edit.........I meant to ask, if you possibly had a new or recent source for the J-46405 tool? But I'll need the cooking time also..
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Old 01-10-2013, 02:06 PM   #48
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400* always worked for me
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All Corvettes are really Blue. ~"Active Handling is designed to use existing traction to assist the driver. But cannot overcome the laws of physics". NOW they tell me!!!
Old 01-10-2013, 03:54 PM   #49
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Quote:
Originally Posted by Fly03Z06 View Post
Well I don't know if it's time on my hands or something else, but I do need to take care of this now during winter hibernation and have been searching high and low for the J-46405 tool without success. May I ask you AJ, at what temperature should I heat the oven for the Dagwood Pizza?

Errr. Edit.........I meant to ask, if you possibly had a new or recent source for the J-46405 tool? But I'll need the cooking time also..
I always went with the temperature on the pizza box. Worked fine for me.

You can do this job without that seal seater. Just find one that is close to the size of the seal or do the gentle tap, tap, taparoo.
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Old 01-13-2013, 09:36 AM   #50
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Very detailed, I love it! Great thread.
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Old 09-30-2013, 04:35 PM   #51
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I'm installing spherical bearings and coilovers. This is very helpful. I did get the Kent-Moore J-42129






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Old 09-30-2013, 05:37 PM   #52
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I drove around with my axle attached to the rotor trying to find something to separate them and the bumpy ass ride in my El Camino separated them while I was driving!
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Old 10-01-2013, 03:30 AM   #53
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Nice Leaky Butt C5 output shaft oil seal replacement writeup by you Junkman.

I believe the friction plates in a C5 & C6 Corvette IRS GETRAG Differential Limited Slip Posi Unit are made of a Fiber faced material or Carbon- Carbon Fiber.
Traditional musclecar posi's & C1-C4 Corvettes used friction plates madr of Oil Quenched low carbon Alloy steel.
Then dipped in a molten cyanide salt bath to make super toygh & give anti wear properties. Similar to Kolene steels used in high performance C4&C5 700R4-4L60e-4L65E 3-4 clutch auto tranny builds.

In the past GM Limited slip additive worked best with regular Dino grade 80-90w gear oil.
Gm Posi additive wad made from super highly refined base stock oils.
And Sperm Whale oil was the active anti clutch pack chatter additive.
It worked since 1958 when GM Dana Limited Slip or Anti spin Posi 1st offered.

Well today the original Gm Limitef slip additive is hard to find.
I have to purchase from fleabay when I find it.
The 1970-80's Formulation. It was the best ever.

The later GM limited slip additive was synthesized oil.
Pretty good too. But its becoming hard to find also.
Most GM parts counterman never heard of Gm limited slip additive.
Its all about disappeared from the parts catalogs .


The new generation of GM factory gear oils are OK.
But seem to have a longterm high temp, high load bearing, durability isssue.
Stuff breaks down without notice.
Oil molecular chain unravels & breaks down to allmost water.
Posi starts chattering. Pinion & Carrier bearings fail.
Scored Ring & Pinion gear teeth.
Or you chew up the ring & pinion gearset for lunch one day after a 4K Rpm launch & powershift into 2nd gear.
But bang....never left 1st.

I noticed your using Redline shockproof gear oil Junk.
You like it ??
I have used too.
The thicker Redline shockproof gear oil 75-140w in Dana 60 Drag car rears I have built. One for 1400 Hp.
No issues.
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Old 10-01-2013, 03:32 AM   #54
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Otherwise I am a Royale Purple man.
75-140w Max Gear oil my pick in my own musclecars.
75-90w in my 87 Vert C4.
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Old 10-01-2013, 04:17 AM   #55
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I used the Red Line because it had the additive already built in and that's what my speed shop carries. I haven't noticed any difference in performance or wear. Keep in mind though that I'm busy checking out the skirts while driving instead of paying much attention to the car.

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Old 10-01-2013, 05:29 AM   #56
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Quote:
Originally Posted by Junkman2008 View Post
I used the Red Line because it had the additive already built in and that's what my speed shop carries. I haven't noticed any difference in performance or wear. Keep in mind though that I'm busy checking out the skirts while driving instead of paying much attention to the car.

Yeah.
Fill her up & Top off the Tank with some Junk & Your Loving Junkman.

Your smart.
Redline shockproof gear oil & Royal Purple Max Geat oil only 2 products I will use in my own cars & Big Bullet Proof ass Rear Ends I build.

Gm stuff is horseshit I think.
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Old 10-01-2013, 05:33 AM   #57
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Old 10-01-2013, 06:22 AM   #58
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I won't argue with you about the GM stuff because I don't even know if GM manufactures the stuff they sell.
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Old 10-01-2013, 08:02 AM   #59
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I won't argue with you about the GM stuff because I don't even know if GM manufactures the stuff they sell.
Quick answer Junk. No.
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Old 10-01-2013, 08:41 AM   #60
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Quick answer Junk. No.
I figured as much.
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