2003 Backing up problem

[Frederick W.]

For about eight months now while backing for any reason , turning the wheel to the left a little or a lot the front tires act and feel like they are not turning momentarily, then releasing until the back up turn is complete. It does not do it going forward, it does not do it turning to the right. I was told the differential could be low , I did need to add fluid however that did not correct the problem, yes one could also think the posi-traction was sticking. Winter is coming time to work on these problems. Thank You so much Fred PS to all you great people with advice on the parasitic draw, I am closing in on it Thank You

[John D.]

Re: 2003 Backing up problem

Here's a GM service bulletin that may apply to your car..

#PIP3559G: Rear Axle Chatter Shudder On Turns - keywords bind differential PIP3559 PIP3559A PIP3559B PIP3559C PIP3559D PIP3559E PIP3559F PIP3559G - (Jul 8, 2008)

Subject:	Rear Axle Chatter Shudder on Turns
Models:	1999 - 2004 Chevrolet Corvette, Corvette Z06

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This PI was superseded to remove model years and update recommendations. Please discard PIP3559F.

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The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:Rear axle chatter or shudder on turns on Chevrolet Corvette.
[COLOR=blue !important]Note: For 2005 and newer Corvette or 2004 and newer Cadillac XLR reference the latest version of TSB 07-04-20-002.

Recommendation/Instructions:

• Drive vehicle up to operating temperature, drain and refill the rear axle with synthetic axle lubricant GM P/N 89021677 (Canadian P/N 89021678) and appropriate amount of the friction modifier additive P/N 01052358 (in Canada 992694). See fluid amounts listed below.[COLOR=blue !important]Note: In some cases it has shown that a second drain and refill procedure on a second repair visit will correct the chatter/shudder concern prior to replacement of the clutch packs
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• If the complaint or the condition persists after the flush and fill, replace the right and left rear axle clutch packs following published service procedures.
• After clutch pack replacement use synthetic axle lubricant GM P/N 89021677 (Canadian P/N 89021678). and the appropriate amount of friction modifier additive P/N 01052358 (in Canada 992694). See fluid amounts listed below.[COLOR=blue !important]Note: PRIOR TO INSTALLING THE FRICTION MODIFIER ADDITIVE FOR EITHER OF THE ABOVE REPAIRS THE BOTTLE MUST BE SHAKEN VIGOROUSLY FOR AT LEAST 1 MINUTE TO MIX THE ADDITIVE THOROUGHLY.
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• Once the axle fluid has been changed the car must be driven in 8 - 10 SLOW figure eights to work the fluid between the clutch plates.

Fluid capacity:

1999-2004	Corvette ALL	1.69 qt (1.6L)	4 oz. (118 ml)

[COLOR=blue !important]Note: Export vehicles use 2.01 l (2.12 qt) synthetic axle lubricant GM P/N 89021677 (Canadian P/N 89021678) and approximately 150 ml (5.1 oz) limited-slip differential lubricant additive GM P/N 1052358 (Canadian P
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