Differential Fluid: Special Edition Question - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

96/10SS · 12-08-2010, 12:07 PM

what exactly is the benefit to changing the rear diff fluid? does the car ride smoother or anything to that affect

Russell James · 12-08-2010, 01:20 PM

[QUOTE=.

Are they right and is it a warranty violation for another establishment to change out the fluid?[/QUOTE]

No, anyone can change the gear lube. Just make sure the right stuff is used. Synthetic 75w90 with limited slip additive. If you want to be extra sure you have the right stuff, just pick it up at any dealer's parts dept. The part numbers are in your owner's manual.

But a much cheaper route is Royal Purple Max Gear or Mobile 1 or .... name your favorite synthetic gear lube. I know the RP already contains the LS additive, so that makes it easy and all you need is 1 qt.

The benefit is the rear diff clutches working better with fresh lube and additive. Clutch type diffs wear out the LS additive pretty quick. They also shed a ton of clutch debris when new, which is why the old lube on a new car will look pretty mucky. If not changed, sometimes LS diffs can get noisy on turns/popping or the clutches not grabbing and giving a 1 wheel burnout.

CamaroFemme · 12-08-2010, 01:35 PM

Incidentally, I have the automatic. I wonder if the dirty fluid is manual only?

68blk/yel396 · 12-08-2010, 01:41 PM

Quote:

Originally Posted by CamaroFemme

Incidentally, I have the automatic. I wonder if the dirty fluid is manual only?

Mine is an A6 like yours !! The dirty look was very fine metal shavings, that's why it needs to be replaced and with the correct stuff to maintain warranty.

96/10SS · 12-08-2010, 02:35 PM

Quote:

Originally Posted by Russell James

No, anyone can change the gear lube. Just make sure the right stuff is used. Synthetic 75w90 with limited slip additive. If you want to be extra sure you have the right stuff, just pick it up at any dealer's parts dept. The part numbers are in your owner's manual.

But a much cheaper route is Royal Purple Max Gear or Mobile 1 or .... name your favorite synthetic gear lube. I know the RP already contains the LS additive, so that makes it easy and all you need is 1 qt.

The benefit is the rear diff clutches working better with fresh lube and additive. Clutch type diffs wear out the LS additive pretty quick. They also shed a ton of clutch debris when new, which is why the old lube on a new car will look pretty mucky. If not changed, sometimes LS diffs can get noisy on turns/popping or the clutches not grabbing and giving a 1 wheel burnout.

cool thanks and do you know if mobil 1 75w-90 ls has the additive? i think thats what the ls means lol jst not sure

Russell James · 12-08-2010, 02:41 PM

This is how they describe it on their website:

Mobil 1 Synthetic Gear Lube LS 75W-90 contains special friction modifiers designed for limited slip-type differentials. In most applications, the addition of special LS (limited slip) additives is not required. For axles requiring the highest level of limited-slip performance, OEM specific LS additives can be added to this fluid.

96/10SS · 12-08-2010, 03:05 PM

Quote:

Originally Posted by Russell James

This is how they describe it on their website:

Mobil 1 Synthetic Gear Lube LS 75W-90 contains special friction modifiers designed for limited slip-type differentials. In most applications, the addition of special LS (limited slip) additives is not required. For axles requiring the highest level of limited-slip performance, OEM specific LS additives can be added to this fluid.

so pretty much if its noisy after the mobil 1 change i should add the gm friction modifier.......

Jeff5886 · 12-08-2010, 07:13 PM

Quote:

Originally Posted by Mr_Draco

The dealer doesn't have a say when it comes to voiding a warranty. With that said, Royal Purple is NOT on GM's list of approved lubricants. If GM decides to test the lubricant (which they have been known to do in cases of failures) and finds Royal Purple in the rear diff. GM will deny the warranty claim even if your dealer put the lubricant in there.

Do you have a link to the GM Approved List for all the fluids we use?

Jeff5886 · 12-13-2010, 07:45 PM

bump

*Mr. Wyndham* · 12-13-2010, 07:55 PM

Quote:

Originally Posted by Jeff5886

Do you have a link to the GM Approved List for all the fluids we use?

Visit page 10-7 in your owners manual.

CamaroFemme · 12-17-2010, 12:47 PM

Quote:

Originally Posted by Russell James

This is how they describe it on their website:

Mobil 1 Synthetic Gear Lube LS 75W-90 contains special friction modifiers designed for limited slip-type differentials. In most applications, the addition of special LS (limited slip) additives is not required. For axles requiring the highest level of limited-slip performance, OEM specific LS additives can be added to this fluid.

You CAN tell a difference if the additive isn't used. The fifth gen SS is one of those high performance cars it is talking about in that last sentence.

hrpiii · 12-17-2010, 04:22 PM

Quote:

Originally Posted by CamaroFemme

Incidentally, I have the automatic. I wonder if the dirty fluid is manual only?

change mine at 2400 miles and lots of little shaving in there (also have A6). Change it!

CamaroFemme · 12-17-2010, 04:28 PM

Update: I had it changed last week, the mechanic said the fluid was fine. I still feel it was worth the $34 after all I've heard about dirty after-breakin differential. Wonder why some do & some don't? I broke it in *fairly* hard....oh well. It was completely worth it for peace of mind. Thanks to all.

Markwrench · 12-18-2010, 11:46 AM

According to my local GM parts pro, GM ALREADY ADDS the friction modifier to the recommended gear oil. I used AMSOIL Severe Gear 75W-90 and a bottle of modifier because it isn't specifically made for GM. Changed mine at 1500 miles,,,dirty but no shavings that I could see. Also did oil and filter at 600 miles. She is in hibernation until spring.

12-08-2010, 01:35 PM	#17
CamaroFemme Drives: 2010 Black Camaro 2SS/RS Join Date: Aug 2009 Location: USA Posts: 1,880	Incidentally, I have the automatic. I wonder if the dirty fluid is manual only? __________________ -- My boyfriend don't mind it.

12-17-2010, 04:28 PM	#27
CamaroFemme Drives: 2010 Black Camaro 2SS/RS Join Date: Aug 2009 Location: USA Posts: 1,880	Update: I had it changed last week, the mechanic said the fluid was fine. I still feel it was worth the $34 after all I've heard about dirty after-breakin differential. Wonder why some do & some don't? I broke it in fairly hard....oh well. It was completely worth it for peace of mind. Thanks to all. __________________ -- My boyfriend don't mind it.

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12-08-2010, 12:07 PM	#15
96/10SS Drives: 2010 2SS Orange w/ Grey stripes Join Date: Jul 2010 Location: SFL Posts: 372	what exactly is the benefit to changing the rear diff fluid? does the car ride smoother or anything to that affect

12-08-2010, 01:20 PM	#16
Russell James Drives: '15 SS 1LE, '69 Z28 drag car Join Date: Dec 2009 Location: Mich Posts: 4,482	[QUOTE=. Are they right and is it a warranty violation for another establishment to change out the fluid?[/QUOTE] No, anyone can change the gear lube. Just make sure the right stuff is used. Synthetic 75w90 with limited slip additive. If you want to be extra sure you have the right stuff, just pick it up at any dealer's parts dept. The part numbers are in your owner's manual. But a much cheaper route is Royal Purple Max Gear or Mobile 1 or .... name your favorite synthetic gear lube. I know the RP already contains the LS additive, so that makes it easy and all you need is 1 qt. The benefit is the rear diff clutches working better with fresh lube and additive. Clutch type diffs wear out the LS additive pretty quick. They also shed a ton of clutch debris when new, which is why the old lube on a new car will look pretty mucky. If not changed, sometimes LS diffs can get noisy on turns/popping or the clutches not grabbing and giving a 1 wheel burnout.

12-08-2010, 02:41 PM	#20
Russell James Drives: '15 SS 1LE, '69 Z28 drag car Join Date: Dec 2009 Location: Mich Posts: 4,482	This is how they describe it on their website: Mobil 1 Synthetic Gear Lube LS 75W-90 contains special friction modifiers designed for limited slip-type differentials. In most applications, the addition of special LS (limited slip) additives is not required. For axles requiring the highest level of limited-slip performance, OEM specific LS additives can be added to this fluid.

12-13-2010, 07:45 PM	#23
Jeff5886 Drives: 2011 Camaro SS 1SS w/ RS Join Date: Nov 2010 Location: Maple Hill, NC Posts: 41	bump

12-18-2010, 11:46 AM	#28
Markwrench Drives: 2011 2SS/RS ord 7-7-10 home8-24-10 Join Date: Jul 2010 Location: Baltimore Posts: 62	According to my local GM parts pro, GM ALREADY ADDS the friction modifier to the recommended gear oil. I used AMSOIL Severe Gear 75W-90 and a bottle of modifier because it isn't specifically made for GM. Changed mine at 1500 miles,,,dirty but no shavings that I could see. Also did oil and filter at 600 miles. She is in hibernation until spring.