Diff Fluid question - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

adub · 08-27-2010, 08:39 PM

I changed my diff fluid at 5700 miles, it was nasty with lots of shavings on the magnets. I replaced it with 1 quart of Mobil 1 75W-90 which includes LS additive. I noticed that that car groaned during low speed turns, so I turned around and went home. Drove maybe two miles. Bought a bottle of GM LS additive and put about 1.5 ounces in. Drove the same two mile course and it doesn't groan, but it whines now. Whats the deal, doesn't seem like anyone else has had any trouble with non GM diff fluid?

Rob191288 · 08-27-2010, 09:10 PM

Royal Purple is what I put in mine, nothing wrong with it at all.

Mr_Draco · 08-27-2010, 09:36 PM

Quote:

Originally Posted by adub

Whats the deal, doesn't seem like anyone else has had any trouble with non GM diff fluid?

When I asked my dealer for a bottle of GM's diff fluid they pulled out a bottle of Mobil 1.

adub · 08-27-2010, 10:14 PM

Quote:

Originally Posted by Mr_Draco

When I asked my dealer for a bottle of GM's diff fluid they pulled out a bottle of Mobil 1.

HA! It only does it at low speeds, like parking, so I dont think its too serious. I'm thinking I may try to find some 75W-90 without LS and then use the GM additive.

Russell James · 08-27-2010, 10:48 PM

Royal Purple Max Gear 75w90. Needs nothing else added. Or the GM lube with adding the GM additive. I wouldn't mix and match something that already has an additive and then add more additive. RP works great, I'd go with that.

Then go to a parking lot and do about 10 slow figure 8's. That works the additive into the clutches. If it still whines or groans after that, something is boogered up.

adub · 08-30-2010, 08:43 AM

Quote:

Originally Posted by Russell James

Then go to a parking lot and do about 10 slow figure 8's. That works the additive into the clutches. If it still whines or groans after that, something is boogered up.

That quieted it down, thanks

clg_98ta · 09-02-2010, 12:29 PM

Yep, you always need to drive tight circles in both directions (or figure 8's) after changing the diff oil. That's very important, you can damage the differential if you forget this step.

molsonbrador · 09-02-2010, 07:56 PM

adub, now that you're good can I threadjack? If so I want to ask why people are changing diff fluid so early? I see you said you had shavings, anyone else?
thanks.

Moriartii · 09-03-2010, 08:58 AM

Yeppers I changed mine and had crap on my plug and such as well.
Cheers
K

hypurone · 09-03-2010, 10:07 AM

Quote:

Originally Posted by molsonbrador

adub, now that you're good can I threadjack? If so I want to ask why people are changing diff fluid so early? I see you said you had shavings, anyone else?
thanks.

Changed mine at 2500 (I'm anal about changing fluids after a "break-in" period). No, there is no "break-in" period defined by GM but I have been around long enough (was a tech for 20+ years) and had enough vehicles to see it all. Cheap insurance and you know that the fill level is correct!

No shavings but the fluid was silvery. Looked almost like liquid silver! There was fine silver powder only on the drain plug....

08-27-2010, 08:39 PM	#1
adub Drives: Shopping Join Date: Feb 2010 Location: Houston Posts: 145	Diff Fluid question I changed my diff fluid at 5700 miles, it was nasty with lots of shavings on the magnets. I replaced it with 1 quart of Mobil 1 75W-90 which includes LS additive. I noticed that that car groaned during low speed turns, so I turned around and went home. Drove maybe two miles. Bought a bottle of GM LS additive and put about 1.5 ounces in. Drove the same two mile course and it doesn't groan, but it whines now. Whats the deal, doesn't seem like anyone else has had any trouble with non GM diff fluid? __________________ ______________________ 2010 2SS RS Auto - Black 1970 Chevelle SS 396

09-02-2010, 12:29 PM	#7
clg_98ta Drives: 2010 Camaro 2SS Join Date: Jan 2010 Location: Austin, TX Posts: 2,698 View My Garage	Yep, you always need to drive tight circles in both directions (or figure 8's) after changing the diff oil. That's very important, you can damage the differential if you forget this step. __________________ Black 2SS ordered 1/4/2010, received 2/19/2010

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08-27-2010, 09:10 PM	#2
Rob191288 Drives: 2010 Camaro LS Join Date: Jun 2010 Location: Andrews AFB, MD Posts: 586 View My Garage	Royal Purple is what I put in mine, nothing wrong with it at all.

08-27-2010, 10:48 PM	#5
Russell James Drives: '15 SS 1LE, '69 Z28 drag car Join Date: Dec 2009 Location: Mich Posts: 4,482	Royal Purple Max Gear 75w90. Needs nothing else added. Or the GM lube with adding the GM additive. I wouldn't mix and match something that already has an additive and then add more additive. RP works great, I'd go with that. Then go to a parking lot and do about 10 slow figure 8's. That works the additive into the clutches. If it still whines or groans after that, something is boogered up.

09-02-2010, 07:56 PM	#8
molsonbrador Drives: 2010 Camaro SS, 2018 Colorado Join Date: Nov 2009 Location: NC Posts: 2,207	adub, now that you're good can I threadjack? If so I want to ask why people are changing diff fluid so early? I see you said you had shavings, anyone else? thanks.

09-03-2010, 08:58 AM	#9
Moriartii Drives: 11 IOM 2SS/RS M6 w/Hurst Join Date: Nov 2009 Location: Austin Texas Posts: 1,269	Yeppers I changed mine and had crap on my plug and such as well. Cheers K