Differential Lube addative? - ZR-1 Net Registry Forums

Ccmano · 03-04-2010

I'm about to swap in the new 4.10 pumpkin next week and getting all my misc. supplies ready.

I've read that the new synthetic differential lubes like Mobile 1 and Amsoil do not require the clutch addative from GM? Can anyone confirm this? Any experience out there of running these lubes without the addative? Or should I just play it safe and get the stuff from GM.

Any special gasket cement for the cover or will RTV work?

Any other tips?
Thanks

H

rebelz · 03-04-2010

On the Mobil 1 web site, it says that their LS 75W90 gear oil contains friction modifiers for use in limited slip differentials... I used the lube, I added a bottle of the GM stuff when I did the service last spring. No issues, 12,000 miles normal & spirited driving, including drag racing and autocross.
The other one I can't speak about, as I don't know.
Rich

Pete · 03-04-2010

Hans,add the additive (1 bottle)
Last year i went with Amsoil and they also mention no additive needed but it did,the rear end was crowling for it

i put in one bottle and all is quiet again.

Now i always have it on hand,come by and pick one up.

Oh i forgot you moved away far far away.

Pete

Jagdpanzer · 03-04-2010

I also use the Mobil 1 synthetic rear end oil and the GM additive.
Not sure if its really needed but felt it wasn't worth the gamble nor did I want deal with hassle of putting it in later.

flyin ryan · 03-04-2010

I used GM's Dexron, no additive.

xlr8nflorida · 03-04-2010

Quote:

Originally Posted by Jagdpanzer

I also use the Mobil 1 synthetic rear end oil and the GM additive.
Not sure if its really needed but felt it wasn't worth the gamble nor did I want deal with hassle of putting it in later.

I have Mobil 1 as my rear end oil.

Gordon K. suggests 2 bottles of GM additive.

Per Mobil it should be fine with no additive however, I added 1 bottle in my car.

03-04-2010	#1
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Differential Lube addative? I'm about to swap in the new 4.10 pumpkin next week and getting all my misc. supplies ready. I've read that the new synthetic differential lubes like Mobile 1 and Amsoil do not require the clutch addative from GM? Can anyone confirm this? Any experience out there of running these lubes without the addative? Or should I just play it safe and get the stuff from GM. Any special gasket cement for the cover or will RTV work? Any other tips? Thanks H __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold.

03-04-2010	#2
rebelz Join Date: Jul 2007 Location: Anchorage, AK Posts: 106	Re: Differential Lube addative? On the Mobil 1 web site, it says that their LS 75W90 gear oil contains friction modifiers for use in limited slip differentials... I used the lube, I added a bottle of the GM stuff when I did the service last spring. No issues, 12,000 miles normal & spirited driving, including drag racing and autocross. The other one I can't speak about, as I don't know. Rich __________________ REBelZ '92 ZR-1 Yellow/Black #031

03-04-2010	#3
Pete Join Date: Dec 2003 Location: Chicagoland,IL Posts: 2,679	Re: Differential Lube addative? Hans,add the additive (1 bottle) Last year i went with Amsoil and they also mention no additive needed but it did,the rear end was crowling for it i put in one bottle and all is quiet again. Now i always have it on hand,come by and pick one up. Oh i forgot you moved away far far away. Pete __________________ '91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage

03-04-2010	#4
Jagdpanzer Join Date: Apr 2007 Location: Northern VA Posts: 2,663	Re: Differential Lube addative? I also use the Mobil 1 synthetic rear end oil and the GM additive. Not sure if its really needed but felt it wasn't worth the gamble nor did I want deal with hassle of putting it in later.

03-04-2010	#5
flyin ryan Join Date: Aug 2006 Location: Edmonton, Alberta or Phoenix, Arizona Posts: 2,741	Re: Differential Lube addative? I used GM's Dexron, no additive. __________________ There are no limit's mans ingenuity, just as mans ingenuity will never conquer the forces & behavior of this planet...Smokey Y.