Changing Diff Fluid

Reply Subscribe

Thread Tools

Search this Thread

Sep 29, 2009 | 08:46 PM

warriorp

Thread Starter

Racer

Joined: Jun 2009

Posts: 326

Likes: 0

From: Texarkana TX

Changing Diff Fluid

I'm planning on changing my trans and diff fluids soon with Royal Purple Syncromax and Max Gear. My question is do i still need a friction additive for the diff, the bottle says its not needed. Just wondering your experiences.

Thanks,
Chuck

Sep 29, 2009 | 08:56 PM

BenC5

Drifting

Joined: Feb 2009

Posts: 1,379

Likes: 1

From: MA

I put the Royal Purple in my rear diff and added NO modifier, no issues at all.

Many on here use it and is why I went with it.

Sep 29, 2009 | 09:20 PM

user_name

Melting Slicks

Joined: Feb 2006

Posts: 2,163

Likes: 5

From: Houston

There is even a metal plate on my diff fill plug specifying that you need the limited slip additive. The owner's manual says the same thing. I use Mobole 1 LS with the additive already in it.

Sep 29, 2009 | 10:14 PM

SUPERCRUZ

Burning Brakes

Joined: Mar 2003

Posts: 1,156

Likes: 2

From: Arlington VA

Used the RP Max Gear in my rear diff about two years go. Did not add the limited slip additive and I have had zero issues. The additive is already in the gear lube. Others will disagree but just stating my experience. Good luck with it.

Sep 29, 2009 | 10:21 PM

imflyinbiya

Melting Slicks

Joined: Sep 2005

Posts: 2,307

Likes: 32

From: Trabuco Canyon CA

Quote:

Originally Posted by SUPERCRUZ

Sep 29, 2009 | 10:57 PM

CAP94

Melting Slicks

Joined: Feb 2006

Posts: 3,308

Likes: 6

From: Kentwood MI

Royal Purple already has it in the bottle. Check out the label.

Changed mine this past spring, no problems..

Sep 29, 2009 | 11:03 PM

Donkey

Instructor

Joined: Oct 2008

Posts: 200

Likes: 0

From: Murfreesboro TN

http://www.royalpurple.com/gear-oil.html

"All viscosities of Max-Gear are formulated with hypoid friction modifiers necessary for use in clutch or cone type differentials. No additional additives are necessary."

Used gear oil is one of the worst smelling fluids on the planet...