Differential Fluid?

**shlby123** · 03-12-2007, 10:43 AM

How do you add it to your car?

**Rick99TAWS6** · 03-12-2007, 10:56 AM

Fill plug is on the passenger side of the car directly in front of the rear axles at the pumpkin - use a 3/8 drive extension to screw it out and fill till it flows back out

**shlby123** · 03-12-2007, 11:50 AM

pretty cool. Thank you!

**2001NBMZ28** · 03-12-2007, 12:44 PM

Also make sure the car is level when filling.

**1BADDLS1** · 03-12-2007, 12:49 PM

Verify that the axle lubricant level is within the following range:

No higher than the bottom of the plug opening
No lower than 15 mm (9/16 inch) below the plug opening
If necessary, add to or replace the axle lubricant. Use synthetic 75W-90 gear lubricant (GM P/N 12378261), meeting GM specification 9986115, or equivalent.

If the vehicle has a limited slip differential, add 118 ml (4 fl oz) of limited slip differential additive (GM P/N 1052358), or equivalent

**shlby123** · 03-12-2007, 12:51 PM

Im assuming the diff. fluid is the lubricant right?

**9t8z28** · 03-12-2007, 03:09 PM

Originally Posted by shlby123

Im assuming the diff. fluid is the lubricant right?

Yes, its the lubricant.

**CandyRedZ28** · 03-12-2007, 06:27 PM

What weight to use and will royal purple be the differential fluid?? I have never changed it on my 81k Camaro and was wondering if it would be worth to change it.

**LS2Tuner** · 03-12-2007, 11:19 PM

Originally Posted by CandyRedZ28

What weight to use and will royal purple be the differential fluid?? I have never changed it on my 81k Camaro and was wondering if it would be worth to change it.

Yes I would..... Royal Purple's is called Max-Gear. It's not # like plain jain fluid. You will gain gas milage do to loss of friction. And even better yet there is NO need to add any friction modifier cause it already has it.

Heres a link if you want proof of the truth.....
http://www.royalpurple.com/prodsa/mgeara.html

**0rion** · 03-13-2007, 06:27 PM

I'm gonna have to hunt it up again to be completely positive but I think rears with clutch type posi's aren't recommended synthetics. I think you can run synthetic in the cone types but not the clutch types. I know my strange rear is not recommended to run synthetics.

**CandyRedZ28** · 03-13-2007, 08:20 PM

So what do i got, mine is a 98

**LS2Tuner** · 03-13-2007, 09:11 PM

Originally Posted by 0rion

I'm gonna have to hunt it up again to be completely positive but I think rears with clutch type posi's aren't recommended synthetics. I think you can run synthetic in the cone types but not the clutch types. I know my strange rear is not recommended to run synthetics.

Stock GM clutch type are ok with sythetics. They call for a GL-5 type oil. Or at least everyone I've ever dealt with has.
This is from R.P.
"Max-Gear is recommended for use in truck, motor home / RV, and automotive front or rear differentials, manual transmissions and lower gear units of marine engines that specify use of an API GL-5 or GL-4 fluid."

"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."

**jess** · 03-13-2007, 11:19 PM

I would change it ASAP.

It is great insurance, and the rear ends in these cars are weak to begin with.
I'm just about to buy a rear end cover that has a drain plug in it so fluid changes can be easy. SLP offers one and I believe a company that sells Trans-am parts has a good one as well. (don't know the name of this co.)
Good peace of mind to have new fuild in her .

All the best to you.

jess .........