What oil to the axel?

[HEATSEEKER]

Hello!

I'm going to change oil in the rear axel and woundering which oil to use?
In my supra i used "Castrol Differential SAF-X"
Can i use same oil in the Buick?
What typ of rear axel is it in my Buick? lamell?

Thanks!
Jakob

 

[DailyDrifter]

I put regular 80-90 in and added GM posi additive JMO. Some guys use royal purple.

Your rear should be a 8.5" 10 bolt.

 

[turbojd]

I put regular 80-90 in and added GM posi additive JMO. Some guys use royal purple.

x2 same here

 

[SCOOBY DOO]

I put regular 80-90 in and added GM posi additive JMO. Some guys use royal purple.

Your rear should be a 8.5" 10 bolt.

X 3

 

[HEATSEEKER]

X 3

Okej, what brand is it? any link?
How much do i need?

Edit: I don´t think i can get any "GM posi additive JMO" here in sweden...?!

 

[DailyDrifter]

Any brand will do I suppose, Just look for 80-90w gear lube, and GM posi addative (should be in a tube)

 

[mikestertwo]

I use the differential oil from GM along with the additive.

 

[03FatBoy]

Royal Purple

Link to Summit Racing:

Royal Purple RP01300 - Royal Purple Max-Gear Synthetic Gear Oil - summitracing.com

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.

 

[HEATSEEKER]

Link to Summit Racing:

Royal Purple RP01300 - Royal Purple Max-Gear Synthetic Gear Oil - summitracing.com

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.

Thanks!
I will try to find that oil here in Sweden.
What kind of differential do i have??

 

[wile87]

you can use lucas oil rear lube. no need to use the additive in it. it's formulated for use in positraction rears

 

[79TurboCutlass]

Thanks!
I will try to find that oil here in Sweden.
What kind of differential do i have??

It should be an 8.5 10 bolt made by GM. At least that is what the original equipment here in the states was.

 

[mousemobile]

I worked for an axle manufacturer (albeit Ford). You can use any high quality axle lube. It should meet API GL-5 spec for lubrication. Standard lube will work well. Synthetic lube works well with reduced friction (better fuel mileage, MAYBE more power to the wheels). Ford uses synthetic fluid as factory fill in all of their rear wheel drive applications.

If you have limited slip differential, use limited slip addidtive from GM or Ford. I'm not sure if any other additive brands are as good.

The additive is some nasty stuff. I read the MSDS. We soaked clutches in 100 gallon tanks prior to assmebling limited slip differentials. Smelled nasty, too.

HTH, Dimitar