Wnts2Go10O

iTrader: (12)

what weight and brand do u use? the oil in the ss's rear should be changed so i wanna see wht everyone runs.

SteveC

I use Mobil dyno oil 85W140, it is $8.99 a gallon at Kreagen.

SteveC

GT Griller

iTrader: (8)

I use castoral 75-140 with my richmonds.

GM Muscle

iTrader: (9)

I just did alittle preventative maintenance on my 10 bolt and I used Redline's Heavy Shockproof oil (comprable to about a 75W250). The rear is now dead quiet unlike it used to be. I only have about 100 miles on it but it seems to be working out well.

SStheBest

iTrader: (2)

i use mobil1 75-90w...no problems here

stoker420

can you use that redline stuff with an Aurburn posi?

Wnts2Go10O

iTrader: (12)

y wouldnt u be able to?

GM Muscle

iTrader: (9)

As long as you use limited slip additive with it I don't see why not. For some reason alot of guys have been straying away from synthetic, not sure of the exact reason. The only reason I went with the shock proof is because it makes a nice cusion between the ring and pinion and will hopefully help save the rear when I hit it hard.

SteveC

Do NOT use synthetic lube with the Auburn unit, only the Zexal Torson.

SteveC

ace68

iTrader: (15)

How come steve can you explain, is it the way the Auburn grabs the side of the unit?

mzoomora

iTrader: (36)

Clutch and cone style posi units work of of friction. The synthetic fluid changes the way the cones react with the sides of the case, and in some cases makes the not function at all. There will always be somebody who has said they have done it, but it is a bad idea.

stoker420

so anyone want to buy my 2 qts of heavy shockproof gear oil from redline?

SteveC

"mzoomora" has said it all.

I run the thicker dino 85W140 in my Zexal-Torson because it is MUCH less expensive than synthetic ($8.99 a gallon), and the heavier oil disapates (sp) the heat faster due to thicker molicules (sp). I have 3.73:1 rearend gears.

SteveC

01_SuperSlow

iTrader: (7)

I use Redline 75W90

Red99TransAm

What about for the stock rear end? Im kind of new here and trying to learn, so please bear with me through my dumb questions. Thanks.

Black Plague

iTrader: (13)

I run Royal Purple Max Gear 75W90 with a bottle of GM limited slip additive on stock rear Get a girdle a stud kit it will help just dont dump the clutch to hard and it will last on the street

WS-Sick

Did you use the additive with that oil and would you recommend that for a daily driver with a whiney rear?

GM Muscle

iTrader: (9)

Techincally since the Torsen is a spider gear set-up you don't need the additive. I had some kicking around so I dumped it in anyway. I have probrably 500-600 miles on the rear and it's still quiet. I'm not sure how it will hold up in the long run but things are looking good for now.

Humvee z28

according to GM you should use a 75-90w full synthetic with 4 ounces of limited slip additive, as per the manual.

WS-Sick

Thanks for the replies. I just want to quiet down this rear a bit. I plan on getting a 12-bolt this summer but I just can't stand the whine.