[leejoy]

hi

just finished the GM 10-bolt upgrade and threw a richmond gear and an Eaton Posi Differential back there.

which gear lube should I use?

I still have the C-Clip type axles and axle housing seals.

thanks.

lee

[Henry Highrise]

I use 80W90 gear oil with a bottle of Richmond Gear Posi-traction additive in mine.

[grandpaws 57]

I ran my 12 bolt with syn.90w.Many passes,still works good.

[xntrik]

[Notes from Eaton on their at http://www.torquecontrol.eaton.com/p...cs/index.html]

.........The bias torque of the differential increases in proportion to the input torque. Pyrolytic carbon with a texture of cloth is bonded to steel discs. These discs are then alternated with non-patterned steel discs creating a clutch pack that's virtually indestructible under abusive testing and operation. Due to the texture of the carbon discs, special lubrication requirements are eliminated and there are none of the chatter or noise problems associated with paper and steel friction materials.

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Automatic Locking Differential Lubricants. [Note from Michael Asmussen, Torque Control Products Division of Eaton Corp.] We recommend the following lubrications for our locking differentials:
1)Texaco 2276; Synthetic 75 W90; Gm Part # 9986115
2)Texaco 9622; Mineral based 80W90; GM Part # 9985290
3)Texaco 2080; Synthetic 75W140 (heavy duty applications); GM part # 9985991
Note - All of the above lubes are preblended with friction modifier. No additional modifiers are necessary or recommended. As far as other lubes are concerned, any standard GL 5 lube will work, but the units perform optimally with the three listed above.
[Comment from Castrol:] Thank you for contacting Castrol regarding Syntec 75W-90 GL-5 gear oil in your Volvo differentials with an Eaton Automatic Lock. You may use SYNTEC gear oil with full confidence.
[Comment from Mobil:] Mobil 1 Synthetic Gear Lubricant meets the GL-3, GL-4 and GL-5 API ratings. If the manufacturer requires the use of a GL-4 rated lubricant ONLY, then you should not use Mobil 1 Synthetic Gear Lubricant.

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[xntrik]

http://www.traction.eaton.com/prod6.htm

Quote from the FAQ page:

What type of lubricant and limited slip additive should I use with my newly purchased Eaton Limited Slip Differential?

Eaton strongly recommends utilizing an API-GL5 approved Mineral-Based 80W-90 Axle Lubricant and one 4-oz bottle of Limited Slip Additive (GM or Ford).

[xntrik]

How's that for confusing information from the same company?

I guess if your Eaton differential has the "priolytic carbon with a texture of cloth" clutches you don't need the added posi lube.

So are we to conclude that Eaton makes different limited slip disc materials?

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from Eaton's site:

http://www.traction.eaton.com/prod3.htm

Eaton's Posi Limited Slip Differential

"Formula One race-bred carbon friction discs for lifelong, chatter-free operation."

"carbon disc clutch packs preloaded by a central spring assembly are located behind each differential side gear."


Lube ?