EP Gear Oil??

[metroplex]

Are Extreme Pressure gear oils required/recommended for Torsen differentials?

I was reading Prof. Overdrive's response to someone's question in the recent Summit catalog... and he recommended Lakewood's 80W-90 gear lube and mentioned it was an EP clutch-type gear lube.

I'm currently using Redline 75W-90 in my Ford 8.8" that has a Detroit TrueTrac (Torsen) and Redline 80W-140 in my Dana-60 (9.75") that has a Traction-Lok clutch differential.

Should I switch to something that has EP agents? Or does Redline already use a decent amount?

I want to reduce wear as much as possible, but the vehicles are not driven off-road nor do I apply any high shock or loads other than aggressive driving and occaisonal drag racing (auto transmissions, street tires).

 

[MolaKule]

Why would you think that Redline doesn't have EP agents?

All EP gear lubes have the GL5 EP protection additive package, including Redline and Specialty Formulations.

 

[metroplex]

That's what I figured, but reading Redline's description for their regular 75W-90 and then reading their Shockproof stuff seems to indicate the 75W-90 (regular) doesn't have EP agents.

 

[MolaKule]

Apologize for the misread there metroplex.

Sometimes the manufacturers get TOO wordy and flood you with too much extraneous info.

All gear lubes have EP and Anti-wear additive packages. The shock-type lubes generally have more calcium and silicone additives, and start with heavier (higher viscosity) base oils.

 

[Bror Jace]

MolaKule, from the description of Red Line's shockproof oils, it sounds like they use a fair amount of molybdenmum disulphide. I'm pretty sure they describe it as as 'suspended solid.'

That's an EP additive my anyone's definition.

--- Bror Jace

 

[MolaKule]

quote:

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from the description of Red Line's shockproof oils, it sounds like they use a fair amount of molybdenmum disulphide. I'm pretty sure they describe it as as 'suspended solid.'

That's an EP additive my anyone's definition.

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While moly disulfide could be the EP ingredient, so could the calcium or even the boron. SInce most people have described the shockproofs as a "milky" looking fluid, I would go for the calcium and then boron.