Oil bath brake additive for gear lube?

[robert6715]

I am working on Geenie GTH1056 telehandler forklift with Spicer 213 axles. I just overhauled one of the axles. It has wet brakes that are lubed by the diff oil. The Spicer/Dana axle manual calls for SAE 80W90, GL4, MIL 1205, with "additives for oil-bath brakes".

My oil distributor (Chevron) is telling me to use limited-slip gear oil, & the Geenie dealer is telling me to just use posi additive from the auto parts store. The axle holds six gallons of oil, so like six tubes of posi additive?? I have never seen a rear diff in a truck that holds more than 5 quarts. Neither of these sounds correct to me & the last thing I want is for the brakes to squeal or be grabby.

What say you?

 

[Rand]

Chervron Supreme 80W90 LS is what the service manual calls for.

http://manuals.gogenielift.com/Parts%20And%20Service%20Manuals/data/Service/Telehandlers/1272858.pdf

page 20

looks like you need 15qt for the diff, and 2qt each the ends.

 

[robert6715]

Chervron Supreme 80W90 LS is what the service manual calls for.

http://manuals.gogenielift.com/Parts%20And%20Service%20Manuals/data/Service/Telehandlers/1272858.pdf

page 20

looks like you need 15qt for the diff, and 2qt each the ends.

Thanks, Looks like limited slip gear oil it is. That manual will come in handy going forward.

 

[ironman_gq]

A wet brake is basically the same mechanism as the clutches in a posi or the wet clutch in a motorcycle or a tractor. It's a friction material creating friction against a steel disc. If they're telling you to use LS additive or an LS fluid then that's what I'd use.