what is best gear oil to use on old eaton drive?

[BobinCovington]

I have my old Eaton series sixteen outdrive on my 1966 16 Ski Sporter and yes it still runs fine. The manual calls out for "a first grade, heavy duty gear oil, SAE 90 weight, containing Sulphur-Chlorine-Lead additive - or Eaton p/n L-100"

Anyone have some idea of what to use these days? I don't mind paying for whatever is the best.

[BobinCovington]

Still in process of doing some looking and Amsoil, Redline and Torco all have Gear Oils they recommend, but they don't specifically know compatibility for the Eaton unit. I was reading that the cone-clutch may need specific properties, but I have the clutch dog? in the eaton. So I am still making phone calls and inquiries on this one...

[mrfixxall]

From what i hear the redlind shock proof is the best on the market..

[MOP]

I serviced some Eatons years back, one of the most important add-ons is a shower. The uppers get very hot due to inadequate oil circulation, keep them cool they will run a long time.

[Tony]

I serviced some Eatons years back, one of the most important add-ons is a shower. The uppers get very hot due to inadequate oil circulation, keep them cool they will run a long time.

2010 - 1966 = a long time!

[BobinCovington]

LOL...that's what I was going to say. It has been going a long time for that drive to keep running, but maybe a shower would have extended it to a really long time.

I am considering the redline along with Torco and Amsoil, but just want to know for sure what is proven to be okay to use.