Eaton rear end gear oil

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Eaton rear end gear oil

August 06, 2015, 01:22:44 pm

Anyone happen to know what weight oil goes in my 1989 Eaton 4:33 differential! I can't find any info in any of the documents that came with the coach.
I have 75W-90 and 85W-140 gear oil (limited slip) here at home.

Re: Eaton rear end gear oil

Reply #1 – August 06, 2015, 02:07:04 pm

For the temperature range we normally operate in 75W-90 synthetic will work OK.

Keith

Re: Eaton rear end gear oil

Reply #2 – August 06, 2015, 02:26:45 pm

^ i agree. Based on the temp charts in the book, any 75w-90 or 80w-90 would be perfectly fine. Id always recommend a synthetic. Cheap insurance.

Re: Eaton rear end gear oil

Reply #3 – August 06, 2015, 02:33:33 pm

Thanks for the replies. Leaving in the early AM so will check the level, add 75W-90 limited slip oil until we get back, then see about draining & replacing with synthetic oil.
Thanks again.

Norm

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