One question on TC oil options

[Ol'Blue]

Rebuilding my transfer case in a couple months and read a few threads on recommend oils and what I found is either 50w oil or 75w-90 gear oil. Any problem running this 80w-90? That’s what Yukon recommends for my LS diff and would be nice to keep it simple.

Thanks

 

[Oldtimer]

GL-5 may not play well with bronze thrust washers in D-20 transfer case?


SPECIFICATIONS, APPROVALS AND RECOMMENDATIONS: Meets or exceeds API GL-5, API MT-1, SAE J2360, MIL-PRF-2105E, MACK GO-J, PG-2 Limited Slip.

 

[Ol'Blue]

GL-5 may not play well with bronze thrust washers in D-20 transfer case?


SPECIFICATIONS, APPROVALS AND RECOMMENDATIONS: Meets or exceeds API GL-5, API MT-1, SAE J2360, MIL-PRF-2105E, MACK GO-J, PG-2 Limited Slip.

You’re right! I called Lucas to double check and it could harm the brass. Out to find some 50w or straight 75w-90. Thanks Oldtimer!

 

[Torkman66]

Use this. Can get it on shelf at ORielys or Amazon. High in zinc.

 

[anoblefox]

Original spec is for 50Wt NON DETERGENT motor oil, hard to find, I had to buy a case of 12 qts to get delivery

 

[Yeller]

This is what I’ve been running in gear boxes for a long time.

 

[dmoses42]

Anybody using this? Liqui Moly 75w-90 High Performance Gear Oil

https://www.summitracing.com/parts/...4t1_-9rlMAvwtToIirV9hZcAWw8sf1LhoCWD8QAvD_BwE

 

[bronco italiano]

I use Swepco 201 gear oil in my axles/transfer case. Expensive but very high quality

 

[Broncobowsher]

The transmission on my motorcycle has gone through various oils. Currently filled with 0W10 engine oil. Run several years that way.
The farmers here are probably laughing. The Kubota I had was filled with universal oil. It ran through the manual transmission and all the hydraulics as well. You buy it 5 gallons at a time.
Special oils don't really matter until you are running on the ragged edge.

 

[Ol'Blue]

Thanks Gents. I found some non-detergent 50w. Crazy how many options there are these days.......