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M923 transfer case oil type

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16
Location
Las cruces nm
I was wondering what type of oil you guys use in these transfer cases? What seems to work the best and leak the least? If i have a leak rather than put a new gasket could i put oil stop leak in it? I dont mind a little oil coming out of it, I would rather fill her up once and a while rather, than rebuild it or put a whole other one in. Thanks!
 

GHall

New member
255
0
0
Location
San Antonio/TX
Last I looked I think it was 90 Wt.. The Tm's should have it in there somewhere. The military may have used 30 Wt (the same stuff that comes in the tranny).
 
Last edited:

emr

New member
3,209
25
0
Location
landing , new jersey
The trannys have 10wt, to light for the transfer , I use 5 gal pails of 80/90 with a gal of lucas dumped in, on all diffs and transfer cases .But for sure read the TM's.
 

Doomsday

New member
55
0
0
Location
Castaic, CA
I used 80/90 Lucas gear oil. Good stuff, got three 5 gal buckets from Summit Racing for under $300 shipped! Gotta love Summit!
 
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