TM not clear on M939 transfer lube

[OPCOM]

OK, what lube goes in the transfer case of the M939 series? This is the T-1138 transfer case. The TM copy is not clear on that.

Does this require the MT-1 rated lube like the M35 and M818?

(the lube that does not attack yellow metal)

In that case, GL1 or GL5/MT-1 should do.

 

[jasonjc]

The LO calls for GO 80/90. So GL5/MT1 should be fine.

 

[steelsoldiers]

Yep, I used 80/90 GL5/MT1 in all of my trucks without a problem.