Thread: Oil for an M410
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Old 05-09-2021, 11:49 AM   #13
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Join Date: Nov 2016
Location: Santa Cruz, CA

Originally Posted by mikep View Post
If any archaic spec ever calls for engine oil in a trans, use motorcycle oil (4T). Many automotive oils do not play nicely with transmissions. Use the MB spec (not compatible with wet clutches) for any brass/bronze etc synchros. Or you can use ATF like I do. or transaxle lube, MTL, etc as long as you know it is compatible with your type of synchros.
If you have synchros with friction material, use 4T MA (compatible with wet clutches).
I am assuming the M410, given its relation to the M40/41 has synchros that are susceptible to GL5 eating them. I don't think there is any friction material.

Although I do wonder how the 4T oil plays with the cone clutch in the overdrive.
1967 122s, carbed B20F, M41, the sports tractor
1998 S70, grandma-mobile
1989 240 B230F, V15 cam, chipped EZK, M47 swap (Lost a fight with a Chevy express van), the millenial falcon
2012 VW Tiguan (screw plastic water pumps), daily
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