Gear Oil Spec for Twin Disc MG506

[FWHaas3]

I have Twin Disc MG 506 transmissions in my 31' Bertram with 270 HP 3208T Cats. I think the recommended gear oil is 40W, non detergent, but I am not sure
Can anyone provide me with the Twin Disc gear oil specs For the MG 506.

[CaptPatrick]

Fred,

40 wt non-detergent is correct...

Br,

Patrick