2QM15 Transmission Lubricant

[Jim Logan]

I've got 30wt. motor oil in the transmission of my 1980 2QM15. Now that I've bought a Yanmar manual (listened to the boatyard operator before - should have known that was a mistake)I find that I should have automatic transmission fluid. I've used it for two years, no problems - I plan on changing to ATF by just removing 30 wt. and putting in proper amount of ATF - Does anyone think this will cause problems? I'm assuming the small amounts of 30wt. left in transmission will mix ok with the new ATF. Anyone got any thoughts on this?

 

[Ed Schenck]

Wonder why the difference?

My Yanmar and H37C documentation is clear. Use the same oil in the engine(2QM20) and the transmission. And I think that I have read that on the Diesel Forum as well. Is the 2QM15 tranny a different manufacturer? You should call Torreson Marine. They were host of the diesel forum for a long time and are Yanmar specialists.

 

[hp]

check trams

I agree with Ed,alot of tranmission were designed to have 30 wt. engine oil check what model the transmission is and recheck your info.

 

[Al Augustine]

trans lube

luckily i printed out and saved the answer to that question.dated10/10 according to K Furumiya,assistant mngr.of marketing for Yanmar. their recommended lube for the "QM" series was changed to transmission fluid. this was included in a newsletter to Southern Cross Owners(dated november 81)i have a 2qm20 and intend to change to trans fluid.