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post #14 of Old 05-29-2014
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Re: Yanmar 3GMD transmission oil confusion in manuals

Originally Posted by wrapper View Post
Asking again

Does anyone have a source for a definitive answer on the tranny oil (engine oil or Dexron)?
I think one of your previous posts says the tranny name plate says 20/30. This would be the weight of diesel engine oil. You DO NOT want to put in ATF oil into your transmission.

The yanmar manuals have many errors when calling out the transmission oil. I have a 3gmd also but with the v-drive Kansaki transmission. I used the same 40 weight oil in both the transmision and engine just to make life easy. The yanmar manuals are correct for engine oil but for transmission- follow the name plate data.
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