Transmission oil

[FPNC]

Marc1

You need verify what you have and obtain the correct owners manual.

[Marc1]

Hi there.
Would anyone know the normal operating temperature of the Twin disk MG360?
I don't have a temperature gage for the gearbox, however placing the hand on the side of the gearbox it is hard to keep the hand on it ... yes I know not very scientific, but at a guess 70 C ?

[AndyEss]

I think 70C is about 150F.
No way you would be able to keep your hand on that. Alcohol boils at 70C.
Maybe your tranny runs at 50-60 C (120-140F)?

[a64pilot]

It certainly could run that high.
Almost all auto transmissions are cooled by a transmission cooler inside of the radiator, which in a car runs at 195f, so the auto transmission must run considerable higher to be cooled by a cooler in 195 f water.

I’m not saying that is normal, I have no idea what is, but 170f isn’t outside of the realm os possibility I wouldn’t think.

Call an overhaul shop if you can’t find anything in the manual, they should know

[S/V Adeline]

Originally Posted by Marc1

Yes, I saw that Gord, and that was why I contacted Nanni.
Now I have written to Twindisk but so far no reply. Not holding my breath.

I had decent luck with
hall.steven@twindisc.com
Ask about synthetics too.

[Wotname]

Originally Posted by Marc1

Hi there.
Would anyone know the normal operating temperature of the Twin disk MG360?
I don't have a temperature gage for the gearbox, however placing the hand on the side of the gearbox it is hard to keep the hand on it ... yes I know not very scientific, but at a guess 70 C ?

A very rough approximation is the pain threshold of the human hand is about 50C which is also the temperature that meat proteins start to cook or so I'm told.