It is an MS2 transmission from a TMD22 Volvo Penta Diesel to a propeller shaft on a 42ft sailboat. If you're after the serial number, I'll have to get that tomorrow.
The fluid was drained and replaced two years ago, about 400 engine hours. It appears clean.
Marine Mechanic
30 yrs experiance,certified raymarine electronics installer,certified mercruiser mechanic,