So I look online and the manual that I can find is for the older style gearbox. Then I got back to the manual I got with the machine (paper) and guess what it's also for the older style gearbox. The recommended oil appears to be a big secret and sys JD GL-5. Well I see two viscosities for this and would prefer to just be given the spec with the weight.
I am not happy at all with needing to bang out the damaged cover and modify it so it won't happen again due to a design defect.
If someone has the actual recommendation I would appreciate that.