I have time. I found the manual on line and found out how to check the lube. It was OK. To check, the pan has unscrew from the housing. It is in the tilth constantly. I had to spend 15 minutes cleaning the tines, then wire brush the dirt out of the phillips heads. The cover came loose from a perfect cork gasket I have a qt of MTL that I'm using in The Ariens snow blower's augur drive. I bought MTL because it was the only one that said it was safe for brass. Other labels skirted the issue. The Mantis has a brass ring gear.It is a similar application. IIRC, the MTL is 80/90.
2 1988 BMW 528e 20w50 dino, STP filter
1994 Ranger ,600$ Rat, 5w30 dino, STP filter