OK, I found a replacement pinion gear at my local Briggs shop, and he GAVE me a #41 chain that I cut and re-riveted back together.
This afternoon I've been selecting various shims from other transaxles to get a nice fit for my gearsets. Now, I'm trying to find that "00: grease. The auto parts stores, the bearing houses, and even Tractor Supply have never heard of it. If I can't find any, I'm going to John deere and get some cotton picker Spindle Grease.
Anybody know who might carry "00" ?
Don