Re: Machining LI or LS Ring Gear to Fit Swiftamatic
The bronze gear of a differential is called a worm gear. The worm is the guy up in the chassis, as the worm turns, it pulls or pushes the worm gear of the differential around.
A ring gear in a Gravely is in either the High/Low planetary, or the Forward/Reverse planetary assemblies.
There are four lead single speed differential worm gears and lead worms, but they will not work with a two speed differential.
As jrd mentioned, there are six lead Swiftamatics in the four hundred series four wheel tractors. With the right parts, you can convert a LI to an LI8. I have one and it is great for brush hogging.
There were a few Commercial Kohler power two wheelers that were six lead, and maybe even a four lead roofing machine, but I have never seen one.
Faux Pas are my forte