I finally got my new-to-me '78 GT18 running after a carb and intake manifold rebuild, grease the starter shaft and replaced transaxle fluid. The big Onan twin starts easy and runs pretty good. But when I drive it around the yard in hi-2 and hi-3 it feels like it is moving like lo-2 and lo-3 in my 69 Custom. I would think they move the more or less the same since they both have the 8-speed hi/lo transaxle. They are direct gear drive, right?
But for all I know they could be geared much slower? It seems to move slow like the '67 Gravely I had for awhile.