The Eaton two speed 17221 rear axle was available on a variety of Chevy C60 sized trucks for many years. From what I can tell, it takes the RS404 ring and pinion. Available in any ratio you'd like and brand new for $340 all day long, those cheap gears make me wish I had the Eaton axle under this rig versus the T170 which is more difficult to get parts for it.
