Just a couple pics for future reference an old two speed setup we had around, even had some paperwork for it stuck in an old F-20 manual.Sold by Preferred Products Co in Fort Wayne, IN for $63.50 !Made by Spline and Gear Co 19380 Mt Elliott Detroit 12 Michigan. Has a 2.7:1 ratio in overdrive.Kind of a unique coupler so I tried to get a few shots of it.Stuck it on my 39 that already has fast 4th and 36 inch rubber for a test. May do the local tractor drive with it then off it comes and may go on 1 with slow 4th. Haven't been anywhere near full throtle yet but it will leave a letter series in the dust!