Muncie Three speed with Borg Warner R10 overdrive, complete with governor and solonoid. Bought for a project and never used. See pictures. Local pickup only. Metro Detroit.  More pictures available on request. May fit other years and trucks, but you would know better than me.

The numbers—

Main case-3845122 -E227 (May 22, 1957?) Side cover 3731911, assembly date code M605