The long-awaited Borg-Warner T-50 five-speed transmission for ... There are actually three separate gearsets for the T-50, two with overdrive in fifth, and one with a direct fifth.

One of the most popular drivetrain mods done to early Mustangs is to swap out the non-overdriven three- and four-speed transmissions with the later-model overdrive ... by Borg-Warner and first ...