S6-S650F Remanufactured Manual Transmission

The Zumbrota Drivetrain S6-S650F manual transmission is a remanufactured unit specifically built for 1999-2000 Ford F250 and F350 trucks equipped with the 7.3L diesel engine and a 4x4 drivetrain. This robust six-speed transmission features a wide gear ratio spread, from a 5.79 low gear for pulling power to a 0.72 overdrive gear for efficient highway cruising. During the remanufacturing process, Zumbrota Drivetrain conducts three distinct quality inspections. This includes a comprehensive 100% inspection of all internal components, such as gear wear checks, mainshaft straightness tests, and synchronizer testing. A final post-build inspection ensures the transmission meets Zumbrota's high standards before it is dynometer tested through numerous real-life scenarios. Technical details for this transmission include ZF-built front and rear cases with an integral bell housing. It utilizes a 5.79:1 low gear ratio and a 0.72:1 overdrive ratio. The unit is also identified by several part numbers, including ID numbers like 1319-050-002, 1319-050-006, and 1319-050-023, as well as Ford part numbers F81A-DD, F81A-DE, F81A-DF, F81A-DG, and F81Z-DERM. The corresponding Hollander number is 400-03384.