ran303A Toploader transmission is a manually shifted gearbox desn built in three-speed and four-speed confurations, introduced in 1963 by the Ford Motor Company to replace the BorgWarner T-10. It was used in most FordsA Toploader transmission is a manually shifted gearbox desn built in three-speed and four-speed confurations, introduced in 1963 by the Ford Motor Company to replace the BorgWarner T-10. It was used in most Fords