ran303The 3.03 that was behind I6's, small blocks and 352FE's had 2.991.721.00 gears and the 390FE and up had 2.421.601.00 gear ratios. I'm pretty sure the 2.42 box also had aA 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