0NachoMahma 12 years ago . Identify the transmission and use Google to find the info. 4-speed T-18, 5-speed M5OD, and 5-speed ZF S5-42 were the standard manual trannies in 9th generation (1992-1996) F150s. . There is usually a fill hole on the side of the tranny. Remove the threaded plug and add fluid until it runs out. YMMV.