F150 Ford 1990 Pickup Transmission Specifications

by Rob Wagner

The 1990 Ford F-150 pickup truck had four transmission choices: a three- or four-speed automatic and a four- or five-speed manual. Ford built some transmissions and acquired the others from outside vendors or other automakers.

Ford C-6

Ford built the C-6 three-speed automatic transmission from 1966 to 1996. It was featured most prominently in Ford Rancheros and Mercury Comets. The C-6 could handle greater horsepower than standard automatics. Its gear ratio was 2.46 for the first gear, 1.46 for the second and 1.00 for the third.

Ford AOD

The Ford AOD four-speed automatic saw production from 1980 to 1993. Ford equipped vehicles with big V-8s, such as Lincolns, Mustangs and Ford F-Series trucks, with the AOD. Its gear ratios were 2.40, 1.47, 1.00 and 0.67 -- similar the C-6 automatic. The AOD wide ratio transmission had a 2.84 first gear and 1.55 second gear.

New Process 435

Ford, General Motors and Dodge installed the New Process (NP) 435 four-speed manual transmission in many vehicles. Ford F-150 4X4s used the NP435. The NP435 was produced from 1966 to 1992. Its gear ratios were 6.69, 3.34, 1.79 and 1.00.

Mazda M50D

Mazda produced the M50D five-speed manual for the 1990 Ford F-150 and compact Ranger pickups. Mazda manufactured it from 1988 to 2000. Its gear ratios were 3.72, 2.20, 1.50, 1.00 and 0.79.

About the Author

Rob Wagner is a journalist with over 35 years experience reporting and editing for newspapers and magazines. His experience ranges from legal affairs reporting to covering the Middle East. He served stints as a newspaper and magazine editor in Saudi Arabia and the United Arab Emirates. Wagner attended California State University, Los Angeles, and has a degree in journalism.