Ford 4R100 Transmission

4R100 Transmission Specs & Ratios

Ford's 4R100 automatic transmission replaced the E4OD transmission for the 1999 model year Ford Super Duty, and was mated to the 7.3L Power Stroke diesel through 2003 model year trucks. When the 7.3L was phased out, so was the 4R100 transmission. In their place, the 6.0L Power Stroke and 5R110W TorqShift were introduced as replacements. The 4R100 proved to be a reliable transmission at stock performance levels. The transmission quickly becomes a weak link in the drivetrain when owners start drastically increasing their engines torque output. Fortunately, the aftermarket provides an array of solutions for 7.3L Power Stroke owners who need to increase the torque capacity of their 4R100. Though similar in design to the E4OD transmission, the E4OD and 4R100 components are NOT interchangeable.

Ford 4R100 Transmission Ratios






2.71 : 1

1.54 : 1

1.00 : 1

0.71 : 1

2.18 : 1


Ford 4R100 Transmission Specs


Ford 4R100


4 speed automatic overdrive transmission

Production Plant:

Ford Motor Company Sharonville Transmission Plant, Sharonville, Ohio



Model Years/Applications:

1999 -2003 Ford Super Duty w/ 7.3L Power Stroke diesel

Case Material:


Max Input Torque*:

1000 lb-ft


~ 270 lbs dry, w/ torque converter

ATF Type/Spec:

MERCON automatic transmission fluid, Ford has since replaced with MERCON V fluid spec

Service Intervals:

Replace fluid and filter every 30,000 miles


• 4R100 - 4 speed, rear wheel drive applications, 1000 lb-ft input capacity

*The4R100 features a max transmission input of 1,000 lb-ft, accounting for torque multiplication through the torque converter - the transmission is not rated for a maximum 1,000 lb-ft engine torque.