Suspended Ford pick-up truck at RDI Powers. Concept image of “Truck Transmission Talk: Examining the Ford E40D and 4R100” | RDI Powers in Brooksville, FL. The transmission is a vital component in determining a truck’s power and performance. Two notable transmissions in Ford’s truck lineup are the E4OD and 4R100.

The E4OD and the 4R100 share many similarities, including weight, aluminum case, gear ratios, and fluid capacities. However, the 4R100 features stronger internal components to handle increased power. In this post, we’ll examine both transmissions, exploring their differences and issues.

What is the Ford E4OD?

The E4OD is an evolution of the older C6 transmission. Ford developed the E4OD to provide an overdrive option, improving fuel economy, power, and torque handling. The E4OD was designed for the Bronco, F-150, F-250, and F-350 series of trucks and was in production from 1989 to 1997.

The E4OD’s versatility and compatibility with various engines made it a popular choice for upgrades and swaps. However, the E4OD had its share of issues, including seal leaks, slipping into neutral while driving, and hard shifting.

What is the Ford 4R100?

Introduced in 1997 as the E4OD’s successor, the 4R100 was designed to withstand the demands of Powerstroke diesel trucks. While the two transmissions appear nearly identical externally, their internal components differ significantly.

The 4R100 features a dedicated output shaft speed sensor and a pulse-width modulated torque converter clutch solenoid for diesel trucks, which was later added to gas vehicles. It also has a more robust oil pump for improved line pressure production.

Problems with the E4OD and 4R100

Despite their improvements, both transmissions had issues. The 4R100 addressed many of the E4OD’s problems but had its own set of challenges, including:

  • Weak torque converters with thin lockup clutches
  • Inexpensive valve body assembly prone to leaking and flexing
  • Overdrive clutches susceptible to burning under heavy loads
  • Worn pump gears affecting clutch pack pressure
  • Weak, low-volume transmission oil pan
  • Input shaft failure under certain conditions (e.g., larger tires, heavy loads)
  • Overdrive planetary assembly failure under heavy loads
  • Older solenoid block issues due to moisture ingress and burnt-out copper windings
  • Plastic intermediate sprag assembly

These issues can be addressed through transmission rebuilds, repairs and upgrades, extending the life of your truck’s transmission and saving you from purchasing a new vehicle.

Contact RDI Power For Transmission & Other Truck Repairs in Brooksville, FL

Rely on RDI Power in Brooksville, FL, for truck transmission rebuilds, repairs, and other services for your Ford trucks. Our experienced technicians are well-versed in working on Ford and various truck models.

Call us for an appointment at (352) 433-3800. We are conveniently located at 1665 Donto Way, Brooksville, FL 34601.