SKU: 90659626006

ATS Diesel 309-944-3104 E4Od Stage 4 Package 1989-1991 Ford 4Wd Diesel

Sale price$3134.24 Regular price$3482.49
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Description

ATS Diesel 309-944-3104 E4Od Stage 4 Package 1989-1991 Ford 4Wd DieselThe Ford E4OD transmission was designed to fit behind various powerplants including gas and diesel engines. Most failures revolve around the torque of the diesel motor, especially when power is increased over stock. The good news is that the framework of the E4OD allows for substantial increases in reliability and capability. ATS E4ODs Features: ATS Five Star Torque Converter featuring a billet cover, five lock up clutches, available in either low or

The Ford E4OD transmission was designed to fit behind various powerplants including gas and diesel engines. Most failures revolve around the torque of the diesel motor, especially when power is increased over stock. The good news is that the framework of the E4OD allows for substantial increases in reliability and capability. ATS E4ODs
Features:

  • ATS Five Star Torque Converter featuring a billet cover, five lock-up clutches, available in either low or high stall configurations
  • ATS billet input shaft
  • ATS Commander Lock-Up Controller
  • ATS billet flex plate
  • High performance overdrive, intermediate and forward clutch packs, with one additional clutch added per section
  • Modified transmission pump to increase line pressure, which provides increased clamping force on the clutch packs
  • Modified valve body that focuses around precise shifts, increase line pressure and increasing the torque capacity of the E4OD
  • New bearings, seals and gaskets
  • New low roller clutch, heavy duty intermediate sprag, bonded coast and overdrive pistons
  • ATS Deep Transmission Pan which adds 5 quarts of fluid over stock, which helps keep the transmission cool

The Stage 4 package includes a billet input shaft for increased reliability when towing heavy loads, under modified power levels or street performance. The billet input shaft is designed to withstand greater torsional loads than the factory shaft, thus increasing reliability.

The shaft is made of billet 300M material and precisely machined for an exact fit. In addition, we add a lock-up controller for the torque converter on the Stage 4 setup. This allows the user to base lock-up on vehicle speed in any forward gear. This provides several benefits, including increased fuel economy, lower transmission operating temperatures and more power to the ground, at a lower speed.

This feature becomes useful in towing situations and performance applications where power at low rpms is desired. For those trucks with an exhaust brake, the controller will synchronize torque converter lock-up with the brake. This will allow the converter to stay locked on deceleration to increase braking force. The Stage 4 features the addition of a billet flex plate.

The billet flex plate is designed for high horsepower/torque trucks and those that tow heavy. The flex plate is the first point of power transfer from the motor to the transmission assembly. By using a billet steel flex plate, we can increase the reliability of power transfer from the crank to the converter. The ATS Stage 4 Package is designed for trucks that are used for light/moderate/heavy towing, greater-than-stock power levels and racing/street performance. The transmission package comes with a 5 year / 500,000 mile warranty.
Application:

  • 1989-1991 F-250/F-350/F-450
  • Stage 4 4WD
  • Powerstroke Ford
  • Diesel
Shipping Notes
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Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 90659626006

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Helen M
Lowell, US
★★★★★ 5
Looks & Feels Good!
Size: X-Large, Color: Wine Red
I got this shirt for my husband in wine red and he likes it a lot! He can be very picky, but he hasn't had any complaints about this shirt. The wine red color looks just like it does in the picture and it fits true to size. It can be worn on its own or layered under a shirt or sweater when the weather gets cold. Hubby has machined washed and tumble dried this shirt multiple times and it still looks and feels great!
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Reviewed in the United States on November 15, 2025
K
Katerina Petrova
Grantham, US
★★★★★ 4
Long sleeve tee
Size: XX-Large, Color: Wine Red, Size: XX-Large, Color: Wine Red
Ordered this one size up simply due to preference. It runs true to size otherwise. The material is stretchy and the color was accurate. The ribbing sets this apart from other plain long sleeve tees. The only thing I don’t like is the curved hem. Makes it look very girly.
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Reviewed in the United States on October 6, 2025
D
David
Belleville, US
★★★★★ 5
Excellent fit and a good look
Size: Small, Color: Grey, Size: Small, Color: Grey
I'm very pleased with the way this shirt looks on me. Despite being a "squeeze" material, it's quite comfortable to wear. The fit, at least for me, is spot-on. Design-wise, I found that the lines on the front of the shoulders look a little odd, almost like they're supposed to the shoulder seams. But overall, I really like this shirt, and $20 for a shirt that fits this well is a steal.
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Reviewed in the United States on November 9, 2025
M
MTL
Grantham, US
★★★★★ 3
Bizarre bottom hem shape
Size: Medium, Color: Wine Red, Size: Medium, Color: Wine Red
First, my stats: I’m 6 foot 1, 185 pounds. I ordered a medium size. At first glance, I liked this shirt, but after observing what the bottom looks like, I’m not even sure I want to keep this. A picture is worth many words, so take a look at the ones I included in this review. The bottom hem in the front curves down in a strange sort of “tunic” style. This renders the garment completely unwearable in my opinion, as this is not a shirt that I think would look good tucked into pants. If the bottom of the shirt was flat/straight, it would be four or five stars. As such, I’m rating this three stars because the only thing wrong with this shirt is the bottom, and this might not bother everyone else.
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Reviewed in the United States on October 4, 2025
M
MichkaNik
Lake Worth, US
★★★★★ 5
Husband won't stop wearing this shirt!
Size: Large, Color: Black, Size: Large, Color: Black
My husband LOVES this shirt. The moment I wash it, he immediately wears it again. It is super soft and comfortable!
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Reviewed in the United States on November 18, 2025

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