E4OD Stage 1 Transmission Package

Features:

• Fits 1989–1991 Ford F-250 and F-350 4WD
• Built for daily driving and light towing
• Includes ATS Five Star torque converter
• Billet converter cover with five lock-up clutches
• Upgraded clutch packs for improved holding power
• Modified pump increases line pressure for durability
• Valve body tuned for firm, precise shifts
• New bearings, gaskets, and seals included
• Heavy-duty sprag and low roller clutch upgrade
• Deep transmission pan adds five quarts capacity
• Ideal for stock or mildly tuned power levels
• Backed by 5 year/500,000 mile warranty

Keep Your Classic Ford Shifting Strong Every Time

If you're still running a 1989–1991 F-250 or F-350 and want to keep it reliable for daily use, weekend projects, or light towing, the ATS E4OD Stage 1 Transmission Package is a solid upgrade. This package is built for trucks running stock or slightly modified power levels, giving you a dependable transmission solution that’s more durable than stock without going overboard. It features the ATS Five Star torque converter, complete with a billet cover and five lock-up clutches, delivering smoother engagement and reduced slippage. You’ll feel the improvement whether you're cruising down the highway or hauling a small trailer to the jobsite. It's backed by a 5 year or 500,000 mile warranty, which speaks volumes about the confidence ATS puts into their build quality. This isn't just a rebuild kit thrown together, it's a professionally engineered package designed to extend the life of your truck. If you’re looking to modernize the performance of your classic diesel without stepping into race territory, Stage 1 is exactly where you want to be.

Balanced Performance For Light Duty Diesel Builds

The ATS Stage 1 E4OD Transmission Package is designed for 1989–1991 Ford 4WD trucks equipped with the diesel engine, offering a smart upgrade for those sticking close to factory tuning. Internally, it features upgraded clutch packs in the overdrive, intermediate, and forward sections, each with one additional clutch for improved torque handling. A modified transmission pump increases line pressure, helping deliver better clamping force to reduce wear and slippage under light towing or steady throttle loads. The valve body is reworked to produce clean, controlled shift timing while improving the torque capacity of the E4OD unit as a whole. This package also includes fresh bearings, gaskets, and seals, along with a heavy-duty intermediate sprag and roller clutch to help manage stress in real-world driving conditions. To keep temps down, the included ATS deep transmission pan adds five extra quarts of fluid over stock. Altogether, the Stage 1 kit is a smart, cost-effective choice for drivers who want a more dependable transmission that fits within the limits of light- to moderate-duty use.

Fitment: 1989, 1990, 1991 Ford F250/F350 Powerstroke 4WD 7.3L IDI

Notes:

• Fits 1989–1991 Ford F-250 and F-350 4WD models
• Designed specifically for diesel applications, not gas engines
• Built for trucks with stock or mildly upgraded power
• Ideal for daily driving, light towing, or weekend use
• Not intended for high horsepower or heavy towing builds
• Includes deep pan that adds five extra quarts of fluid
• Requires existing E4OD transmission core for installation
• Professional installation is recommended for optimal performance
• Transmission must be properly tuned and installed to validate warranty
• Covered by a 5 year/500,000 mile limited warranty
• $500 shipping surcharge will be applied at checkout