E4OD Stage 2 Transmission Package

Features:

• Fits 1989–1991 Ford F-250/F-350 2WD
• Includes billet 300M input shaft upgrade
• Built for towing and street performance
• Five Star torque converter with billet cover
• Five lock-up clutches for improved durability
• Modified valve body for crisp, firm shifts
• High-performance clutch packs with added capacity
• Enhanced transmission pump increases line pressure
• Heavy-duty sprag and roller clutch included
• Deep pan adds five extra quarts of fluid
• Designed for trucks with increased power levels
• Backed by 5 year/500,000 mile warranty

Take The Guesswork Out Of Upgrading Your Transmission

When you're pushing your 1989–1991 Ford F-250 or F-350 beyond stock power, the factory E4OD transmission just isn't going to keep up. That’s where the ATS Stage 2 Transmission Package steps in. Whether you're towing heavy loads, daily driving a modified diesel, or just want a reliable street setup, this package is built to handle the pressure. At the heart of it is ATS’s billet input shaft, crafted from high-strength 300M material to withstand the kind of torque that would twist a stock shaft in half. You also get their Five Star torque converter, loaded with five lock-up clutches and a billet cover for maximum durability and performance. It’s the kind of upgrade that gives your transmission real staying power, especially under load or when your right foot gets a little heavy. This isn’t just a rebuild, it’s a full-on transformation designed to outlast and outperform what your truck came with from the factory.

Strengthened Internals And Smarter Pressure Control

The ATS Stage 2 E4OD package is purpose-built for reliability under increased stress, using a combination of precision machining and proven performance upgrades. A billet input shaft made from 300M steel helps distribute torsional loads more effectively, especially when towing or running performance tunes. The transmission pump has been modified to increase line pressure, which gives the clutch packs more clamping force and reduces slippage. Speaking of clutches, each clutch pack, including overdrive, intermediate, and forward, features upgraded materials and adds one extra clutch per section for greater holding power. The valve body has been carefully reworked to improve shift timing, torque handling, and overall responsiveness. ATS also includes a deep transmission pan that holds an additional five quarts of fluid to help manage heat during long pulls or summer hauls. This setup is ideal for trucks running higher-than-stock power and looking for a dependable drivetrain upgrade that can take a beating.

Fitment: 1989, 1990, 1991 Ford F250/F350 Powerstroke 2WD

Notes:

• Fits 1989–1991 Ford F-250 and F-350 2WD models
• Designed specifically for diesel applications, not gas
• Compatible with the factory E4OD transmission layout
• Not intended for stock trucks with no performance upgrades
• Ideal for trucks used in towing, street performance, or moderate racing
• Billet input shaft adds strength under higher torque loads
• Includes deep transmission pan that increases fluid capacity by 5 quarts
• Requires proper installation to ensure shift quality and durability
• May not be compatible with aftermarket controllers or standalone ECUs
• Transmission must be installed by experienced builder or shop for warranty coverage
• Covered by a 5 year/500,000 mile limited warranty