6R140 Stock-Plus Transmission – Built for Reliability

Factory Drivability. Upgraded Durability. Backed by a 3-Year Unlimited Mileage Warranty.

Your Power Stroke works hard. Your transmission should be built to work even harder.

The Thompson Transmission 6R140 Stock-Plus is engineered for truck owners who depend on their vehicles every day and demand more reliability than a standard factory replacement can offer. Whether you're towing heavy trailers, hauling equipment, or putting thousands of miles on your truck, our Stock-Plus transmission delivers the strength and dependability you need without sacrificing the smooth, comfortable shifting you expect from your Ford Super Duty.

This isn't just another rebuilt transmission. We've taken the proven 6R140 platform and addressed common factory weaknesses with upgraded clutch capacity, new OEM Ford hydraulic components, premium Exedy friction materials, and a completely refreshed internal assembly.

By increasing clutch capacity in critical areas, the Stock-Plus provides greater holding capability and improved durability under load while maintaining factory-like shift characteristics. The result is a transmission designed to handle the demands of everyday driving and hard-working diesel trucks.

Key Features & Upgrades

• 3-Year Unlimited Mileage Warranty – Confidence and protection for the miles ahead.

• New OEM Ford Valve Body & Solenoids – Fresh hydraulic components for consistent, dependable shifting.

• New Valve Body Harness – Reliable electrical connections and transmission control.

• Premium Exedy Clutches & Steels – Quality friction materials engineered for durability.

• Increased Clutch Capacity – Additional friction surface area in critical clutch packs for improved torque-holding capability.

• New Coated Bushings – Designed to reduce wear and improve long-term durability.

• All-New Bearings Throughout – Replaced to help ensure smooth, reliable operation.

• Complete OEM Rebuild Kit – Quality replacement components throughout the transmission.

• New Torque Converter – Restores dependable torque transfer and lockup operation.

• New Transmission Filter – Helps maintain proper fluid filtration.

More Clutch Capacity. More Confidence.

Where factory clutch capacity can become a limitation under demanding conditions, our Stock-Plus build incorporates upgraded clutch configurations for increased holding power.

• 5-Clutch Forward Drum – Upgraded from 4 clutches on 2015–2019 models.

• 5-Clutch Direct Drum – Upgraded from 4 clutches on 2015–2019 models.

• 9-Clutch Overdrive Pack with Apply Plate – Increased from 7 factory clutches.

• 6-Clutch Intermediate Pack – Increased from 5 factory clutches.

These improvements provide additional clutch surface area to better manage the demands of towing, hauling, and everyday operation without requiring aggressive performance-oriented shifting.

Built for the Trucks That Pay the Bills

Not every Power Stroke needs an 850-horsepower performance transmission. Sometimes you simply need a dependable transmission that can handle long highway trips, loaded trailers, job sites, and daily driving without letting you down.

That's exactly what the 6R140 Stock-Plus was built to do.

Ideal for:

• Stock and lightly modified 6.7L Power Stroke trucks

• Daily drivers and work trucks

• Occasinal Hauling applications

• Fleet and commercial vehicles

• Owners looking for a stronger alternative to an OEM replacement

Why Choose Thompson Transmission?

At Thompson Transmission, we believe a replacement transmission should be built to address the weaknesses of the original—not simply repeat them.

Our 6R140 Stock-Plus combines OEM Ford components, premium friction materials, increased clutch capacity, and careful assembly to deliver a transmission you can depend on.

And with our 3-year unlimited mileage limited warranty, you can get back to work knowing your investment is backed by a company that stands behind its builds.

Don't just replace your transmission. Upgrade it.

Thompson Transmission – Stronger Where It Counts. Factory Feel Where It Matters.

Warranty subject to TDP terms and conditions. Intended for stock and lightly modified applications. For higher-horsepower builds, explore our 6R140 Stage 2 Tow Maxx.