6R140 Stage 2 Tow Maxx Transmission – 850 HP Rated

Built to Tow Heavy. Engineered for Big Power. Backed by a 5-Year Unlimited Mileage Warranty.

When factory components aren't enough, the Thompson Transmission 6R140 Stage 2 Tow Maxx delivers the strength, reliability, and performance your Power Stroke deserves. Engineered to handle up to 850 horsepower, this transmission is built for truck owners who demand more than a basic rebuild—whether you're hauling heavy equipment, running aggressive performance tuning, or putting serious torque to the pavement.

The Stage 2 Tow Maxx takes the proven 6R140 platform to the next level with substantially increased clutch capacity, upgraded hydraulic components, machined overdrive apply pistons, and a billet torque converter. Every upgrade is selected to improve holding power, reduce clutch slippage, and deliver confident, consistent shifts under demanding conditions.

Unlike transmissions that rely on increased line pressure alone, our Stage 2 Tow Maxx combines additional clutch surface area with precision hydraulic improvements to manage the increased torque of modified 6.7L Power Stroke engines without sacrificing everyday drivability.

Key Features & Upgrades

• 5-Year Unlimited Mileage Warranty

• 850 HP Rated – Built for high-horsepower street and heavy-duty towing applications

• Billet Quad Disc Torque Converter – Designed for increased torque capacity and dependable lockup performance

• New OEM Ford Valve Body & Solenoids – Fresh hydraulic control components for reliable operation

• BD Pressure Enhancer Solenoid – Improved hydraulic pressure control under demanding loads

• New Valve Body Harness – Reliable electrical connections and solenoid operation

• Machined Overdrive Apply Pistons – Accommodates increased clutch capacity

• All-New Coated Bushings & Bearings – Improved durability and reduced wear

• Complete OEM Rebuild Kit & New Filter – Quality components throughout

Increased Clutch Capacity Where It Matters Most

We don't just replace worn-out components—we increase the transmission's ability to hold power.

• 6-Clutch Forward Drum – Increased from the factory 4–5 clutch configuration

• 6-Clutch Direct Drum – Increased from the factory 4–5 clutch configuration

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

• 7-Clutch Intermediate Pack – Increased from 5 factory clutches

These upgrades provide increased friction surface area and improved torque-holding capability, helping the transmission withstand the demands of larger turbochargers, increased fueling, heavy towing, and performance tuning.

Built for Trucks That Do It All

Whether your Power Stroke spends its days pulling loaded trailers, commuting to work, or making serious horsepower on the weekends, the Stage 2 Tow Maxx is designed to deliver the strength you need without compromising the drivability you expect.

Why settle for a transmission that barely handles your power when you can have one engineered to handle it confidently?

With an 850 HP rating, extensive internal upgrades, and our 5-year unlimited mileage limited warranty, the TDP Stage 2 Tow Maxx delivers the performance, durability, and peace of mind that serious Power Stroke owners demand.

Thompson Transmission – Built to Hold Power. Built to Last.

Converter stall speed must be specified in the order notes. Warranty subject to TDP terms and conditions.