Description

WPD 10R140 Transmission Rebuild for the Modified 7.3L Godzilla: Gas Super Stock Plus, Up to 800 HP

The performance 10R140 rebuild for the modified 7.3L Godzilla. Work hard, play hard. You’ve put work into your engine, whether that’s a tune, a cold air intake, headers, or more, and your transmission needs to keep up. The WPD Super Stock Plus is built for Ford Super Duty owners who have pushed past stock power levels and need an 800 HP 10R140 transmission that can handle it without flinching. This build delivers the durability, shift quality, and hydraulic control your modified Godzilla demands, whether you’re hauling equipment to a job site on Monday or pulling a loaded trailer to the track on Saturday.

The factory Ford 10R140 10-speed was never designed for the power levels that even modest bolt-ons can produce. Every upgrade in this build came directly from our own in-house testing and failure analysis: real units pushed to their limits under real-world conditions, torn down, studied, and rebuilt better. That’s not a one-time process. We keep raising the standard, refining specs and validating every build against the most extreme conditions we can put it through. The result is a Raybestos GPZ friction material spec with precision ground steels, reinforced hydraulic control, and a custom valve body calibrated for elevated torque demands, all while keeping the drivability you expect on the street.

10R140 Performance and Power Capability: Modified Builds Up to 800 HP

• Rated for modified builds up to 800 HP, engineered for tuned engines, bolt-on upgrades, and serious tow rigs running above stock power
• Raybestos GPZ friction material with precision ground steels to match. Same friction count as stock, upgraded to grab and hold at elevated HP where OEM material falls short
• WPD custom valve body with hydraulic calibration tuned for elevated line pressure demands
• Smooth, controlled shifts under power, with no flares, no bind-ups, and no harsh engagements
• Includes an aftermarket deep pan for added case rigidity and increased fluid capacity, which keeps temps in check under sustained high-load conditions

What’s Inside the WPD 10R140 Gas Super Stock Plus Build

Available Add-On: WPD DIY External Transmission Cooler Kit

Keep your transmission running cooler and cleaner for the long haul. Our DIY external cooler kit includes an external transmission cooler and inline filter, dropping fluid temps below coolant temperature and filtering out contaminants before they reach your fresh build. It’s easy to install, and one of the best investments you can make to extend the life of your transmission.

• External transmission cooler keeps fluid temps below coolant temp for significantly longer transmission life
• Inline external filter catches contaminants before they circulate through the transmission
• Simple DIY installation, no special tools required
• Available as an add-on at time of order. Ask our team for details

Ideal Applications for the Super Stock Plus

• Tuned 7.3L Godzilla F-250, F-350, F-450, and F-550 (2020–2026) with cold air intake, exhaust, and ECU/TCU tune
• Engine-modified Super Duty owners running 600–800 HP who need a transmission to match
• HD truck owners who work hard during the week and play hard on weekends, towing work equipment, race trailers, or recreational loads without compromising on reliability
• Heavy tow rigs pulling max-rated loads on a regular basis
• Owners who have already experienced transmission failures at modified power levels
• Performance-minded work truck owners who want reliability without sacrificing drivability

Why Upgrade the 10R140 in a Modified 7.3L Godzilla?

If you’ve upgraded your engine, your transmission is now the weakest link. The 7.3L Godzilla responds well to modifications, and when it does, the factory 10R140 is left scrambling to keep up. Heat builds, the OEM friction material loses its grip, and the valve body that was marginal at stock power becomes a real problem under load.

The WPD Super Stock Plus is built for the truck that does it all, and every decision behind it was driven by data, not guesswork. We test these units in the most extreme conditions, tear down what fails, and engineer the fix: the right friction material for the power level, and calibrated hydraulics for the pressures your modified engine puts on it. The result is smooth, consistent performance whether you’re pulling a gooseneck loaded with equipment Monday through Friday or hooking up a race trailer and heading out on the weekend.

This build is right for you if:

• You’ve tuned your engine or added bolt-on power upgrades
• You tow or haul regularly at or near max capacity, for work, play, or both
• You’ve had transmission issues since modifying your truck
• You want a transmission that can keep up with your engine now, and if you add more power later
• You plan to tune or want to get the absolute most out of your build. This transmission is ready for it

Important Notice: TCM Calibration and Tuning

This build is fully compatible with factory TCM calibrations. It will install and operate correctly on a stock tune right out of the box. However, to unlock the full benefits of this build, including optimal shift quality, line pressure response, and proper shift character, TCM parameter adjustments are recommended. A calibrated tune allows the control module to properly command the upgraded valve body and internal components the way they were built to perform.

2-Year Unlimited Mileage Warranty

Every WPD Super Stock Plus build is backed by a 2-year, unlimited mileage warranty. No mileage caps, no fine print. If there’s a problem with the build, we make it right, because we stand behind every transmission that leaves our shop.

Frequently Asked Questions

How much horsepower can the WPD 10R140 Super Stock Plus handle?

This build is rated for modified builds up to 800 HP, including tuned engines, bolt-on upgrades, and serious tow rigs running above stock power.

What trucks does the Super Stock Plus fit?

It’s designed for tuned 7.3L Godzilla F-250, F-350, F-450, and F-550 Super Duty trucks, model years 2020 through 2026.

Do I need a tune to run this transmission?

No. The build is fully compatible with factory TCM calibrations and works correctly on a stock tune. A calibrated tune is recommended to get the best shift quality, line pressure response, and shift character from the upgraded valve body and internals.

What friction material does the Super Stock Plus use?

Raybestos GPZ friction material with precision ground steels matched to its surface. The friction count is the same as stock, but the material is upgraded to grab and hold at elevated horsepower where OEM material falls short.

Does the build include a new transmission cooler and deep pan?

Yes. Every build includes a new OEM transmission cooler and an aftermarket deep pan for added fluid capacity and case rigidity. An optional DIY external cooler kit with an inline filter is also available at time of order.

What warranty comes with the Super Stock Plus?

Every build is backed by a 2-year, unlimited mileage warranty.

Ready to Upgrade Your Ford Super Duty?

Contact WP Developments today to get a quote, check lead times, or talk to our team about fitment, installation, or TCM calibration requirements.