ATS Diesel 2011+ Ford 6.7L Power Stroke 6R140 Performance Valve Body

If you are towing heavy with a 2011-and-later Ford 6.7L Power Stroke, running more power than stock through the 6R140, or just tired of a mushy, late-shifting transmission under load, a stock-calibration valve body was never built for that duty cycle. This is the ATS Diesel performance valve body, part number 303-900-3368, a new unit built specifically to firm up shift behavior and move more oil through the transmission than the factory part does.

What the ATS performance valve body does in the 6R140

The valve body is the hydraulic control center of the 6R140 - it routes line pressure through its bores and spool valves to apply the clutch packs and bands, and it carries the pressure-control and shift solenoids the TCM uses to time every shift. ATS builds this unit with proprietary internal changes aimed at two things: controlling shift firmness so clutch packs apply faster and with less slip, and increasing oil delivery to the transmission so the unit runs cooler and the clutches get more consistent lubrication and apply pressure under sustained load. ATS markets it across a range from daily towing to full competition use, which is a different design goal than the factory valve body, which is tuned for smooth, quiet shifts in an unmodified truck.

Who this part is for

• Trucks that tow heavy and feel the transmission flare, slip or run hot under sustained load
• Power Strokes with added horsepower where the stock shift calibration can no longer hold the torque cleanly
• Torque converter clutch shudder or soft, mushy shifts that show up specifically under tow or boost
• Builds where the factory valve body has already been replaced once and the failure keeps coming back under the same hard use

If your truck is stock and the complaint is a diagnostic one - stored codes, a harsh 1-2 shift, or a flare that shows up at idle too - that points to a worn or failing stock-spec valve body rather than a performance upgrade. In that case our 6R140 valve body wear fix guide and the Ford 6R140 TorqShift problems and service guide are the right starting point, and a stock-calibration replacement like our remanufactured 6R140 valve body or 6R140 valve body for Ford Super Duty 6.7L is the more direct fix.

Fitment

This SKU is sold by ATS and its retailers under slightly different year ranges - some list it for 2011-2014 only, others for 2011 and up through 2019. Confirm your exact build year and engine/transmission combination before ordering, or send us your VIN so we can check the application against ATS's current fitment data, since a mismatched valve body will not seat and bolt up correctly even though the casting looks similar. See the full 6R140 parts collection for every other part sold for this transmission if you need to cross-check compatible accessories first.

Install notes

Because this is a new unit, not a core exchange on your existing valve body, drop the pan and filter at the same time so you are not running fresh valving behind old fluid and debris, and refill with Mercon LV ATF to spec - the 6R140 is PCM-controlled on gas applications and TCM-controlled on the diesel, and the fluid spec does not change with this upgrade. Torque the valve body bolts to the factory pattern rather than corner to corner, reconnect the internal solenoid harness fully before buttoning up the pan, and run the TCM's adaptive relearn after the swap so shift timing is relearned against the new unit rather than carried over from the old one. If you are also chasing heat under tow, pair this with a 6R140 service kit with filter and fluid so the fill is fresh when the new valve body goes in.

What does the ATS performance valve body do differently than the stock 6R140 valve body?

ATS builds in proprietary changes that firm up shift behavior and increase oil delivery to the transmission, aimed at towing and high-output use. The factory valve body is tuned for smooth, quiet shifts in an unmodified truck, not for sustained heavy load.

Is this a core exchange or a new part?

It is a new unit (SKU 303-900-3368), not a remanufactured core exchange, so you are not sending back your old valve body as part of the purchase.

What years does this fit?

ATS and its retailers list this SKU for 2011-and-up Ford 6.7L Power Stroke trucks, though some sources narrow that to 2011-2014. Confirm your build year or send your VIN before ordering to make sure the fitment matches your truck.

Do I need this if my truck is stock and just has a shift complaint?

Probably not. If your truck is unmodified and the issue is harsh shifts, stored codes or a flare at idle, that points to a worn stock-spec valve body. A remanufactured stock-calibration replacement is the more direct and less expensive fix in that case.

What fluid does the 6R140 use with this valve body installed?

Mercon LV ATF. The performance upgrade does not change the required fluid spec.

Do I need to do anything to the truck's computer after installing this?

Yes. Run the TCM's adaptive relearn drive cycle after installation so the computer relearns clutch apply timing against the new valve body rather than the old calibration.

• 6R140 Valve Body Wear: Symptoms and the Bench Fix
• Ford 6R140 TorqShift Problems and Service: A Rebuilder's Guide
• 6R140 Pressure Control (EPC) Solenoid Symptoms