2022 Ford F‑350 Super Duty — Transmission Fluid & Service

Quick answer

• Transmission(s): Ford TorqShift 10R140 (most 7.3L gas and 6.7L Power Stroke), and TorqShift 6R140 (some 6.2L gas trims)
• OEM fluid spec:
  • 10R140: Ford Mercon ULV (WSS‑M2C949‑A equivalent)
  • 6R140: Ford Mercon LV (WSS‑M2C938‑A equivalent)
• Drain & fill capacity (approx.):
  • 10R140: 7–9 quarts (6.6–8.5 L)
  • 6R140: 7–8 quarts (6.6–7.6 L)
• Full overhaul/dry fill capacity (approx.):
  • 10R140: 17–18 quarts (16–17 L)
  • 6R140: 17–19 quarts (16–18 L)
• Filter: Serviceable pan filter for both; verify the exact Motorcraft/OEM part number with a Ford dealer or the service manual by VIN.
• Recommended service interval:
  • Normal use: 60,000–100,000 miles (96,000–160,000 km)
  • Severe duty/towing/plowing: 30,000–50,000 miles (48,000–80,000 km) with periodic inspections

Fluid type explained

Ford used two different TorqShift automatics in 2022 F‑350s. Most 7.3L gas (Godzilla) and all 6.7L Power Stroke trucks use the 10‑speed TorqShift 10R140, which specifies Mercon ULV. Some 6.2L gas configurations retained the 6‑speed TorqShift 6R140, which specifies Mercon LV.

• Mercon ULV (10R140): This is an ultra‑low viscosity ATF engineered to reduce drag and improve shift response in the 10‑speed. It’s not backwards‑compatible with Mercon LV. Only use fluids that explicitly meet Ford WSS‑M2C949‑A (often labeled “Mercon ULV”).
• Mercon LV (6R140): Low‑viscosity ATF designed for the heavy‑duty 6‑speed unit. Use products meeting Ford WSS‑M2C938‑A (“Mercon LV”). Do not substitute ULV in a 6R140.

Mixing LV and ULV is not acceptable. If you are unsure which transmission you have, verify by VIN or by the powertrain label. Using the wrong fluid can cause harsh shifting, clutch slippage, and premature wear.

Service procedure

Below is a general approach used by professionals. Always follow the factory service manual for temperatures, torque specs, and safety procedures specific to your VIN.

Drain & fill with pan service:

1. Warm the transmission to operating temperature, then allow it to cool slightly so the pan can be handled safely.
2. Raise and level the truck. Remove the pan drain plug (if equipped) and drain the fluid. Expect roughly 7–9 quarts on a 10R140 and 7–8 quarts on a 6R140.
3. Remove the pan. Clean the pan and magnet. Replace the pan gasket if not reusable.
4. Replace the internal serviceable filter. There are application differences—confirm the exact Motorcraft filter part number by VIN with a Ford dealer or the service manual.
5. Reinstall the pan and torque bolts evenly in a criss‑cross pattern to spec.
6. Refill with the correct ATF through the fill port. Many TorqShift units use a level/standpipe check system rather than a dipstick.
7. With the truck level, start the engine, foot on brake, and cycle slowly through all gear positions, pausing 2–3 seconds in each. Return to Park.
8. Using the specified temperature window in the service manual (often around 95–113°F/35–45°C for initial level checks), remove the level plug and top off until fluid just begins to weep at the standpipe. Reinstall the plug, shut down, recheck for leaks, then perform a road test and re‑verify hot level per procedure.

Full exchange/overhaul fill:

• After a rebuild or torque converter replacement, total capacity is roughly 17–18 quarts (10R140) or 17–19 quarts (6R140). Use the factory fill and level‑check procedure and temperature windows.
• If performing a service “exchange,” the safest method is multiple drain‑and‑fills a few hundred miles apart, or use a professional exchanger connected to the cooler lines while adding only the specified fluid. Avoid high‑pressure flushing on high‑mileage or unknown‑history units.

Tips:

• Only open bottles of ULV/LV right before use to avoid contamination.
• Keep the truck level during checks; these transmissions are sensitive to fluid level.
• If towing, consider adding an auxiliary temp gauge and keep sump temps under ~220°F when possible.

Service interval

Ford’s official intervals vary by operating conditions and can be long, but fluid condition and use case matter more in the real world.

• Normal use (light load, mostly highway, moderate climate): 60,000–100,000 miles with filter service.
• Severe duty (heavy towing, plowing, frequent stop‑and‑go, hot climates, dusty/off‑road, PTO use): 30,000–50,000 miles with filter service and annual inspections. If fluid regularly exceeds 220°F or you tow near GCWR often, service to the shorter end of the range.
• Under warranty: Follow the owner’s manual/scheduled maintenance guide. If you deviate, keep records and use Ford‑approved fluids.

Rule of thumb: new ATF should be bright red and translucent. If it smells burnt, appears brown/opaque, or contains metallic debris, shorten the interval and investigate.

Common transmission problems (2020–2022 Super Duty generation)

10R140 (10‑speed):

• Harsh or delayed shifts, particularly 3–4 or 5–6: often improved with TCM software updates and a proper relearn after service. Low or incorrect fluid amplifies the issue.
• Torque converter clutch shudder under tow: inspect fluid condition and cooler performance; updated calibrations and fresh ULV can help.
• Thermal management and cold‑weather driveability: some trucks exhibit firm shifts until ATF warms. Ensure the thermal bypass and cooler circuits are functioning.
• Park pawl/park mechanism concerns: certain 2020–2022 trucks were subject to recalls/TSBs. Check your VIN for outstanding campaigns.

6R140 (6‑speed):

• Firm 2–1 downshifts or flare complaints: commonly addressed with PCM/TCM updates and correct LV fluid level.
• Converter clutch shudder or early converter wear on high‑mileage tow rigs: rigorous fluid service and cooler efficiency are key.
• Cooler line or thermal bypass seepage: monitor for leaks and replace O‑rings/lines as needed.

For both:

• Any adapter or case leak will quickly aerate fluid and cause erratic pressure—fix leaks immediately and verify level via the standpipe procedure.
• After battery disconnect or module updates, perform a proper adaptive shift relearn per the service manual.

If you’re unsure which transmission your F‑350 has, call a Ford parts counter with your VIN—they’ll also confirm the correct filter part number and any software updates or recalls.

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