5R110W TorqShift Transmission Service

DIY Service Guide for the 5R110W TorqShift Transmission

The 5R110W TorqShift automatic transmission was introduced alongside the 6.0L Power Stroke for the 2003 model year. In order to maximize transmission longevity, Ford recommends a full service every 30,000 miles. This includes replacing the fluid and both the pan and external transmission filters. MERCON SP is the only acceptable ATF to be used in this transmission, and use of any of any other fluid spec is ill-advised.

Applicable Model Years: 2003 - 2010 Ford Super Duty, TorqShift 5R110W transmission
Recommended Service Interval: 30,000 miles

5R110W Transmission Service Parts List


Part Number


Internal transmission filter

6.0L Power Stroke diesel

Motorcraft FT-144

Filter accessed by removing transmission pan

6.4L Power Stroke diesel

Motorcraft FT-180

External transmission filter

Motorcraft FT-145 (Ford 3C3Z-7B155-BA)

Filter located behind near ATF cooler on passenger side

Transmission pan gasket

Ford F6TZ-7A191-A

Gasket is reusable; replace if dry, cracked, or damaged

Automatic transmission fluid (ATF)


Use MERCON SP only; do not substitute with "universal" ATF

Transmission fluid temperature sensor (TFT)

Ford BC3Z-7H141-A

Consider replacing while transmission pan is removed

2003 - 2010 Super Duty 5R110W Transmission Service Procedures

There are many different procedures for servicing an automatic transmission, including the popular (and sometimes controversial) power flush method. The method described herein is favorable for the DIYer and requires no special equipment. For all intents and purposes, these service procedures are sufficient in maximizing the performance and longevity of the 5R110W TorqShift transmission. Ford specifies that the transmission be serviced every 30,000 miles regardless of the type of driving. Failure to follow the manufacturer's recommendations may decrease transmission life significantly.

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Draining the TorqShift transmission

• Place an oil drain container beneath the fluid pan of the transmission.

• Remove the transmission pan fluid drain plug using a 13mm socket and allow the fluid to drain completely, then replace the plug.

Removing the TorqShift transmission pan

• The transmission fluid pan is secured in place with 20 fasteners. The bolts are all identical and require a 10mm socket.

• Remove 18 of the 20 transmission pan bolts, leaving a bolt on both the driver and passenger side of the transmission (opposing sides). You'll need various extensions and a swivel joint attachment in order to access the rear pan bolts.

• While holding the pan against the transmission, remove the last 2 bolts and carefully lower the pan. The pan will retain a small amount of ATF, which should be emptied into catch container.

Chaning the transmission pan filter

• Remove the large pan filter assembly by pulling downwards with a slight side-to-side rocking motion.

Removing the old transmission filter gasket

• The transmission pan filter gasket tends to stick inside the filter orifice. Check to ensure that the gasket/o-ring was removed with the filter. If it is stuck in the orifice, carefully remove it with a small pick or screwdriver.

• Install a new transmission pan filter in the reverse manner it was removed. Lightly coat the gasket with fresh ATF to ensure a smooth installation and proper seal.

Cleaning the transmission pan and magnet

• Remove and completely clean the internal magnet sitting above the transmission pan drain plug. Excessive clutch material and/or shiny material in the transmission pan indicates that it has not been serviced properly and/or the transmission may have a problem. Large metal filings or chunks of metal debris is indicative of serious part failures - have the transmission tested and inspected by a professional.

• Completely clean the inside of the transmission drain pan, removing all remnants of the old fluid. Reinstall the magnet, clean the gasket mounting surface on the pan, then reinstall the pan on the transmission. The pan gasket can be cleaned and reused so long as it has not cracks or signs of deterioration. Torque the 20 pan bolts to 11 ft-lbs.

Removing the external transmission filter on a TorqShift transmission

• The external transmission filter is located inside the frame rails on the passenger side of the truck (crawl under front passenger side of truck and look above leaf springs/behind the radiator).

• Place an oil drain pan below the filter housing, then remove the external transmission filter using a 22mm socket.

Replacing the external filter on a TorqShift transmission

• Discard the used filter element and install the new one. The nipple on the plastic filter retainer inserts into the filter element (top and bottom of the filter element are identical) and then the assembly drops into the housing with the spring seating into the indentation on the bottom of the housing.

• Replace the external filter gasket, apply a light coating of fresh ATF.

• Reinstall the external filter assembly.

Adding ATF to a TorqShift transmission

• Remove the transmission dipstick and add MERCON SP ATF until the fluid level reaches the cold fill indication zone on the transmission dipstick. If possible, you can remove much of the guesswork out of refilling the transmission by measuring the amount of fluid removed.

• Once the transmission fluid level reads full, start and allow the truck to run for 2-3 minutes. Check transmission fluid level and add as necessary. Check for leaks around the transmission pan and external filter housing.

• Drive the truck and allow both the engine and transmission to reach full operating temperature, then check fluid once more and add as necessary.

• If the transmission has not been properly serviced in the past, we recommend draining the fluid (without removing the transmission pan) and refilling it once more after a few drive cycles. It is impossible to drain 100% of the transmission fluid with this technique, but repeating the drain and fill process replenishes the fluid supply with fresh ATF.