6R140 Filter and Pan Service Guide

A 6R140 pan and filter service is a two-hour job that people turn into a comeback. The torque values are low, the pan gasket is reusable, and the fill goes in through the dipstick tube. The two places it goes wrong are the filter neck seal and the level check. The short version: 19 pan bolts at 80 lb-in (9 Nm) in a crisscross pattern, 3 filter bolts at 97 lb-in (11 Nm), a Motorcraft FT-187 (BC3Z-7A098-B) filter on 2011-2019 Super Duty units, about 8.2 quarts of MERCON LV to refill, and a final level check hot, not cold.

Below is the job the way I do it on the bench, with the numbers traced to Ford, Sonnax and the pan manufacturers' install sheets. If you only need fluid type and capacity, that is covered in more depth in our 6R140 fluid type and capacity guide. This one is about getting the pan off and back on without creating a new problem.

Recommended 6R140 parts

The filter, fluid and pan for this job, matched to the 2011-2019 Super Duty 6R140. Secure checkout on site.

6R140 Transmission Filter and Pan Gasket Kit, Ford Super Duty TorqShift

$53.99View part

6R140 Transmission Service Kit with Filter and 10qt Fluid

$383.99View part

6R140 Aluminum Deep Transmission Pan, Ford Super Duty

$343.99View part

Parts and tools before you drop the pan

Have everything on the bench before the drain plug comes out. A Super Duty sitting on stands with an open pan and no filter is how shortcuts happen.

The fluid has to be MERCON LV. Ford Component Sales lists it as the fluid on the 6R140 spec sheet, and the unit holds about 4 gallons total. Ford's own Motorcraft fluid chart agrees: it lists MERCON LV for the 6R140 in the 250-550 Super Duty, the 650-750 medium duty, the E-Series and the chassis cab and motorhome applications, and MERCON ULV only for the 10R100 and 10R140 that replaced it in the pickup. ULV is a different fluid. On a mixed fleet, check which transmission the truck has before you open a jug.

Also pick up a funnel with a long, narrow neck. There is no separate fill plug on the stock pan. ATS and BD both have you fill through the dipstick tube, and that is how the job goes on a stock truck too.

Step 1: Drain and drop the pan

Park the truck level, set the parking brake, and put it on stands if you need the room. Warm fluid drains faster, but a 6R140 that just came off a tow can be well over 200°F. Let it cool down enough to handle.

1. Pull the drain plug and let it drain. ATS says to wait until it is only dripping every 3-4 seconds, then reinstall the plug. A pan with the plug back in is much easier to lower.
2. Remove the pan bolts starting at the rear. Mag-Hytec's sequence is to pull 17 of the 19, then loosen the last 2 slowly so the pan tips and drains without dumping on you.
3. If the pan is stuck, BD says to tap the side with a soft-faced mallet. Do not pry at the gasket rail with a screwdriver. A gouge in the case rail becomes a leak you cannot fix with a gasket.
4. Lower the pan and save the gasket.

About 8 quarts will come out. The torque converter and the cooler circuit keep the rest. One pan service only replaces about half the fluid, which I get back to below.

Step 2: Read the pan before you clean it

This is the part of the job that tells you whether the transmission is healthy. ATS's install guide says to check the factory magnet for debris because it can be an early warning of future problems. I look at three things before any solvent touches the pan.

• The magnet. A light gray paste of fine particles is normal wear on a unit with miles on it. Slivers, flakes, or pieces you can pick up with your fingers are not.
• Friction material. Dark brown or black fibrous material in the bottom of the pan means clutches are wearing. Combined with a burnt smell, the fluid service is not going to fix what the customer is feeling.
• The fluid itself. Look at what drained out. Bright red to light brown with no burnt smell is fine. Dark and burnt means heat damage, and on a 6.7L that sends me to the cooling system next.

BD's instructions say that if you find metal debris in the pan, stop and call them before bolting on their deep pan. That is good advice for any pan. A deep pan on a transmission that is already shedding metal just holds more contaminated fluid.

Clean the pan and magnet, then clean the case gasket rail with lint-free rags. Mag-Hytec says the surface must be clean and flat for the gasket to seal. If there are dents or high spots on the rail, take them down with a smooth flat file and do not round off the edge.

Step 3: Filter out, and check the neck seal

The filter comes off with 3 bolts. Pull it straight down. On a normal unit the neck seal will give some resistance coming out of the pump intake. Pay attention to that feel, because it tells you something.

Sonnax wrote up a 6R140 that came in with an intermittent neutral. It drove fine on flat ground and lost drive on a grade. Line pressure spec is 90-260 psi, and during the fault it dropped to 0. When the tech removed the filter bolt, the filter dropped out on its own. The seal on the filter snout had no grip on the pump intake. On an incline the fluid shifted, the loose filter sucked air, and the pump lost prime. The fix was a more robust O-ring on the filter neck, not a rebuild.

Sonnax notes this applies to any Ford transmission with a round filter intake and a seal on the filter snout. That is why I do three things on every 6R140 filter:

1. Check that the old seal came out with the filter and did not stay in the pump bore. A doubled-up seal will not let the new filter seat.
2. Lube the new O-ring with clean ATF. ATS and Mag-Hytec both call for this. A dry O-ring can roll or tear going in.
3. Push the new filter into place and feel for resistance. If it slides in with no drag at all, the seal is not doing its job. Do not bolt it down and hope.

Torque the 3 filter bolts to 97 lb-in (11 Nm), per the ATS install guide. That is about 8 ft-lb. These bolts go into the valve body, and they are small. This is not a job for an impact or an air ratchet. Mag-Hytec's instructions say hand tools only, and I agree.

Step 4: Pan back on at 80 lb-in

The stock pan gasket is reusable. ATS and BD both say so, and BD lists it as Ford BC3Z-7A191-B. Clean it, check it for tears, and reuse it if it is in good shape. If it is torn, cracked, or was leaking before you took it off, replace it.

1. Set the gasket on the pan and hold the pan up to the case. BD starts two bolts on opposite sides to hold it in place.
2. Start all 19 bolts by hand. Every one should turn in easily. Mag-Hytec suggests running a bolt into each case hole before the pan goes on to check for corrosion or debris in the threads.
3. Snug them in a crisscross pattern, then torque to 80 lb-in (9 Nm). ATS and BD both give this number for the 6R140 pan.
4. Reinstall the drain plug if you have not already. BD's heavy-duty pan specs its drain plug at 20 ft-lb. On the stock pan, the figure commonly quoted from Ford's workshop manual is 18 Nm (159 lb-in); I have not found that in a public Ford document, so confirm it in the service information for your year.

The most common pan leak I see on these trucks is overtightening. At 80 lb-in, someone who "just snugs it up" with a 3/8 ratchet is usually past spec and crushing the gasket. Use a torque wrench that reads in inch-pounds.

Step 5: Refill through the dipstick tube

Sonnax lists the refill quantities for the 6R140 by job:

Start with a little less than the listed amount. Pour it in through the dipstick tube, start the engine, and move the selector through every range. Hold each one for a few seconds so the clutch circuits fill, then return to PARK. BD and ATS both put this step in their instructions for the same reason: you cannot read the level until the hydraulic circuits have filled.

Step 6: Set the level hot

This is where most 6R140 services go wrong. ATF expands as it heats. A level that looks right on a cold dipstick will be high at operating temperature. Ford's 2014 Super Duty owner's manual says to check the 6-speed at 200-210°F (93-99°C), which it says usually takes about 19 miles of driving. Sonnax gives a slightly wider window of 196-216°F (91-102°C). Either way, the reading only counts when the fluid is hot.

1. Truck level, parking brake on, engine running.
2. Read transmission fluid temperature on a scan tool. Do not guess from idle time.
3. Move through all ranges, then back to PARK with the engine running.
4. Pull the dipstick, wipe it, reinsert it all the way, pull it again and read it.
5. Add in small steps. Sonnax says 0.24 L (half a pint). ATS says a quarter to half quart. Let it settle before you recheck.

Ford's manual also warns not to drive the truck if there is no fluid showing on the dipstick and it is above 50°F outside. Sonnax says do not overfill 6- through 10-speed Ford transmissions under any circumstance, because it can overheat the fluid. An overfilled unit churns and foams the fluid, and foamed fluid gives the solenoids soft, inconsistent pressure. That feels like a worn valve body when the hard parts are fine.

After the road test, check under the pan for seepage at the gasket and drain plug. ATS says to re-torque its deep pan bolts after the first warm-up. On a stock pan, I recheck the level hot and look for leaks. I also clear the adaptive tables so the TCM relearns on the new fluid.

How often, and when one service is not enough

Ford's normal maintenance schedule in the 2017 Super Duty owner's manual says to change the automatic transmission fluid and filter at 150,000 miles, on both gas and diesel trucks. ATS's install guide points out that Ford's figure is long, and recommends a full service every 30,000 miles, especially on trucks that tow. My shop practice is close to that: fluid and filter around 30,000 miles on any Super Duty that tows, plows, or idles a lot. That is my recommendation, not a Ford requirement.

Since a pan drop only changes about half the fluid, one service on a neglected truck mostly dilutes the old fluid. If what came out was dark, I do a second drain and fill a few hundred miles later instead of pushing a machine exchange. I do not add the filter again on the second one unless the first pan showed a lot of debris.

Know when to stop, though. If the pan showed metal or a lot of friction material, or the truck already slipped or flared before the service, fresh fluid will not bring it back. That is a valve body or clutch problem. Ford's service message 46451 updated the 2009-2017 6R80, 6R100 and 6R140 main control overhaul procedure and makes the point that not every valve body needs replacing: inspect the bores, springs and valves during diagnosis, and Ford points techs to General Service Bulletin G0000093 for a video on what to look for. Our 6R140 valve body wear guide and 6R140 problems guide cover what comes next.

Need parts for this job?

Our 6R140 parts page has the filter kit, MERCON LV service kits, stock-replacement and deep aluminum pans, and the valve bodies and solenoid kits for when the pan tells you the problem is bigger than the fluid. Checkout is on site.

FAQ

What is the torque spec for 6R140 transmission pan bolts?

The 19 pan bolts on a 6R140 torque to 80 lb-in (9 Nm) in a crisscross pattern, per the ATS and BD Diesel pan install instructions. That is under 7 ft-lb, so use a torque wrench that reads in inch-pounds. Overtightening is the most common cause of pan leaks on these trucks.

What filter does a 6R140 use?

2011-2019 Super Duty 6R140 units use the Motorcraft FT-187 filter, Ford part BC3Z-7A098-B. It is held by 3 bolts torqued to 97 lb-in (11 Nm). Lube the neck O-ring with clean ATF and make sure it has real resistance going into the pump intake.

Is the 6R140 pan gasket reusable?

Yes. The factory gasket, Ford BC3Z-7A191-B, is reusable according to both ATS and BD Diesel. Clean it and check it for tears. Replace it if it is torn, cracked, or was leaking before the pan came off.

How much fluid does a 6R140 take after a pan and filter change?

Sonnax lists 8.2 quarts (7.8 L) of MERCON LV after a pan drop with the stock pan, and 10.2 quarts if the valve body was removed. Deep pans take more: ATS lists 16-18 quarts with its pan and BD lists 14.2 quarts with its pan. Set the final level hot on the dipstick.

How often should the 6R140 filter be changed?

Ford's normal schedule in the 2017 Super Duty owner's manual calls for fluid and filter at 150,000 miles. ATS recommends a full service every 30,000 miles on trucks that tow, and my shop practice is about 30,000 miles on any Super Duty that tows, plows, or idles a lot.

Related guides

• 6R140 Fluid Type and Capacity
• Ford 6R140 TorqShift Problems and Service Guide
• 6R140 Valve Body Wear and Fix
• 6R140 vs. 5R110W Differences
• 6R80 Filter and Pan Service