TF-81SC Valve Body 2006-2008, remanufactured and ready to install. Fits the TF-81SC. Ships fast from the USA.
The 2006-2008 model years are when the Aisin TF-81SC six-speed moved from Ford's big Five Hundred sedan into the V6 Fusion, Mercury Milan and Lincoln Zephyr, so a lot of the units on the road today come from exactly this window. If your car from these years flares between third and fourth, slips in the top three gears, coasts down into a moment of neutral, or keeps storing gear ratio codes, this remanufactured TF-81SC valve body for 2006-2008 replaces the worn hydraulic control unit that most often causes those complaints.
The TF-81SC shifts clutch-to-clutch: for every gear change one element has to let go at the same instant another one grabs. The transmission computer decides the timing, but the valve body carries it out. Linear solenoids on the body push oil into clutch control valves, and those valves set how fast pressure builds on the clutch that is coming on. The main pressure regulator sets line pressure for the whole unit. Sonnax's layout of this valve body shows how many failure points sit in it: the main regulator and boost valve behind erratic or low line pressure, the solenoid modulator behind ratio codes, and the C1/K1 clutch control valve behind burned clutches and flared shifts. As the aluminum bores wear, oil leaks past each spool and the pressure the computer commands is no longer what reaches the clutch.
Left alone, a leaking clutch control circuit keeps a clutch partly applied and slipping, which is how a valve body problem turns into a burned C1 or K1 clutch pack.
Begin with the fluid. Check the level hot at the check plug and look at the condition: clean or only slightly dark fluid with a flare or ratio code points at the valve body, while heavy friction material on the magnet means the clutches are already damaged. Next, rule out the electrical side. Our solenoid multimeter test shows how to check each solenoid's resistance at the connector. If the solenoids pass and the codes keep returning, the leak is in the valve body. Our guide to Aisin harsh and delayed shifts covers the shift-quality complaints that share these causes.
This listing covers TF-81SC transmissions in 2006-2008 vehicles. The TF-81SC is also called the AF21 by Ford and the AW6A-EL by Mazda. Applications in these years include the 2006-2007 Ford Five Hundred and Mercury Montego with the front-drive six-speed (the all-wheel-drive versions used a CVT instead), the V6 Ford Fusion and Mercury Milan, the 2006 Lincoln Zephyr and the 2007-2008 Lincoln MKZ, and the Mazda CX-7 and CX-9. Four-cylinder Fusions and Milans used a different automatic, so this body will not fit them. The Volvo-style TF-80SC valve body looks very similar but is not interchangeable. Match the casting number, the solenoid layout and the harness connector against your old unit, or send us your year and VIN and we will confirm before it ships. If your car falls just outside this range, compare the 2005 TF-81SC valve body and the 2007-2009 TF-81SC valve body, or browse our Aisin transmission parts collection.
The valve body comes out with the transaxle in the car. Drain the fluid, remove the pan and filter, and photograph the solenoid connectors before unplugging them. Remove the valve body bolts in stages and keep track of each bolt's length and location. When you fit the new body, make sure the manual valve engages the detent lever, start every bolt by hand, and torque them evenly from the center outward so the casting seats flat. Install a new filter and pan gasket; our TF-80SC/AF21 filter and gasket kit covers this unit. If your car also has a converter shudder complaint, replace the TF-81SC TCC solenoid while you have access. Refill with JWS 3309-type ATF, set the level hot at the check plug, then clear the adaptive values and complete a relearn drive before you judge the shifts. Our adaptive relearn guide explains what to expect over the first few drives.
| Fits | TF-81SC 2006-2008 |
| Part type | Valve Body |
| Condition | Remanufactured |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It fits Fusions with the V6 and the Aisin six-speed automatic. Four-cylinder Fusions used a different automatic transmission. Check the transmission code on the door label or send us your VIN and we will confirm.
No. The all-wheel-drive Five Hundred and Montego used a CVT. Only the front-drive six-speed cars use the TF-81SC and this valve body.
Yes, if the clutches are still healthy and the flare comes from leaking clutch control or solenoid feed circuits. If the pan shows heavy friction material, the clutches are worn too and the unit needs an overhaul.
The gear ratio codes P0729, P0734 and P0735 are the common ones, often along with kickdown slip, once the solenoids have tested good.
JWS 3309-type ATF, the fluid listed in the owner's manual for these cars. Set the level hot at the check plug.
Yes. Clear the transmission adaptive values and complete a relearn drive so the computer stops compensating for the old, worn valve body.
