U660F Master Rebuild Kit 2014, new and ready to install. Fits the U660F. Ships fast from the USA.
A 2014 all-wheel-drive Toyota or Lexus V6 with a U660F is now old enough that the original clutch packs are reaching the end, especially on vehicles that towed, carried families on long trips, or never had a fluid change. If yours slips on the highway, hesitates before it picks up Drive, or shows black fluid with clutch dust on the magnets, this master rebuild kit for the 2014 U660F is the overhaul package for that one model year. It is cross-referenced to the U660E, the front-drive version of the same transaxle.
Inside the case, two clutches (C1, C2), three brakes (B1, B2, B3) and a one-way clutch produce all six gears, according to ATSG's component chart. Linear solenoids feed each element, and the TCM keeps learning and adjusting those pressures as the plates wear. By the 2014 model year Toyota had already published its 2013 WS fluid-level bulletin for these units, but a correct fill does not stop normal clutch wear. Once the TCM runs out of room to adjust, you feel it as flare and slip. This kit replaces the frictions and steels and supplies the seals and gaskets to reseal the unit, so every pack starts fresh.
Rule out the cheap causes first. Toyota's 2013 bulletin on WS fluid level, revised in 2016, covers both the U660F and U760F and requires the level to be set hot through the overflow plug; a unit that is low because someone checked it cold can slip like a worn one. Our U660E fluid type and capacity guide covers the procedure and capacity. Next, confirm the complaint is slip and not converter shudder. Shudder in the 25-50 mph range that disappears in Manual 3rd is the lockup system, which the U660E and U760E problems guide walks through. If the fluid is right and the slip remains, the unit needs to come apart.
This listing is for the 2014 U660F. The same transmission name covers several vehicles and years, and some internal parts changed over the run, so check the identification tag on your case and count the plates as they come out. The four-cylinder U760F is a separate unit and does not take this kit. If you want us to confirm, send your year, model and VIN. All U660-family parts are on the U660E and U660F collection page, including the 2006-2011 U660F master rebuild kit for earlier vehicles.
| Fits | U660F 2014 |
| Part type | Master Rebuild Kit |
| Condition | New |
| Brand | OEM |
| Reference | U660E |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is listed for the 2014 U660F. Earlier and later units can differ in plate counts and some seals, so confirm your tag and count the plates as you disassemble, or send us your VIN.
The kit is cross-referenced to the U660E, so the soft parts are shared. Order by the transmission tag on your case to be sure you have the right listing.
Toyota Genuine ATF WS. There is no dipstick, so set the level hot through the overflow plug using Toyota's WS level-adjustment bulletin for U660E/F and U760E/F transmissions.
Any scored drum, a worn sprag, and worn valve body valves. Many rebuilders also install a shift kit and replace the filter at the same time.
Only after the old adaptive values are cleared. Use a scan tool that runs Toyota's ECT reset; a battery disconnect does not clear the learned pressures. Then drive it from cold to fully warm.
