U660F Overhaul Kit, new and ready to install. Fits the U660F. Ships fast from the USA.
When a V6 Highlander, RX 350, Sienna or Camry with the U660 six-speed slips, flares or engages late and the fluid comes out dark, the clutches and the seals behind them usually both need replacing. This kit is built for that full rebuild. It is listed for the U660F all-wheel-drive transaxle and the front-drive U660E, and as pictured it carries the friction plates and steel plates along with the valve body gaskets, pan gasket, seals and sealing rings, so one box covers the soft parts and the clutch packs.
The U660F is the all-wheel-drive version of Aisin's U660E six-speed for the 3.5L V6. The gear train and clutch packs are shared with the U660E; the F version adds the transfer drive to the rear driveline. Each shift applies a clutch or brake pack by pressurizing a piston, and the lined frictions grip the steels to hold or drive a member of the gear set. When the friction material wears thin or glazes, the pack slips even with good pressure. When the seals harden, the pressure never gets there. This kit replaces both sides of that problem. Bushings, the filter and hard parts such as drums and the pump are not shown in the kit and should be inspected and ordered separately.
Start with the fluid level, because the U660 is checked hot at the overflow plug, not with a dipstick, and the wrong level or the wrong fluid can mimic slipping. Rule out torque converter lockup shudder at 25-50 mph by holding Manual 3. Gears Magazine also flags case bearing-bore wear and converter input-spline breakage on this family, so look for those when the unit is apart. If slip appears in specific gears and the pan has clutch debris, a rebuild with new frictions is justified. Our U660E and U760E problems guide lists the tests to run first.
The kit is listed for U660E and U660F transaxles in 2006-2011 V6 3.5L applications, including the Camry, Avalon, Sienna, Highlander and Venza V6, and the Lexus ES 350 and RX 350. Some later units and four-cylinder models built on the related U760E use different clutch counts or seal details, so confirm the model code on your transaxle tag and compare the kit photo with your parts, or send us your year and VIN before ordering. Other parts for the family are on the U660E and U760E parts page.
| Fits | U660F |
| Part type | Overhaul 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 goes beyond a plain overhaul kit. As pictured it includes friction plates and steel plates along with the gaskets, seals, sealing rings and pan gasket, which is what most shops call a master rebuild kit.
Yes, it is listed for both the U660E and the U660F, which share the same clutch packs and sealing parts inside the main case. Confirm against your transaxle tag before ordering.
The kit is listed for 2006-2011 applications. Later units may differ, so send us your VIN and we will check the match before it ships.
No filter is shown in the kit. Add a U660E filter and pan gasket kit so the rebuilt unit starts with clean filtration.
Toyota WS ATF only. Fill the unit, then set the final level hot through the overflow plug using Toyota's WS level procedure and reset adaptive values with a scan tool.
