U660E Master Rebuild Kit, new and ready to install. Fits the U660E. Ships fast from the USA.
A V6 Camry, Avalon, Venza or Lexus ES350 that slips, flares on the 2-3 or 3-4 shift, or has blackened fluid full of clutch material is past the point of a fluid service. The U660E has to be torn down, and this master rebuild kit is the soft-parts package that goes back into it. It is listed for the U660E front-wheel-drive transaxle and cross-referenced to the U660F all-wheel-drive version, so the frictions, steels, gaskets and seals cover both.
The U660E is Aisin's six-speed for Toyota's 3.5L V6. ATSG's specifications for a 2007 Camry list a 3.300 first gear and a 0.608 sixth, and those six ratios come from just six holding elements: clutches C1 and C2, brakes B1, B2 and B3, and the F1 one-way clutch. Because each element works in more than one gear, one worn pack causes problems in several ranges at once. The TCM masks early wear by raising pressure and adjusting shift timing, which is why these units often feel fine and then deteriorate quickly once the adaptive limits are reached. The kit renews the friction and steel plates in those packs and supplies the gaskets and seals to reseal the case, pump and valve body. The kit photo shows frictions, steels, separator plate gaskets, the pan gasket, lip seals, O-rings and sealing rings; a filter is not shown, so plan on adding one.
Not every U660E complaint needs a rebuild. Gears Magazine points out that harsh coasting downshifts with no codes often come from a carbon-fouled throttle body or a slow MAF sensor, and that the wrong fluid causes shudder, harsh shifts and solenoid codes by itself. A U0402 code points at the transaxle-mounted TCM, not the clutches. Our U660E and U760E problems and service guide covers isolating converter shudder in Manual 3rd, and the U660E fluid capacity guide shows the hot overflow level check. If the level is right, the fluid is burnt and the slip is still there, the clutches are done.
This kit is listed for the U660E with the U660F as a cross-reference, without a narrower year range. Gears Magazine dates the U660E from the 2007 Lexus ES350 and Camry, the 2008 Avalon and the 2009 Venza, always behind the V6. Four-cylinder versions of the Camry, Venza and Highlander use the U760E and need a U760E master rebuild kit instead. Confirm the transmission tag, compare plate counts during teardown, or send us your year, model and VIN. Everything we carry for this unit is on the U660E collection page.
| Fits | U660E |
| Part type | Master Rebuild Kit |
| Condition | New |
| Brand | OEM |
| Reference | U660F |
| 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 cross-referenced to the U660F all-wheel-drive version, so the internal soft parts match. Confirm the tag on your transmission case before ordering.
Toyota's 3.5L V6 models, starting with the 2007 Camry and Lexus ES350, then the 2008 Avalon and 2009 Venza. Four-cylinder models use the U760E, which takes a different kit.
A filter is not shown in the kit photo. Add our U660E filter and oil pan gasket kit so the unit goes back together with a clean filter.
ATSG lists 6.57 liters, about 6.94 US quarts, total including the differential. Use Toyota WS only and set the level hot through the overflow plug.
Not for that code alone. U0402 points at the TCM that bolts to the U660E and plugs into the solenoid connector. Rule the module out before tearing the transmission down.
The filter, any worn bushings, and the clutch drum if its bores or splines are damaged. A shift kit and new solenoids are also worth considering if the valve body shows wear.
