U660E Planetary 2010, remanufactured and ready to install. Fits the U660E. Ships fast from the USA.
Owners of a V6 Camry, Avalon, Venza or Lexus ES350 often land here after a shop tells them the U660E six-speed is slipping inside. Although the store files this item as a U660E planetary for 2010, it is a remanufactured forward/direct clutch drum: the late-style C1/C2 assembly on a 9-1/4 inch input shaft, rebuilt with new clutches, steels and pistons. It is the same drum the V6 front-drive and AWD units share. This page explains what it fixes and what to check in a high-mileage U660E before you put a $629.99 assembly into it.
Gears Magazine traces the U660E to the 2007 Lexus ES350 and Camry, then the 2008 Avalon and the 2009 Venza, always behind the V6. ATSG's chart shows it uses two driving clutches, C1 and C2, and both are inside this drum. C1 drives the gear train in first through fourth, and C2 is applied from fourth through sixth, so every forward gear depends on this one assembly holding. The planetary gearsets behind it multiply torque; this drum decides when they get it. According to the listing, it is built with four new forward and three new direct frictions, their steels, a new forward piston with retainer, and a new direct piston with its retainer and housing.
Two U660E problems can look similar and need ruling out. Gears Magazine reports TCM failures on the U660E, whose module bolts to the unit, setting U0402 and circuit performance codes. It also describes case wear at the main gear train bearing bore from the V6's torque and the low 3.300 first gear, which causes centerline problems, bushing wear and, in extreme cases, a broken converter input spline and no movement.
Scan every module and use Check Mode, check that the fluid is WS and set to the level procedure in our U660E/U760E service guide, then read pressure at the C1 and C2 case ports ATSG identifies. Once the unit is apart, inspect the case bearing bore before anything else: Gears Magazine says if the outer bearing race moves at all, the case must be repaired or replaced. A new drum in a worn case will be damaged by the same misalignment that ruined the old one.
The listing names U660E and U660F, lists both FWD and AWD drive types, and calls the drum the late assembly for 2010-up, while its description says 2007 and up. Lay your old drum next to the photos and count clutch positions; four forward and three direct is the V6 drum. Do not confuse it with the four-cylinder U760E drum. If anything does not line up, send your year and VIN. Browse the full U660E parts page for the rest of the build.
Air-check both pistons and confirm pack clearance with a dial indicator. Replace the shaft sealing rings, bushings, thrust washers and bearings around the drum. The U660E master rebuild kit handles the remaining frictions and seals, and if valve body bore wear showed up in testing, the U660E valve body is worth doing in the same visit. Refill with Toyota WS fluid, about 6.57 liters total including the differential per ATSG, then set the level hot and reset adaptive memory with a scan tool that truly supports the ECT reset.
| Fits | U660E 2010 |
| Part type | Planetary |
| Condition | Remanufactured |
| 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.
No. Despite the listing name it is the remanufactured forward/direct (C1/C2) clutch drum on its input shaft, loaded with new frictions, steels and pistons.
Gears Magazine lists the 2007-up Lexus ES350 and Camry V6, the 2008-up Avalon and the 2009-up Venza. ATSG's application list adds V6 Highlander, RAV4, Sienna and Lexus RX350 models.
It can. U660E transmission control modules mount on the unit and fail with U0402 or circuit performance codes. Swapping in a known-good module, with its compensation code entered, is the quick test.
The main gear train bearing bore. If the outer bearing race moves at all, repair or replace the case, or the centerline wear will damage the new parts.
ATSG lists 6.57 liters (6.94 US quarts) of Toyota WS including the differential for a dry unit. Always finish with the hot level check rather than a set amount.
