U660E Clutch Drum, used and ready to install. Fits the U660E. Ships fast from the USA.
If your V6 Camry, Avalon, Lexus ES350, Sienna or Venza has a U660E that came apart with a cracked drum, a chewed piston or a worn input shaft, this is the hard part you need to put it back together. It is a genuine Toyota C1/C2 clutch drum assembly, Toyota number 35650-33010, removed from a running U660E. The drum housing, input shaft, splines, gear teeth and both pistons are sound and reusable. The clutch pack that came with it is original and the steels show heat discoloration, so treat this as the drum, shaft and pistons you build on, and plan on fresh frictions and steels before it goes into your case.
ATSG's U660E service information lists only two driving clutches in this transaxle, C1 and C2, and both are housed in this one drum. On ATSG's component application chart, C1 (forward) is applied in first through fourth gear and in manual first, and C2 (direct) is applied in fourth, fifth and sixth. Fourth gear is the 1.000 ratio, where both packs lock together. Reverse uses neither of them. In practice that means this drum carries engine torque in every forward gear the transmission has, which is why a failure here is so often a complete loss of Drive rather than one bad shift.
Rule out fluid and electronics first. Gears Magazine notes that the wrong fluid can cause flaring shifts on these units and that the case-mounted TCM on the U660E fails with U0402 and solenoid codes that can look mechanical. Then put gauges on the C1 and C2 pressure taps that ATSG identifies on the case. Good pressure with slip means the problem is inside the drum. Low pressure on both taps plus low line pressure points to the pump or valve body instead. Our U660E and U760E problems guide covers the valve body wear that causes those low readings.
This assembly fits the front-wheel-drive U660E six-speed behind the 3.5L V6. Gears Magazine dates the U660E to the 2007 Camry and ES350, the 2008 Avalon and the 2009 Venza; it was also used in the Sienna and the front-drive Highlander and RX350. The same drum is used in the all-wheel-drive U660F. Toyota revised this drum during production, and a late 2010-and-up U660E drum is listed separately, so compare your old drum to the photos: input shaft length, spline count and the sealing ring grooves must match. The four-cylinder U760E uses a different drum. If you are not sure, send us your year, model and VIN before ordering. Browse every part for this family on the U660E collection page.
If a pressure test showed weak solenoid output, replace the U660E solenoid kit while the pan is off.
| Fits | U660E |
| Part type | Clutch Drum |
| Condition | Used |
| 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 includes the drum, input shaft, pistons, clutches and steels, but the clutch pack is original and the steels show heat discoloration. The drum, shaft and pistons are sound; install new frictions and steels before final assembly.
The assembly is Toyota 35650-33010, the C1/C2 clutch drum with input shaft used in the U660E and U660F.
Per ATSG, C1 applies in first through fourth and manual first, and C2 applies in fourth through sixth. Reverse does not use either clutch, so a failed drum often leaves Reverse working with no Drive.
Toyota revised the drum during the run, and a separate 2010-and-up version exists. Match the input shaft length, splines and ring grooves to your old drum, or send us your VIN and we will confirm.
Toyota WS fluid, with the level set hot through the overflow plug per Toyota bulletin T-SB-0036-13, followed by clearing the transmission adaptive values with a scan tool.
