U660F Planetary 2010, remanufactured and ready to install. Fits the U660F. Ships fast from the USA.
This listing is filed as a U660F planetary for 2010, but the part you receive is not a gearset. It is a remanufactured late-design forward/direct clutch drum for the U660F and U660E six-speed, the C1/C2 assembly, complete on its 9-1/4 inch input shaft. We want you to know that before you order, because a planetary failure and a drum failure feel different from the driver's seat and need different parts. If your all-wheel-drive V6 Toyota or Lexus slips, flares or will not move forward, this is likely the assembly you need; if it whines, read the next sections first.
ATSG lists the gear train of this family as one Ravigneaux planetary set plus an underdrive planetary set. Those gearsets create the ratios, 3.300 in first down to 0.608 in sixth on a 2007 Camry. They do not decide which ratio you are in. That job belongs to the clutches, and the two driving clutches, C1 and C2, are housed in this drum. Per ATSG's application chart, C1 is on in first through fourth and C2 is on in fourth through sixth. The U660F is the AWD version of the U660E and shares this layout; the transfer drive only matters after the gear train. The listing states the drum comes loaded with new forward and direct frictions (four forward, three direct), matching new steels, a new forward piston and retainer, and a new direct piston, retainer and housing.
Start outside the case. Gears Magazine stresses scanning all modules and using Check Mode, and notes that wrong or tired fluid alone causes flaring shifts and pressure solenoid codes on this family. Check and set the WS level hot as Toyota's bulletin describes; our U660E fluid type and capacity guide covers the temperature window. Next, read pressure at the C1 and C2 test ports ATSG shows on the case. A clutch that slips with good pressure has burned frictions; one with low pressure has a leak in the drum, its rings or pistons. The U660E/U760E problems guide lists the valve body wear that can mimic both.
The listing describes this as the late assembly for 2010-up units, while its description also says it serves 2007 and up, so compare it with your old drum rather than going by year alone. Count the clutch positions: four forward and three direct identifies the V6 U660E/U660F drum. The four-cylinder U760E drum is a different part even though it looks close. Match the shaft length and the drum features in the photos, or send us your year and VIN. All U660-family parts, including AWD-specific pieces, are on the U660E/U660F transmission page. If your teardown really does show a damaged gearset, see the U660E front planetary carrier assembly instead.
Because the drum arrives built, you skip stacking and clearancing its packs, but verify the C1 and C2 clearance with a dial indicator anyway and air-check both pistons before it goes in. Install new sealing rings on the support it rides in, inspect the bushings it turns on, and replace the thrust bearings and washers at each end. The rest of the unit still needs seals and frictions for the brakes, which the U660F master rebuild kit supplies. Fill with Toyota WS fluid only, set the level hot, and run the ECT reset with a tool that genuinely performs it before road testing.
| Fits | U660F 2010 |
| Part type | Planetary |
| Condition | Remanufactured |
| 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.
The listing name came through under the wrong part type. The item is the remanufactured forward/direct (C1/C2) drum on its input shaft, and this page describes that part so you can order with the facts.
The source listing names both U660E and U660F and lists AWD and FWD drive types. The drum is shared; confirm by counting four forward and three direct clutch positions in your old drum.
Per the listing: new forward and direct frictions (four and three), new steels, a new forward piston and retainer, and a new direct piston, retainer and housing, assembled on the 9-1/4 inch shaft.
Probably not. A speed-related whine with clean shifts usually comes from planetary pinion bearings or other gear-train bearings, not the clutch drum.
Sealing rings, bushings, thrust bearings and washers around the drum, plus a rebuild kit for the remaining clutches and brakes. Use Toyota WS fluid and clear adaptive memory afterward.
