U660E Planetary 2007, used and ready to install. Fits the U660E. Ships fast from the USA.
This is the budget route for a Toyota or Lexus U660E six-speed that needs its underdrive planetary replaced: a used, original-equipment Toyota underdrive planet set, cleaned and inspected, with four pinions and a 66-tooth sun gear. It suits a rebuilder or DIY owner who has the unit apart on a 2007-up V6 Camry, Avalon, Venza, Highlander or Lexus ES350, found a noisy or damaged carrier, and wants a factory part without paying for a new set.
ATSG describes the U660E gear train as a Ravigneaux set working with a separate U/D planetary set and a counter gear. Its data lists the U/D set as a 66-tooth sun gear, 21-tooth pinions and a 110-tooth ring gear, which matches the 66-tooth sun on this assembly. Between them, those two gearsets produce every one of the six forward ratios, from a 3.300 first gear down to a 0.608 sixth. The planet carrier and its pinions carry torque continuously while the vehicle is moving, which is why pinion bearings and thrust faces are wear items on a high-mileage unit.
Before buying any hard part, find the cause. Gears Magazine reports that the U660E commonly wears its case at the main gear train bearing bore under V6 torque and the low first gear, creating centerline problems and internal bushing wear. If that bearing's outer race moves in the case, the case must be repaired or replaced first; otherwise the replacement planet set inherits the same misalignment. Shift flare, harsh downshifts and codes are usually valve body, solenoid or TCM problems instead, and our U660E and U760E service guide covers those checks.
The listing describes this as a used Toyota U660E/U760E underdrive planet set for 2007 and up and lists Camry V6 2007-2017, Avalon 2008-2018, Highlander 2008-2016, Lexus ES350 2007-2018 and RX350 2010-2015, plus four-cylinder Camry and other models. It also warns that the part is shared across the V6 U660E/F and four-cylinder U760E/F families and must be checked against your unit. New aftermarket sets for those two families are sold under different references, so do not assume interchange: count the pinions, count the sun gear teeth, and compare the shaft splines with your old part. If you are unsure, send your year and VIN or the transmission tag. New options are the new U660E underdrive set and the new U760E underdrive set; everything else is on our U660E parts page.
Because this part is used, inspect it yourself before it goes in: spin every pinion and feel for roughness, check pinion end play, and look at the sun gear splines and thrust faces. Replace the thrust washers, thrust bearings and bushings it runs against, since those are not included. Pair it with a master rebuild kit with frictions and steels and, if the pistons are hard or leaking, a U660E bonded piston set. Fill with Toyota WS fluid; ATSG lists 6.57 liters for a dry U660E including the differential. Set the level hot per our U660E fluid guide and reset adaptive values afterward.
| Fits | U660E 2007 |
| Part type | Planetary |
| Condition | Used |
| Brand | OEM |
| Reference | U760E |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Used. It is an original-equipment Toyota underdrive planet set that has been cleaned and inspected. New aftermarket sets are listed separately for the U660E and U760E.
Count the pinions (four) and the sun gear teeth (66) and compare the shaft splines to your old part. ATSG lists a 66-tooth U/D sun gear for the U660E. When in doubt, send your year and VIN.
The listing says the part is shared across the U660E/F and U760E/F families but tells buyers to verify against their unit. Compare it to your old set before installing.
The thrust washers, thrust bearings and bushings around the gearset, plus frictions and seals from a master rebuild kit. Check the case bearing bore for wear first.
No. It is a mechanical part. After the rebuild, reset the transmission adaptive values with a scan tool that supports the ECT reset.
