U660E Banner Rebuild Kit 2007-2011, new and ready to install. Fits the U660E. Ships fast from the USA.
For a 2007-2011 Lexus RX350 or ES350 3.5L with a U660E that slips, shifts late or leaks, this is the value route to a proper overhaul. The kit pairs the transmission overhaul set of seals and gaskets with a standard set of new friction plates. It does not include pistons, so it suits a unit whose original clutch pistons are still pliable and undamaged once it is apart. If they are not, we also carry a version of this kit with late C2 pistons.
The U660E is a six-speed front-drive transaxle that Toyota uses behind its V6 engines; Gears Magazine dates its debut to the 2007 ES350 and Camry. Shifts happen when the computer sends regulated pressure to a clutch or brake piston, and that piston clamps a pack of friction and steel plates. Over time the friction lining wears thin and glazes, and the rubber seals on pistons, the pump and the case harden and leak. The two problems feed each other: lost pressure lets clutches slip, slipping makes heat, and heat finishes off the seals. A banner kit resets both sides of that cycle with new sealing and new friction lining, while you reuse the pistons, steels and hard parts that pass inspection.
Many U660E complaints are fixed without a teardown. Low fluid, a non-WS fluid, worn valve body bores and the torque converter clutch all produce shift complaints that look like worn clutches. Sonnax's U660E vacuum test guide lists the lockup control valve and lockup control boost assembly as critical wear points that cause slip codes, rpm fluctuation and overheated fluid. Set the level correctly first using our U660E fluid type and capacity guide, then follow the diagnostic steps in our U660E and U760E service guide. A slip on a correct fill with debris in the pan means the clutches are done.
The listed applications are the U660E in the 2007-2011 Lexus RX350 3.5L and the 2007-2011 Lexus ES350 3.5L. All-wheel-drive versions use the U660F instead, and the RX350 has used more than one transmission across these model years, so read the code on the transmission plate before you order. If it is not plainly U660E, send your year, model and VIN and we will confirm. The photo shown is representative of the kit. See the full lineup on our U660E and U760E parts page.
With the unit apart, inspect each piston's rubber for cracking, flat spots or swelling; any doubt there is the reason to step up to the piston kit. Measure the steels and replace blued or warped ones, and check the one-way clutch; a worn sprag can be replaced with a U660E sprag clutch. Soak the new frictions in WS fluid before assembly and set each pack clearance to specification. If the converter clutch has been slipping, a mechanically worn U660E TCC solenoid is worth replacing while the valve body is off.
Use only genuine Toyota WS fluid, part number 00289-ATFWS per Toyota's bulletin, and set the level at the overflow plug with the fluid between 185 and 194 F. Clear the adaptive memory afterward with a tool that can run Toyota's ECT reset, then give the computer a full cold-to-hot drive to relearn.
| Fits | U660E 2007-2011 |
| Part type | Banner Rebuild Kit |
| Condition | New |
| Brand | OEM |
| Reference | RX350 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. It contains the overhaul seal and gasket set plus friction plates. Reuse pistons and steels only if they pass inspection; otherwise buy the piston version of this kit and new steels.
It is listed for the 2007-2011 RX350 3.5L with the U660E. AWD models use the U660F and the RX350 used other transmissions in some years, so confirm the code on the transmission plate or send us your VIN.
Probably not by itself. That shudder is most often torque converter lockup, lockup valve wear or fluid condition. Drive in Manual 3, which disables flex lockup, to separate it from clutch wear.
Toyota WS, part number 00289-ATFWS. Universal fluids that do not meet the WS specification can cause shudder and shift complaints on this transmission.
Yes. Clear the stored adaptive values with a capable scan tool using Toyota's ECT reset, then drive from cold to fully warm so the shift timing is relearned on the new clutches.
