Full set of friction and steel clutch plates for the Toyota UA80E and UA80F eight-speed, 2016-up Highlander, Camry V6, Avalon and Lexus ES 350.
Toyota's UA80E eight-speed (UA80F in AWD form) went into the Highlander and Sienna for 2017 and spread to the V6 Camry, Avalon and Lexus ES 350. When one comes in with dark, burnt-smelling fluid, a flare between gears, a soft and drawn-out shift, or a delayed engagement into Drive, the clutch packs are usually where the damage shows. This kit, part number ING-GN03966, is the friction plates and their mating steels for a UA80 overhaul - the wear surfaces, not the geartrain, seals or pistons. It weighs 2.27 lb and ships in a 16 x 11.5 x 3 inch box.
The UA80 gets its eight ratios from two Ravigneaux-type planetary sets with no bands and no sprags. Four rotating clutches (C1 through C4) and two brakes do all the work, and every gear is two elements applied and four released. That means every upshift and downshift is a clutch-to-clutch handoff timed by direct-acting solenoids. There is no one-way clutch to cover a sloppy release, so if a pack is glazed or its clearance has grown, the computer sees the ratio change run long and the driver feels flare or slip. The converter can also lock in any gear, including first, so the converter clutch shares the workload with the packs.
Scan for codes and look at the freeze frame, then put a gauge on the unit. GEARS lists UA80 line pressure at 73-102 psi at idle and 189-232 psi forward stall, and points to C1 or B2 leakage when pressure is low only in Drive, and C3 or B2 when it is low only in Reverse. Pressure that is high or low in every range is more often the SLT line pressure solenoid or the regulator valve - GEARS calls the SLT the most common UA80 failure, and a weak SLT can starve clutches and set codes for other solenoids. Sonnax ties burnt C1 clutches to delayed engagement and burnt C4 clutches to 4th and 6th gear complaints, and warns that a worn lube flow control valve can cook the fluid and take out clutches and planetaries. Fix the cause or new plates will burn the same way.
Listed for the Toyota UA80, UA80E and UA80F eight-speed in the Highlander, Sienna, Camry, Avalon and Lexus ES 350. The listing reads 2016 and up, but the UA80 entered production in 2017 model-year vehicles, so there is no 2016 application. The listing also names the Camry 2.5L; most four-cylinder cars use the related UB80, which has its own plate kit, so read the transmission code on the case or the build label before ordering. If you are not sure which unit you have, send us the year and VIN. More overhaul parts are on our rebuild kits page.
Refill with genuine Toyota WS ATF - the UA80 has no dipstick, so set the level at the check plug with the engine running in Park and fluid at 20 C (68 F) or warmer, until it just drips. A compatible option is Idemitsu TLS-LV WS fluid. After the rebuild, clear adaptives with a scan tool and drive the unit through every gear to let it relearn.
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The 2016 Highlander used the older six-speed. The UA80 eight-speed started with the 2017 Highlander and Sienna, so this kit is for 2017 and later units even though the listing says 2016-up.
Toyota WS (World Standard) ATF. There is no dipstick; the level is set at the check plug with the engine running in Park and the fluid at 20 C or warmer, until it just drips.
The SLT line pressure solenoid, any seals and gaskets you disturb, and worn bearings such as the drive transfer gear bearings. Check the lube flow control valve bore in the valve body too, since a worn bore overheats the fluid.
Usually not. Most 2.5L four-cylinder Camry, RAV4 and Avalon models use the UB80, which has a different plate kit. Check the transmission code on the case or send us your VIN.
Yes. Reset the adaptive values with a scan tool and drive through all eight gears with light and moderate throttle so the computer relearns fill times for the new plates.
