Replaces the burnt clutch frictions in a Toyota UB80E eight-speed transaxle - fits Camry, Avalon and RAV4 2.5L plus Lexus ES350 3.5L AWD.
If your 2018-2020 Toyota Camry 2.5L, 2019-2020 RAV4 or Avalon 2.5L, or 2019-2020 Lexus ES350 AWD has started flaring between gears, taking its time to engage Drive, or shuddering under light throttle, the clutch packs inside the Aisin UB80E / UB80F eight-speed are the usual place the trouble ends up. This kit is the friction plate set, part number W197880E, for an overhaul of that transaxle. It is frictions only - steels, seals, gaskets and the filter are separate - so it suits a builder who already has the unit apart and knows what else it needs.
The UB80E (front drive) and UB80F (all-wheel drive) build all eight forward ratios and reverse by applying clutches and brakes in pairs, with the valve body steering line pressure to each pack through linear solenoids. Every shift is one pack releasing while another applies, so the friction lining has to grab cleanly and hold under full engine torque without slipping. When a pack is starved of pressure, or its lining is glazed or burnt, the computer sees the ratio change take too long and the driver feels flare, slip or a bang as it finally locks up. Sonnax's valve body notes for this family tie a burnt C1 clutch to delayed engagement and poor shift quality, and a burnt C4 clutch to 4th and 6th gear shift complaints - the two packs that most often come out black.
Pull a fluid sample first. Brown fluid that smells scorched, plus lining debris in the pan, means at least one pack is cooked and a teardown is coming. Our ATF color and smell chart shows what each condition looks like. Next, check the fluid level properly - these units are checked hot through the overflow plug, and a low level alone can cause delayed engagement. If level and fluid look right, work through the Aisin harsh and delayed shift walkthrough; on the UB80 a worn pressure regulator or a sticking solenoid can mimic a slipping clutch and is cheaper to fix than a rebuild.
The listed applications are Toyota Camry 2.5L 2018-2020, Toyota Avalon 2.5L 2019-2020, Toyota RAV4 2.5L 2019-2020 and Lexus ES350 3.5L AWD 2019-2020, covering both UB80E and UB80F. Read the transmission tag on the case before ordering. The UA80E / UA80F used behind other Toyota and Lexus engines looks similar from the outside but its clutch stacks are different, so a UA80 friction set will not drop into a UB80. Later model years are not on the listed fitment; if your vehicle is a 2021 or newer, send us the year and VIN and we will check it before it ships. See all of our Aisin parts on the Aisin collection page.
Not sure whether to rebuild or swap the whole unit? Our rebuild versus replacement cost breakdown lays out where the money goes.
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No. The UA80E / UA80F shares a lot of design with the UB80 family, but the clutch stacks and plates are different. This set is for the UB80E and UB80F only. Check the tag on the case before ordering.
The listed fitment is 2018-2020 Toyota Camry 2.5L, 2019-2020 Toyota Avalon 2.5L, 2019-2020 Toyota RAV4 2.5L and 2019-2020 Lexus ES350 3.5L AWD. For 2021 and newer vehicles send the year and VIN so we can confirm before shipping.
No. This is the friction plate set only. Reuse steels only if they are flat and free of heat marks, and buy an overhaul gasket and seal kit plus a filter for the same job.
Toyota WS (World Standard) ATF. Soak the new frictions in WS before assembly and refill with WS, then check the level hot at the overflow plug.
Yes. Clear codes and run the Toyota initialization and transmission learning procedure with a scan tool that supports it. Without it the computer keeps the old fill values and shifts can be harsh or soft until it adapts.
