U250E Overhaul Kit 2005, new and ready to install. Fits the U250E. Ships fast from the USA.
A four-cylinder 2005-2009 Camry, a 2006-2009 Camry Solara or a 2009-2014 Matrix 2.4L that leaks transmission fluid, takes a second or two to drop into Drive on a cold morning, or flares on the 2-3 shift is a U250E that is losing its seals. This is a new aftermarket overhaul kit for the Toyota U250E, industry number 26512GSX, cataloged for 2005-up units. It is the budget soft-parts kit for a rebuilder who has the transaxle on the bench and needs a fresh set of gaskets, seals and sealing rings to put it back together.
The U250E is Aisin's five-speed front-wheel-drive transaxle, built around three clutches (C0 direct, C1 forward and C2 reverse input), an underdrive clutch, three brakes and one-way clutches, with a 3.943 first gear and a 0.703 overdrive fifth. Every one of those clutches and brakes is applied by oil pressure behind a sealed piston, and the rotating clutches get their oil through sealing rings that ride in steel and aluminum bores. When the rubber hardens and the rings wear, apply pressure leaks away before it reaches the piston. The clutch fills slowly, the shift overlaps too long, and the computer's adaptive learning eventually runs out of correction. An overhaul kit replaces those sealing parts plus the pan, case and cover gaskets in one box, so the unit leaves the bench sealed like new instead of half-new.
The U250E has a specific weak spot here. Sonnax notes that sealing ring problems in the rear cover cause a 2-3 upshift flare or bind and can take out the C0 clutch early. If you are in the case for that complaint, the rear cover rings in this kit are the reason you opened it.
A seal kit only fixes a sealing problem, so rule out the other causes first. Sonnax lists bad speed sensors, low battery voltage, poor grounds and clutch clearance errors as sources of U250E shift complaints, and a bad speed sensor alone can cause a 2-3 bind. Check the fluid level hot with a scan tool reading temperature, pull codes, and look in the pan. Fine aluminum in the fluid means a spun case bearing, and that debris will also stick solenoids, so the valve body comes into the picture. Our guide to Aisin harsh or delayed shifts walks through that order of checks, and the Aisin slipping under load guide covers the hot-slip side.
This kit is listed for the Toyota U250E from 2005 on. The U250E itself is the five-speed behind the 2.4L in the 2005-2009 Camry, 2006-2009 Camry Solara, 2009-2014 Matrix, 2009-2010 Corolla XRS and 2009-2010 Pontiac Vibe 2.4L. Many Highlander, RAV4 and V6 Camry models of the same years use the U151E or other units with different internals, so confirm U250E on the case tag before ordering. If you are not sure, send us your year and VIN. You can browse the rest of our Toyota and Aisin parts on the Aisin transmission parts page, and if you want a kit that adds frictions and steels, see the U250E overhaul kit for 2003-2013.
If the C0 drum is scored from a ring failure, add the U250E direct clutch drum with piston, and if the pan held aluminum debris, plan on the U250E valve body for 2004-2014 or at least the U250E solenoid kit.
| Fits | U250E 2005 |
| Part type | Overhaul Kit |
| Condition | New |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is a soft-parts overhaul kit, industry number 26512GSX: the gaskets, lip seals, O-rings and sealing rings needed to reseal the transaxle. It does not include frictions, steels, pistons or a filter.
The 2.4L four-cylinder 2005-2009 Camry, 2006-2009 Camry Solara, 2009-2014 Matrix, 2009-2010 Corolla XRS and 2009-2010 Pontiac Vibe. V6 models and most Highlanders and RAV4s use different transaxles, so confirm U250E on the case tag.
It can, if the cause is worn rear cover sealing rings, which Sonnax links to 2-3 flare and early C0 clutch failure. Rule out speed sensors, battery voltage and grounds first, and replace the C0 frictions if they are burnt.
Usually frictions and steels if the packs are worn, a new filter, and Toyota WS fluid. Replace any bonded piston that has separated and the valve body or solenoids if the pan shows aluminum debris.
Toyota WS (World Standard) ATF only. Check the level with the fluid warm and the temperature confirmed on a scan tool.
Yes. Reset transmission memory with a capable scan tool, then road test with 10-15 upshift and downshift cycles. Some 2-3 overlap and a 3-2 clunk during the first cycles is normal.
