A341E Overhaul Kit 1986-2002, new and ready to install. Fits the A341E. Ships fast from the USA.
If your Lexus LS 400, SC 400 or GS 300 now slips on the 3-4 shift, flares when it goes into overdrive on the highway, or takes a second to grab Drive on a cold morning, the A341E four-speed behind the engine has worn through its clutches and seals. This kit is built for the Aisin 30-40 family covering 1986-2002: the A341E, the closely related A340E, and the AW4 used in Jeep. It is a complete teardown kit, not just a gasket set. It holds a Transtar overhaul gasket and seal set, a complete friction clutch set using Borg Warner frictions, every steel clutch plate, and new front and rear seals, under Transtar part number 97006AF.
The A341E is a rear-drive, four-speed electronic automatic. It is a three-speed planetary gearset with a separate overdrive planetary in front, and its ratios run 2.531, 1.531, 1.000 and a 0.705 overdrive. The transmission computer picks gears with shift solenoids, but every gear is actually held by a hydraulically applied clutch pack or brake. When the piston seals and sealing rings harden, apply pressure leaks off. The frictions slip, glaze and shed material, and that debris finds its way into the valve body. This kit replaces both halves of that failure at once: fresh frictions and steels so every pack can hold torque again, and new piston seals, sealing rings, gaskets and lip seals so each pack gets full pressure. Because the steels are included, you are not reusing heat-blued or warped plates against new friction material, which is the most common reason a home rebuild starts slipping again within a few thousand miles.
Rule out the cheap causes first. Check the fluid level hot and in Park, scan for stored transmission codes, and confirm the shift solenoids click and test within spec. An electrical fault can mimic a slip, and the A341E solenoid kit is far cheaper than a teardown. Then drop the pan. A pan full of friction material, a burnt smell and a slip that shows up on a specific shift means the clutches are done and this kit is the right fix. If the shifts are erratic but the fluid is clean, look at the A341E valve body before opening the case.
The kit is listed for 1986-2002 and covers the A341E along with the A340E and AW4 that share the same basic hardware. A341E applications include the SC 400, the 1993-95 GS 300 and the 1995-97 LS 400; the 1990-94 LS 400, SC 300 and Supra use the A340E. A reinforced 30-41LS version also exists, and Toyota changed parts across the run, so count your clutch plates at teardown and compare them to the kit before you start assembly. If you are not sure which unit you have, send us your year and VIN and we will check it. The photo is representative of the kit. Other rebuild parts are on the rebuild kits page.
If you need the bigger master kit for the same transmission instead, see the A341E master rebuild kit.
| Fits | A341E 1986-2002 |
| Part type | Overhaul Kit |
| Condition | New |
| Brand | OEM |
| Reference | A340E |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Yes. It includes a complete friction clutch set plus all the steel clutch plates, along with the overhaul gasket and seal set and the front and rear seals.
The 1995-97 LS 400 uses the A341E, which this kit covers. Count your clutch plates at teardown to confirm they match, or send us your VIN before ordering.
The listing covers the gasket and seal set, frictions, steels and the front and rear seals. Plan on a new filter, and inspect the pump bushing and other bushings at teardown.
Use Toyota Type T-IV ATF. Fill to the cold mark, then check again with the fluid hot and the selector in Park.
The kit is listed for the AW4 as well as the A340E and A341E. Compare the plate count and seal sizes against your unit at teardown before you assemble it.
