A341E Overhaul Kit, new and ready to install. Fits the A341E. Ships fast from the USA.
The A341E is the four-speed automatic behind many 1990s Lexus V8 and inline-six cars, and by now most of them have well over 150,000 miles on the original clutches and seals. If your SC 400, GS 300 or LS 400 flares between third and fourth, hesitates before it grabs Drive in the morning, or keeps a drip under the bell housing no matter how many times the pan gasket is changed, this kit holds the parts for a complete overhaul. Despite the name, it is more than a seal set. Listed as kit components B073820CS, B073880B and W073881B, it pairs a full overhaul gasket and seal kit with a friction plate set and a steel plate set for the Aisin code 30-41LE.
Inside the A341E a three-speed planetary set works with a separate overdrive unit up front, giving ratios of 2.531, 1.531, 1.000 and a 0.705 overdrive. The computer chooses the gear through its shift solenoids, but every ratio is actually held by a hydraulically applied clutch or brake pack. Two things wear together over the years. The friction facings glaze and thin, and the piston seals and sealing rings harden so less apply pressure reaches each pack. A slipping pack makes heat, the heat hardens more rubber, and the cycle speeds up.
This kit lets you break that cycle in one teardown. The product photo shows the two valve body separator plate gaskets, the cork pan gasket, case and housing gaskets, front and rear lip seals, a full set of O-rings and sealing rings, plastic thrust washers, and stacks of frictions and steels for each pack. Because the steels are included, you are not pairing fresh friction material with warped or heat-blued plates.
Rule out the electrical side first. A stuck shift solenoid can mimic a slipping clutch, and many of these cars predate OBD-II diagnostics, so meter the solenoids rather than waiting for a code. Our guide to Aisin slipping under load covers that check, and shift flare vs slip explains how to tell a pressure problem from a worn pack on a road test. If the solenoids test good and the pan shows friction material, the unit needs this overhaul.
This kit is for the A341E, Toyota code 30-41LE. In North America that unit was used in the Lexus SC 400 (1992-1997), GS 300 (1993-1995) and LS 400 (1995-1997), and it also appeared in many home-market Toyota models. Some broad catalog lists also name the Supra, SC 300, early LS 400 and LX 470. Those vehicles came with the A340E or the A343F, which are different units, so check before you order. Read the transmission ID tag on the case and compare it with your old plates. If you are not sure, send us the year and VIN and we will confirm. A heavy-duty 30-41LS version exists too, so confirm the code first. See our Aisin transmission parts for related components.
| Fits | A341E |
| 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.
Yes. It combines the overhaul gasket and seal kit with a friction plate set and a steel plate set, listed as components B073820CS, B073880B and W073881B.
Those cars use the A340E, not the A341E, so this kit is not the right match. It is for the A341E (30-41LE) in the SC 400, the 1993-1995 GS 300 and the 1995-1997 LS 400. Check the ID tag or send us your VIN.
Inspect the oil pump bushing and gears, the shift and lockup solenoids, and the cooler lines. A worn pump bushing or a dirty cooler can undo a fresh rebuild.
Toyota Type T-IV ATF or an equivalent fluid licensed for T-IV. Total capacity is about 8 liters, while a pan drain only replaces about 3.
At high mileage the torque converter lockup clutch wears and its debris collects in the valve body, which causes jerky shifts. Vibration that follows can wear the pump bushing and start leaks.
