UPDATE: A limited supply of the original best-selling Lextreme 1UZFE EGR Delete Kit remains. If you own a 1UZ from 1990-1997, you really need to get this kit! Email me at [email protected] for help with ordering or questions. This will probably be the last kits I have made.

All other parts are SOLD OUT and won't return, including the LS400 and SC400 turbo kit, rebuild kits, supercharger and performace torque converter. We're not an auto parts supplier and I can't respond to inquries for random Lexus and Toyota auto parts.

LEXTREME LEXUS FORUMS HERE! - Post Questions For Quick Answers!

Lexus LS400 & SC400 A341E Transmission

DESCRIPTION

The A341E automatic transmission is a 4–speed Electronically Controlled Transmission with an intelligent control (hereafter called ECT–i) developed exclusively for the Lexus LS400. The A341E automatic transmission has the following features.

_ When shifting the transmission, the engine torque is controlled and the clutch hydraulic pressure in the transmission is electronically controlled to reduce transmission shift shock.

_ A new type of ATF (ATF Type T–II) is used which provides improved shifting characteristics and prevents deterioration in the AFT over time.

HINT: For the A341E automatic transmission, use ATF Type T–II or equivalent.

_ A super flow torque converter is used to improve the transmission efficiency.

The A341E automatic transmission is mainly composed of the torque converter with lock–up clutch, 4–speed planetary gear unit, the hydraulic control system and the electronic control system.

To minimize the possibility of incorrect operation of the automatic transmission, a shift lock mechanism has also been added.

 

 

General Specifications
Type of Transmission A341E
Type of Engine 1UZ–FE
Stall Torque Ratio 1.900 : 1
Lock–Up Mechanism Equipped
1st Gear 2.531
2nd Gear 1.531
3rd Gear 1.000
O/D Gear 0.705
Reverse Gear 1.880
C1 Foward Clutch 6/6
C2 Direct Clutch 4/4
C0 O/D Direct Clutch 2/2
B2 2nd Brake 5/5
B3 1st & Reverse Brake 7/7
B0 O/D Brake 5/4
2nd Coast Brake (B) Band Width mm (in.) 40 (1.57)
F1 No.1 One–Way Clutch 22
F2 No.2 One–Way Clutch 28
F0 O/D One–Way Clutch 24
No. of Sun Gear Teeth 42
No. of Pinion Gear Teeth 19
No. of Ring Gear Teeth 79
No. of Sun Gear Teeth 42
No. of Pinion Gear Teeth 19
No. of Ring Gear Teeth 79
No. of Sun Gear Teeth 33
No. of Pinion Gear Teeth 23
No. of Ring Gear Teeth 79

SC400-A340E

DESCRIPTION

The A340E automatic transmission is a 4–speed Electronically Controlled Transmission with an intelligent control (hereafter called ECT–i) like the A341 E automatic transmission used in the LS400. The A340E automatic transmission has the following features.

• When shifting the transmission, the engine torque is controlled and the clutch hydraulic pressure in the transmission is electronically controlled to reduce transmission shift shock.

• A new type of ATF (ATF Type T–II) is used which provides improved shifting characteristics and prevents deterioration in the ATF over time.

HINT: For the A340E automatic transmission, use ATF Type T–II or equivalent.

• A super flow torque converter is used to improve the transmission efficiency.

The A340E automatic transmission is mainly composed of the torque converter with lock–up clutch, 4–speed planetary gear unit, the hydraulic control system and the electronic control system.

To minimize the possibility of incorrect operation of the automatic transmission, a shift lock mechanism has also been added.

Do you have any questions? If so, please head over to the forums to get a quick answer or share your experience!

Cash App (user: $lextremeparts).
This is a freelance site with no support by huge companies.  I have been doing most of the R&D and technical write-ups by myself with my personal money and literally thousands of hours of my time.  I have taken extra steps to demonstrate in details how things are done.  Currently I am one of the few people doing Lexus V8 research and performance enhancement.  This effort comes from my personal love for this wonderful engine.  Most of the modifications are from trial and error. There's no cookbook for 1UZFE mods and its unknown territory for much of supercharger performance.  The parts, labor, web development and site hosting are 100% paid from my personal hobby money.  If you feel my efforts help you in any form, please do not hesitate to donate any amount of money to support this site. You have no idea how much I and the entire Lexus and Toyota community appreciate it!

9 thoughts on “Lexus LS400 & SC400 A341E Transmission”

  2. Good day,
    First of all, thank you for heloing us.
    I have fitted an 1uz vvti 4spd autobox with standard prewired management system, now that im done it doesn’t shif gear while driving..any ideas of how to find the reason for this?
    Best of wishes
    Henk

    Reply

  3. I have a 1997 Lexus LS 400 that needs a Detent Cable/ Kick down cable/DTS Cable, I hope I am using the correct name for it. I have been on several site and cannot find this part. Can you help find this part? and correct name for it. This part goes to the transmission for helping to change the gears out or something to that effect.

    Reply

    • I have the same issue the part number is 35520-50020. It is a discontinued item so I wish you the best of luck. If you happen to find please let me know where you got it from.

      Reply

  4. Hello,
    I am UK resident, I have a disabled 1997 Lexus LS 400. 2 months without!
    I damaged beyond repair, the transmission oil cooler pipe, Part No 32921-50060.
    I cannot find a replacement, ‘discontinued’ part.
    Can you possibly assist ?

    Reply

  5. Jai un ls 400 1992 ma transmission a commencer a fair des sienne un matin jai parti mon char et jai embrayer le reculon, ensuite le drive et je suis decoller et la 2-3-4 embarquais pu jai arreter de le prendre 2 semaine et il est redevenu corect sa me la refait et il est redevenu correct apres 2 jours..je me demandais si sa pouvais etre juste un sensor ..ou sinon quoi et jai une autre question jaurais aimer changer la transmission pour une manuel et garder mon moteur ..esquil y a une transmission manuel qui fit

    Reply

  6. Good day
    My 4 speed Auto box catching gears when its cold qnd it moves backwards and forward, but as soon as it gets a bit hot then I get nothing, it goes into gear but doesnt want to move.
    Any advise there?
    Kind regards

    Reply

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