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DEX VI fluid in a toyota A340e auto trans #4507524
09/04/17 07:28 PM
09/04/17 07:28 PM
Joined: Dec 2013
Posts: 385
Kuala Lumpur ,Malaysia
alcyon Offline OP
alcyon  Offline OP
Joined: Dec 2013
Posts: 385
Kuala Lumpur ,Malaysia
I just bought a 1989 JDM Toyota Soarer. Its a inline 6cyl engine, RWD car.
It comes with the a340e auto transmission. Has any of you ever owned a car or still owns one that uses this transmission?
If you do, since the manuals call for DEX II or III, have you tried DEX VI in this trans, and will it do any damage ?

Last edited by alcyon; 09/04/17 07:29 PM.

Kyosho Optima Mid SWB, LWB and Lazer ZX
1991 Proton Saga 1.3S SOLD
1989 Toyota Soarer GT Twin Turbo L
Re: DEX VI fluid in a toyota A340e auto trans [Re: alcyon] #4507543
09/04/17 07:44 PM
09/04/17 07:44 PM
Joined: Jul 2004
Posts: 12,027
Middlesex County CT
simple_gifts Offline
simple_gifts  Offline
Joined: Jul 2004
Posts: 12,027
Middlesex County CT
Are you open to other options?

I've used Valvoline Maxlife LV fluid in a a340e (2002 tundra) It seems to do well.

I suspect the original Dexron fluid was significantly sheared down since shifting greatly improved after the fluid swap.


2004 Prius; 97K ML Syn 5W-30
2007 Yaris 71K 0w-40 Castrol
2006 B2300;130K;ALM


Was driving an ox cart; Now on the USS Enterprise
Re: DEX VI fluid in a toyota A340e auto trans [Re: alcyon] #4507545
09/04/17 07:46 PM
09/04/17 07:46 PM
Joined: Apr 2016
Posts: 752
Specific Ocean
Kibitoshin Offline
Kibitoshin  Offline
Joined: Apr 2016
Posts: 752
Specific Ocean
My Toyota Tundra is one of the last trucks to still have the A340 transmission and is currently running Valvoline Dexron VI full syn with no issues.


Shin Gekiretsu Shin'ou'hou
01 Toyota Tundra 2WD V8 4.7L - 170k mi
02 Chevy Silverado C1500 V8 5.3L 154k mi
Re: DEX VI fluid in a toyota A340e auto trans [Re: simple_gifts] #4507549
09/04/17 07:48 PM
09/04/17 07:48 PM
Joined: Dec 2013
Posts: 385
Kuala Lumpur ,Malaysia
alcyon Offline OP
alcyon  Offline OP
Joined: Dec 2013
Posts: 385
Kuala Lumpur ,Malaysia
Originally Posted By: simple_gifts
Are you open to other options?

I've used Valvoline Maxlife LV fluid in a a340e (2002 tundra) It seems to do well.

I suspect the original Dexron fluid was significantly sheared down since shifting greatly improved after the fluid swap.


oh yes, I am not familiar with Auto trans fluid, as I have only owned a M/T car for the last 20 years. Its all new to me. Thanks for the tip.


Kyosho Optima Mid SWB, LWB and Lazer ZX
1991 Proton Saga 1.3S SOLD
1989 Toyota Soarer GT Twin Turbo L
Re: DEX VI fluid in a toyota A340e auto trans [Re: alcyon] #4507550
09/04/17 07:49 PM
09/04/17 07:49 PM
Joined: Sep 2014
Posts: 1,416
Seattle-ish, WA
Oro_O Offline
Oro_O  Offline
Joined: Sep 2014
Posts: 1,416
Seattle-ish, WA
You can run Dex VI with out undue harm. But I feel they run better with DexIII.

The Dex VI is thinner, and more highly friction-modified than earlier transmissions were designed to work with. I have run Dex VI and Maxlife in that generation of transmissions, but have switched back to using a DexIII type thickness fluid and get better results. I don't know what products you have access to in your market, but in these transmissions I really am now like the Castrol Transmax High Mileage for DexII, DexIII, and Toyota IV applications.

Re: DEX VI fluid in a toyota A340e auto trans [Re: alcyon] #4507560
09/04/17 08:02 PM
09/04/17 08:02 PM
Joined: Apr 2008
Posts: 12,859
Onondaga County
Miller88 Offline
Miller88  Offline
Joined: Apr 2008
Posts: 12,859
Onondaga County
I run Dex VI in my Jeep version of that transmission. Definitely the best shift quality I've had out of running various fluids in it.


18 Forester 2.5I 6M
00 Jeep Cherokee
01 Ford F-350 XL 4x4 5M
Re: DEX VI fluid in a toyota A340e auto trans [Re: alcyon] #4507787
09/05/17 06:30 AM
09/05/17 06:30 AM
Joined: Oct 2014
Posts: 1,219
NoVA
Jimzz Offline
Jimzz  Offline
Joined: Oct 2014
Posts: 1,219
NoVA
Yep Maxlife or Dex VI will both be fine. Which ever is easier to find/or you have run it.


yup

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