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Location:
sunny coast, qld
Registered:
October 2002
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possible 1jz auto problems?
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Mon, 01 September 2003 00:36
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i took my car for a little drive last night and it seemed like it just wanted to stay in lower gears. I only had it in Drive though. Is this normal? In my 1g soarer, it wants to change up as soon as it can? It felt good when it did change though, no clunkiness or anything. anyone know anything about this? The engine has been sitting around for quite a while. Could do with a service maybe?
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Location:
Gold Coast
Registered:
May 2002
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Re: possible 1jz auto problems?
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Mon, 01 September 2003 03:47
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Change the oil, also put on a trans cooler, they are cheap and can get them from Autobarn for about $120. I'm using one for my power steering. The A340E Doesn't like heat. I destroyed one at the strip LONG ago in my old setup. Symtoms of a stuffed auto are hitting rev cut in 1st gear taking off, it not shifting until you back off alittle and/or then it does change it bangs into the next gear and chirps. But that soon goes away and the next gear starts slipping too.
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Location:
sunny coast, qld
Registered:
October 2002
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Re: possible 1jz auto problems?
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Mon, 01 September 2003 03:50
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i already have an oil cooler up front for it and it was just around the block. it didn't want to change until high revs but it was smooth when it did. i will change the oil and see how it goes.
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Location:
newcastle
Registered:
June 2002
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Re: possible 1jz auto problems?
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Mon, 01 September 2003 06:12
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make sure you use Toyota trans fliud .its specific for that gearbox . when i changed to the toyota fluid trans temps dropped about 30% even with a huge cooler .changes are sooner and more solid . i also used a peformance additive (bitron) .not sure if it made any difference but for $11 i thought why not
dextron 2 or 3 is not compatable with the 1j auto despite the dipstick stamp .
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Location:
sunny coast, qld
Registered:
October 2002
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Re: possible 1jz auto problems?
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Mon, 01 September 2003 06:14
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so where do you get TOYOTA gearbox oil from? I just had regular dexron 3 in my gz20 soarer.
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Location:
Brisbane
Registered:
May 2002
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Re: possible 1jz auto problems?
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Mon, 01 September 2003 06:16
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From a TOYOTA dealer? 
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Location:
sunny coast, qld
Registered:
October 2002
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Re: possible 1jz auto problems?
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Mon, 01 September 2003 06:22
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wow, i have never been to one of them!
so i will walk in and say "i would like some auto fluid for my 82 corona with an imported 1jz engine and an A340E gearbox"
they know of this gearbox, or it doesn't matter. Just as long as it is either 2 or 3?
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Location:
Perth
Registered:
October 2002
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Re: possible 1jz auto problems?
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Mon, 01 September 2003 06:36
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Over on the Soarer board, there's a few folks raving about Redline fluid in these boxes. Another option, anyways ..
- Justin
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Location:
newcastle
Registered:
June 2002
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Location:
Wollongong
Registered:
May 2002
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Re: possible 1jz auto problems?
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Mon, 01 September 2003 07:38
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The A340E from the 1JZ is slightly different from the 1UZ auto for some reason. Dexron II or above is suitable for the 1JZ version (I've been running DexIII for over 2 years without any problems). The V8 Soarer 1UZ-FE gearbox requires Toyota Type T-IV fluid... only available at Toyota dealers.
The Redline MTL fluid is for the R154 manual transmissions only, not autos.
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Location:
UK
Registered:
May 2002
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Re: possible 1jz auto problems?
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Mon, 01 September 2003 11:21
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1JZ autobox numbers and spec get very confusing once you start looking into them.
Which car did your 1JZ engine come off? If its a soarer then yes it uses the A340E (which is more closesly related to the mkiv supra autobox than anything else).. but if it was off a 1JZ JZA70 supra it uses the A342E, which is a completely mad one off gearbox only ever used in the supra 1JZ.. it has NO information available whatsoever for it anywhere on earth. The A342E gearbox is more closely releated to the A341E box used on the v8 soarer than the A340E boxes used in 7M mk3 supras or 2JZ mk4 supras... crazy.
The whole thing gets very confusing, i spent a year in total trying to find info on the A342E with no success. As far as im aware the A342E (may be your box if it came off a supra) uses Toyota Type T-IV (new version of T-II), yet no one knows for sure (even jap sites have no info). The only way to be safe with this box is to fill with T-IV as this is also compatible with dexII boxes.
Of course if youve got a soarer engine and box then no problem.. fill with T-IV anyway.
If anyone has a definitive guide on the A342E i'd be a happy man.
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Registered:
March 2003
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Re: possible 1jz auto problems?
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Tue, 02 September 2003 13:42
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| celicamad wrote on Mon, 01 September 2003 16:12 |
dextron 2 or 3 is not compatable with the 1j auto despite the dipstick stamp .
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arrg.. so thats where my recent problems have been comming from.
What type do you recommend for a jzx81 chaser auto box?
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Location:
Adelaide
Registered:
June 2002
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Zinc content
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Tue, 02 September 2003 23:09
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I was told something you guys may find interesting. When I was speaking to Mike at MV autos recently, I quizzed him about the Toyota/Dextron fluid differences. Apparently the main difference is the zinc content of the 2 fluids. Zinc increases the coefficient of friction between the steels and friction materials in the box (I'm sure of the exact chemical/mechanical mechanism yet). The Toyota fluid has a higher Zinc content than the Dextron, hence explaining the shuddering (slipping) that some users of Dextron fluid may experience (occurrence of slippage also depends on the condition of the clutchpacks). I suspect that there may also be some differences in the way the viscosities of the two fluids change with temperature-but I haven't been bothered to find out as yet.
I was advised to use the Dextron in my new street/strip A340. However, considering it is full manual, shift points and shift quality have now become irrelevant. (Dextron is cheaper…)
Sean
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Location:
Perth
Registered:
October 2002
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Re: possible 1jz auto problems?
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Wed, 03 September 2003 07:51
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The Soarer board I was referring to is: http://www.alsc.aus.as/
Also, I just priced a Davies, Craig tranny cooler from the local Auto1: only $170 with all nescesery fittings. From some reason, I had expected tranny coolers to be closer in price to engine oil coolers - a nice surprise
Is this unit any good? Can anyone recommend it or something else?
cheers,
Justin
JZA61
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Location:
Canberra
Registered:
May 2002
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Re: possible 1jz auto problems?
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Wed, 03 September 2003 10:26
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Toyota Type IV, is almost he same price as Dextron. For a measly $5.00 per complete fluid change, why would you bother using Dextron.
regards Chuck.
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Location:
sunny coast, qld
Registered:
October 2002
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Re: possible 1jz auto problems?
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Wed, 03 September 2003 11:25
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my engine is from a jzx90 chaser. So is this the same as the soarer with the A340E? or is it something totally different?
thanks
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Location:
ACT
Registered:
July 2002
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Re: possible 1jz auto problems?
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Thu, 04 September 2003 06:48
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Hedge,
The A342E is the same as the A341E found behind the LS400 (the Soarers use the A340E). The only difference between the A342E and the A341E is the ratio of 4th (or OD) gear. Can't remember what the difference is from the top of my head.
If in doubt use Toyota Type4 fluid.
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Location:
UK
Registered:
May 2002
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Re: possible 1jz auto problems?
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Thu, 04 September 2003 11:01
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Thats the story yes, but who can back this up for certain? No-one..
I have yet to find any info that solidly backs up that the A342E is an A341E with a ratio change. For a start the A342E *supposedly* takes dexII as opposed to t-II (although t-Iv is the one to put in).
Also, i know its only electronics but the A342E has both power and manu shift patterns.
I'd like to believe that its an A341E as you say.. but i cant find any info ..either from Toyota, borg Warner, tranny specialists which backs this up... and believe me ive tried. I've emailed Toyota (UK and Japan), Borg Warner, the US main gearbox parts supplier and no-one will say anything about it. Why use a soarer box to base the 1JZ supra on instead of using an amended supra box , or a hybrid between the two A340 supra boxes? Also, howcome the A342E was in production before the A341E? It doesnt make sense (unless of course the last figure refers to a ratio).
If youve got official spec on the A342E i'd be interested to see it.  A spec sheet, a repair manual, a diagnosis list.. anything.
[Updated on: Thu, 04 September 2003 11:10]
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Location:
ACT
Registered:
July 2002
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Re: possible 1jz auto problems?
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Thu, 04 September 2003 22:38
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Read any Toyota tech notes on the A341E and they will state that the A342E is identical except for the OD ratio change.
Not that this really means much. I have seen 5 different versions of the A340E and 2 different models of the A341E so god only knows how toyota does their modeling numbers. I guess its one of those things that nobody is meant to know. I think the best place to find info on the A342E would be in South africa (not sure if this is right but its around there somewhere) where the LS400 was sold with the A342E.
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Location:
UK
Registered:
May 2002
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Re: possible 1jz auto problems?
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Thu, 04 September 2003 23:08
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Cheers Kdog..
I gave up looking for info about six months ago.. ive seen one reference on the net for the A342E, and yes it said it was based on an A341E.. but it wasnt an official site .. just a write up somewhere.
Even the japs havent got much on it (in fact a write up i did on my own site about the A342 ATF fluid even ended up on several jap sites, and most of it was guesswork.. so if theyre using my crappy info for their sites then they obviously dont know much about it either).
Cheers anyway..
adi
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Location:
Sunshine Coast
Registered:
July 2003
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Re: possible 1jz auto problems?
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Sun, 07 September 2003 05:39
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Bassaholic55 - To try and answer your question, try loosening off your kickdown cable, that is what has the most direct control over light throttle change points.
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