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Location:
sunshine coast
Registered:
January 2003
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A340E trans ?
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Thu, 21 July 2005 08:59
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hey,
i was just wondering if the A340E auto transmission will work without the use of the ECT ECU, as a manual shifting type box (IE shift lever to change gears). The torque converter clutch can be operated manual via controll module.
the reason i want to do this is i have a 7mgte with wolf ecu in a 4WD hilux and want to use the auto trans.
cheers
steve
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Location:
Adelaide
Registered:
June 2002
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Re: A340E trans ?
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Thu, 21 July 2005 10:33
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Hi mate-yep, the A340 can be used without the ECU, although you do need to supply some power to the two shift control solenoids in the box. Without any power connected, the box shifts 1-3-4 when you shift the stick 1-2-D.
You can either build your own circuit to supply the solenoids with power (relatively simple-and I can go into a bit more detail if you want to go down that road), or you can buy a 'shift box' to do the job from MV autos here in adelaide. (both these options make the box full manual shift)
Cheers
Sean
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Location:
sunshine coast
Registered:
January 2003
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Location:
Adelaide
Registered:
June 2002
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Re: A340E trans ?
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Thu, 21 July 2005 11:29
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Yeah-no worries mate. I'll write out the details about the solenoids in the next couple of days. (very simple-I suspect you'll be able to set it up in an hour or so considering you're an auto sparky)
If you can get hold of a supra or cressida manual though it will be even easier to explain. I'll start jotting it down and try and get it up in the next couple of days.
It can either be done with relays or with transistors-depending on your preference. A transistor set-up will be more compact, but the relays are easier
Take it easy
Sean
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Location:
Montrose, VIC
Registered:
May 2002
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Re: A340E trans ?
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Thu, 21 July 2005 12:34
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I'm actually doing the same thing either later on tonight or sometime tomorrow. I'm using diodes and relays for now, and I'll make something a bit nicer with transistors a bit later on. Can't see the need to pay $200 for it!
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Location:
Montrose, VIC
Registered:
May 2002
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Re: A340E trans ?
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Thu, 21 July 2005 12:38
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I'll go into slight detail too:
There's a plug with 3 wires that goes straight down near the back of the transmission (not the two speed sensor plugs though!) These three wires are for shift A, shift B and TCC (torque converter clutch)
Shift A only: 1st
Shift A+B: 2nd
Shift B only: 3rd
No power: 4th
Applying power to TCC will lock the converter up at any time, and you can't just be indescriminate with it, it locks up enough to stall the engine.
I can't help with wire colours because I don't know them for the exact piece of wire on your box, but it's not hard to work out.
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Location:
Brisbane
Registered:
February 2003
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Re: A340E trans ?
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Thu, 21 July 2005 12:59
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so the A340 doen't need to send a PWM signal to the solenoids - just 12+ or 0V?
handy to know.
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Location:
Montrose, VIC
Registered:
May 2002
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Re: A340E trans ?
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Thu, 21 July 2005 13:02
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Only if it's one of those evil ones with electric line pressure control, and therefore no cable on the throttle (the thing that those that don't think about it call a kickdown cable)
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Location:
Brisbane
Registered:
February 2003
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Re: A340E trans ?
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Thu, 21 July 2005 13:15
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OK then - the A340 that come with my 1ggte had non-electric line-pressure control - not that i still have it but always wondered whether the MV box was worth the cash.
It would be safe to assume MV's work on the valve body is worth the effort?
wild stab in the dark: with manualised control, the cable is still required?
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Location:
Osama's hideout
Registered:
February 2003
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Re: A340E trans ?
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Fri, 22 July 2005 01:38
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MV have built the worlds fastest A340e gearbox, Mike has several gearboxes behind 450rwhp plus cars and they have all been going for some time
mine as completed 40 full track passes, 60 full noise dyno runs, two trips sydney to qld and return 1400 k's, and averaged 400k's per week and no problems. i know of a few guys with C4's behind theirs and they have been through 3 boxes at $2500 a pop in the time ive had mine.
Mike at MV is the man when it comes to these toyota gear boxes.
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Location:
sunny coast, qld
Registered:
October 2002
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Re: A340E trans ?
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Fri, 22 July 2005 03:17
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Just checking something but I assume it would be ok.
I have a 1j auto so I think that is actually a341e or a342e. This transistor system should work the same way for this right?
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Location:
Osama's hideout
Registered:
February 2003
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Re: A340E trans ?
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Fri, 22 July 2005 03:57
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have a look at the drivers side of your box at the back, if you used a jax90 it should be a a340e, i doubt 341 or 342e, otherwise youy wont have a kick back cable you will have a swtich of the ex pedal and if you dont use the switch on ex pedal then your line pressure wont rise and your car will be a dog to drive.
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Location:
sunny coast, qld
Registered:
October 2002
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Re: A340E trans ?
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Fri, 22 July 2005 04:41
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ok good stuff 
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