aristo and soarer auto

[Whiplash]

just trying to figure out a way to use the aristo auto in a a70 supra and the main problem is the centre axel. prob is that the internal axcels are completely different. i havnt opened it up yet but just wondering if it is possible to use say use an a70 or z30 centre axel into a j147 aristo auto in order to use it with my tailshaft. obviously i will need to swap rear housings also to suit teh supra but the axel is the main problem.

i understand that you cant use any other box withe the 2jz computer but just trying to figure a way around it

cheers

[Mos]

I don't think it's as easy as just swapping the output shaft.

A 1JZ-GTE auto did not have a sufficiently similar output shaft to use in the JZS147 box. The 7M-GE cressida box did though, but some portions of the 7M box had to be used in the combination (eg some planetary gears).

You can't get your tailshaft modified? In the MX83 the shifter wouldn't fit around the donut, but in the IS200 it does (kind of), so my choice these days is to modify the tailshaft rather than stuff around with the box - everyone that I've known to swap the internals has had problems with the box, some terminal, others just nuisance.

Mos.

[mrshin]

This is something I'll be looking into in the next few weeks - mainly because I'm silly enough to try it, for the sake of learning something. If I find anything interesting, I'll tell you all.

[sideshow]

just spend the money and get a custom tailshaft made
ive been thru shit lie this afew times and wired engines up with missmatching auto gboxes and most of the time you just cause headaches

did u not get the matching auto for the 2j if you did then use it and get tailshaft made for the big bung

if you are tryin to use the other auto then you will be doin the wrong thing in my opinion
cause it will never be right

spend abit more on tailshaft if that will curre your problem

otherwise u just create more and mopre probs

[Whiplash]

i do have a aristo auto here for my demise but i do not wish to use the 3 prong shaft setup it has but rather use the yoke insert which all other autos use. reason being the 3 prong shaft isnt all that strong and 2 i need to swap the rear housings either way to accomodate for my speedo. rear housings are a different length so its not so simpley swapping over

either box wether i use 2J or anyother it is going to be a basterd because:

1. 2j ecu only able to run the 2j auto
2. 2j auto needs to have an electric kickdown switch under the accelarator pedal
3. 2j auto rear housing accomodates a electric speedo and is on opposit side to where i need a manual speedo gear and cable to go to it
4. 2j auto has crappy tailshaft setup.
5.going 1j auto needs a separate computer to run it from mv
6. 1j auto needs the throttle body to be moddified for kickdown cable

and if it is way too much work then i will just go manual however i really wanna go auto

anyone know what type the supra autos are like and wether the aristo ecu will run that auto?

[Mos]

I had thoughts, at some stage, of only swapping the extension housing. The spline that the three prong thingi sits on is the same as the slip yoke, so I was hoping that there would be enough spline there to hold onto as long as the bush of the extension housing was holding the slip yoke.

Just curious on one point - do you have any experience that the three prong thingi and donut are not all that strong? Toyota seems to fit them to the heavier and more powerful cars, so I wouldn't have thought there would be much of a strength issue? I'd also expect the compliance to help with risk of breaking things... thoughts?

Mos.

[Whiplash]

well i took both shafts to a tailshaft shop and they said by looking at the shaft that it wasnt as strong as the a70 shaft i brought in with it. the aristo shaft was skinny for one however it may be thicker in material but the main point was that donut part you speak or which he said he wouldnt like to see it being used for track use. i dont really know what sort of background he had on them but he didnt seem to happy with it especially seeing what tailshaft is combined with the car. so because he wasnt happy im not happy with using that type of shaft.

to be honest i actually havnt takingthe 3 prong bit off the gearbox yet. mainly cos im not up to that stage yet but i might give it a go todaqy some time to suss it out a bit more. thanks for that info

[BMWTurbo]

Shaft strength and donut strength are not the same thing, don't get them confused. I've 'heard' of poeple running big HP through the rubber donuts, JZZ30 Soarers and Aristo's have them factory.

I retained the rubber donut and haven't had an issue with it *touch wood*. I looked at fitting the slip yoke from a JZZ30 onto the spline inside the aristo Gearbox, but there was nowhere near enough spline engagement to keep me happy. From memory it was only in the vicinity of 25mm and being a 'slip yoke' this would be crazy to rely on you'd screw the spline fairly quickly.

There is one thing you will have to think about with employing the Donut though, and that's the alignment of the shaft as it leaves the donut. You want this to be as close to a straight line as you can get it, though the donut will allow some give. You will also more then likely find you will need to run a 2-peice tailshaft to do this with no exception.

A single peice 'could' be employed with a uni style slip yoke though. but you 'may' run in to an issue fitting the shaft and have to either lower the box or remove the diff to fit the shaft. This is one thing that often is not though about when gonig 2-peice to single.

[Norbie]

Here's another thought, would it be possible to use a JZA80 auto box? I'm pretty sure it has a conventional slip-yoke arrangement and I would be surprised if the internals were very different to the Aristo box. Auto Supra boxes pop up for sale fairly regularly when the Supra guys do manual conversions. The only question is, will the electronics work the same on Supra and Aristo boxes?

[whatthe?]

which he said he wouldnt like to see it being used for track use.

Auto for track use? Unless it's drag I have to ask.... Why?

[sideshow]

well from my experiences i would rather fuk round with the tailshaft and use the aristo
auto much less headaches

if your speedo is electronic theres easy ways around it

and you still get to use the std ecu to do auto shifting

cause once you go down the 1j auto and start to use say a 7mgte auto ecu just to do the auto yr bringing in more variable so you could take ages to sort it out

anyway do what you want you will find no way is right both ways is expensive

just one way lis ess hassles

[Whiplash]

anyone know what type the supra autos are like and wether the aristo ecu will run that auto?

yeah norbie thats the way i was thinking but i dunno if teh aristo 2j ecu will run it thats the only predicament.

guys as for the donut im only going on what the shop told me. the guy wasnt happy with doing it and neither am i. what jzz30 use a donut tailshaft. the gearbox i have from my jzz30 engine package which i have in my other a70 is a slip yoke type

i would rather the slip yoke anyways as it gets me out of building a shaft either way. i dont like taking my car to shops (do all work myself) and neither do i like making measurements and them making it from that (neither do the shops). either way ive made my decision to go slip yoke just needa make a box work in that way.

also why would you use a 7mgte ecu to run a 1jz auto. i mean i have both in an arms length to work but i dont see any sense in it

[Sciflyer]

All Z30 Soarers use the 3-bolt "Y" + donut at the diff end as per this pic

http://homepage.ntlworld.com/noctilu...a/full~195.htm

I can remember anyone having any problems with them on Soarercentral, and there are some pretty hi-power Soarers around. I think the only thing that happens is after 10-15 years the rubber gets hard and loses its flexibility

[Whiplash]

interesting but im not talking about diff end am i. im talking about the yoke for the gearbox.

[Mos]

Might not be directly related, but at least it suggests the donut can take the punishment.

Mos.