View Full Version : 1jz Automatic Tranny
flypinoy457
08-16-2005, 01:08 PM
Well after 2 years of boosting (7psi) I think my stock auto tranny is finally on its last legs. I was planning on going with the boost logic transmission, just not this soon. I did some research on supraforums and dident come up with any for sure answer, but will the 1jz-gte auto matic transmission bolt up to my car? I am odb1, will I need a JDM ecu to control the transmission?
I am currently running the basic dave-h set up with the pt52 turbo, and 2.6mm head gasket, 550cc injectors. I do plan on boosting alittle more if the transmission does fit, but about how much does the 1j tranny tend to hold??
Brown Duckz
08-16-2005, 03:21 PM
Specify your car. I'm guessing an SC300. The tranny will work, no modification needed as far as I know. It is controlled just like your present transmission and will hold 400rwhp safely.
flypinoy457
08-16-2005, 07:20 PM
Specify your car. I'm guessing an SC300. The tranny will work, no modification needed as far as I know. It is controlled just like your present transmission and will hold 400rwhp safely.
Sorry, I am a 94 supra Na-t
Brown Duckz
08-16-2005, 07:30 PM
Sorry, I am a 94 supra Na-tI would say no, there is a difference in wheelbase, maybe someone can chime in on this one.
UrBaN cUsToMs
08-16-2005, 07:32 PM
what you can do is use the r154 mk3 tranny. (stick though) they are stronger than the w58's. i dont know about the autos comparison though.
Brown Duckz
08-16-2005, 07:33 PM
what you can do is use the r154 mk3 tranny. (stick though) they are stronger than the w58's. i dont know about the autos comparison though.I think he may be looking for an automatic tranny replacement for his automatic Supra, I'd say built Boost Logic tranny.
UrBaN cUsToMs
08-16-2005, 07:44 PM
to be honest ive heard all bad about the BL tranny. and this is coming from shops that have gone through tranny's like STC. I would say something like the TH would be better. that is something you want to do right the first time.
i'd vote against the TH seriously at this power level
3 speed and 25% drivetrain loss? no thanks :)
BL is a good transmission from what I've read... it just doesnt hold up on the big hp cars (which this guy is NOT)... I'm talking 1000hp here guys... at that point, yeah its great to upgrade to a Turbohydromatic since you've pretty much got a drag car anyways. One cant expect a tranny originally built for 230hp even when built up to withstand 800-1000hp for very long when not taken well care of...
you need to monitor tranny temps and have a great tranny cooler... which most of the shops that build stuff like this are CLUELESS about.
flypinoy457
08-17-2005, 04:07 AM
Again I was looking to go with the boost logic tranny, along with a slightly bigger turbo (pt61 or pt67) and a higher stall.... etc But this will be further down the line. Right now my tranny is about to die, and my supra is my daily driver. I was honestly thinking about throwing another stock auto in there and again continue to only run 7 psi on lowerd compression and save for boost logic and do it right (my stock auto did last me 2 years of boost before it took a shit)
I was thinking instead of throwing another stock auto in there and having it another time bomb, look into this 1jz tranny and have a safe reliable tranny that will at least hold 400 hp daily driven, and then again save up and go BL tranny, Turbo, stand alone..... etc and do it right. I just want something so that I can drive my supra to work everyday, so anyone else care to chime in on there knowledge on the transmission????
UrBaN cUsToMs
08-17-2005, 01:59 PM
why dont you get a tt auto. i might have one in a few weeks that i wont need. it might be coming with the motor but i need the v160. there so common and easy to get and it will hold the power.
MadMaxx
08-17-2005, 03:01 PM
He would need a TT ECU if he wanted to drive the TT auto. That creates a whole bunch of new problems :)
Jargon
08-17-2005, 03:29 PM
i just got a spare na auto tranny, and im going to send it to a local shop to get built(once i get the car running that is) and will let you guys know how it works out. im hoping to be able to hold 600hp reliably. if im able to do this it might be cheaper than going with bl. as the shop quoted me 1600 to do the work and guarantee it for a year.
Brown Duckz
08-17-2005, 03:33 PM
He would need a TT ECU if he wanted to drive the TT auto. That creates a whole bunch of new problems :)Can you say tuning issues..... :hay:
MadMaxx
08-17-2005, 04:41 PM
Can you say tuning issues..... :hay:
re-wiring, modifying, tuning... yeah, issues :lol:
I read about a stand-alone auto controler a while back on the SF. Like 300$ and you can program the shiftpoints. Would make an interesting test in a NA-T/TT trans hybrid
Jargon
08-17-2005, 04:46 PM
http://latentsolutions.com/ will definately be buying this once i get my built tranny. Sounds very cool.
UrBaN cUsToMs
08-17-2005, 05:39 PM
my friends auto ran funny with the aem. it would shift like 4 times up and down before we even got to 20 mph. he manu shifts the built auto 100% of the time.
maybe he has his aem setup wrong then
i know of plenty of people that run full auto on the TT tranny using the AEM
flypinoy457
08-18-2005, 12:04 AM
Again does anybody have any information on the 1jz auto tranny, the person I am buying it from says it will work the only thing I will need is flex plate and TC from the 1jzgte. I would just like some second opinions on the swap, because I need a transmission ASAP.
Brown Duckz
08-18-2005, 12:07 AM
Again does anybody have any information on the 1jz auto tranny, the person I am buying it from says it will work the only thing I will need is flex plate and TC from the 1jzgte. I would just like some second opinions on the swap, because I need a transmission ASAP.I don't think it will work because of the wheelbase....
flypinoy457
08-18-2005, 12:54 PM
OKay I did some further research and this is what I found....
The only way wheelbase really comes into play is in terms of driveshaft and tailshaft lenghts. With all things being equal, a sc300/soarer driveshaft is shorter than a supra's due to its shorter wheelbase. However, this doesn't mean that the trans won't work. All it really means is that the driveshaft may have to be longer to work in a supra. And one possible solution to this would be taking my tailshaft from my current auto transmission and swaping it over to the 1jzgte transmission, extending it. But does anyone have any clue on splines between the two transmissions??? Can the tail shaft just be transferd over with now modifacation??
Brown Duckz
08-18-2005, 01:37 PM
flypinoy457]OKay I did some further research and this is what I found.... Well then I'm right, it's won't work without modification. Just don't modify to the tune [$] of what a built tranny cost..... I saw a nice used one on SF for about $1200.
OKay I did some further research and this is what I found....
The only way wheelbase really comes into play is in terms of driveshaft and tailshaft lenghts. With all things being equal, a sc300/soarer driveshaft is shorter than a supra's due to its shorter wheelbase. However, this doesn't mean that the trans won't work. All it really means is that the driveshaft may have to be longer to work in a supra. And one possible solution to this would be taking my tailshaft from my current auto transmission and swaping it over to the 1jzgte transmission, extending it. But does anyone have any clue on splines between the two transmissions??? Can the tail shaft just be transferd over with now modifacation??
You mean, by all things being equal, a SUPRA driveshaft is shorter than an SC300/Soarer because of the shorter wheelbase right?
You know you can call Boostlogic or one of the other companies and ASK them if the splines match up and about your tailshaft question.
MadMaxx
08-19-2005, 10:05 AM
Supra is about 5" shorter wheelbase than the SC300.
Has anyone confirmed that the tailshaft lenghts between the SC 1JZ and the supra auto are different?
flypinoy457
08-19-2005, 09:06 PM
Supra is about 5" shorter wheelbase than the SC300.
Has anyone confirmed that the tailshaft lenghts between the SC 1JZ and the supra auto are different?
Going to try to get ahold of boostlogic tomarrow, hopefully they are open on sat. Also going to post in the BL section on supraforums. Basically if the spines match up I can pay pal you next week when I get paid.
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