1JZ Auto Trans - Highest Power?

[Team DX]

Whats the highest the 1j auto has been known to handle? I want to do the 1.5JZ motor, using the 1j auto, so im wondering on stock twins and 14psi using all stock components, will the auto hold up? I do not want to build the auto whatsoever. Thanks.

[Brown Duckz]

Whats the highest the 1j auto has been known to handle? I want to do the 1.5JZ motor, using the 1j auto, so im wondering on stock twins and 14psi using all stock components, will the auto hold up? I do not want to build the auto whatsoever. Thanks.It should hold 400rwhp.. I don't know if the stock twins can even make that.

[Team DX]

It should hold 400rwhp.. I don't know if the stock twins can even make that.

Thanks for the info, however, is there anyone out there running that kind of power vs assuming its a certain # it will hold? Id like to see proof that it will hold for that setup, since i want to avoid whatever it takes to build the tranny. Thanks.

[Brown Duckz]

Thanks for the info, however, is there anyone out there running that kind of power vs assuming its a certain # it will hold? Id like to see proof that it will hold for that setup, since i want to avoid whatever it takes to build the tranny. Thanks.Well as far as I know the 1JZ transmission shares the same internals as the 2JZ tranny, and it holds 400hp, no doubt, they are countless people who can vouch for that.

[Team DX]

Well as far as I know the 1JZ transmission shares the same internals as the 2JZ tranny, and it holds 400hp, no doubt, they are countless people who can vouch for that.

Sounds awesome, but i digress, is there any proof to the assumption that the internals are the same? If they are, thats a HUGE load off of my shoulders and will progress my swap that much quicker. Thanks for the info and i hope to see some evidence regarding that info, it will make all the difference =)

[got_trd]

My car made 332ft. lbs/torque last year before any of the modding really began and the tranny hasnt failed yet. I would figure hp was right around there also, but due to my bad plugs my hp was much lower.

Considering the fact that the 1jz automatic tranny is powered by a i6 twin turbo engine, I would hope it is capable of the low 400hp range as with the 2jz. Its all pretty much the same.

If you dont want a built auto, just start w/ a manual. Simple as that.

[Team DX]

My car made 332ft. lbs/torque last year before any of the modding really began and the tranny hasnt failed yet. I would figure hp was right around there also, but due to my bad plugs my hp was much lower.

Considering the fact that the 1jz automatic tranny is powered by a i6 twin turbo engine, I would hope it is capable of the low 400hp range as with the 2jz. Its all pretty much the same.

If you dont want a built auto, just start w/ a manual. Simple as that.


Good advice. Problem is, i want an auto. Another problem is, i dont want a stick. W58 sucks as much as any other tranny out there, and the r154 is too much effort. If you did 332tq at the wheels, thats great news and i have much more happiness torwards the swap. BTW, how long have you driven it at that power level with no issues?

[MadMaxx]

1JZ is internally very simmilar to the lexus V8 auto trannies. They can old around 450rwhp w/ a cooler before they reach their limits. So, I'd say around the same amount for the 1JZ trans. Many 1JZ'ers overseas hit 400+hp on their cars using the stock auto.

James

[Brown Duckz]

1JZ is internally very simmilar to the lexus V8 auto trannies. They can old around 450rwhp w/ a cooler before they reach their limits. So, I'd say around the same amount for the 1JZ trans. Many 1JZ'ers overseas hit 400+hp on their cars using the stock auto.

JamesJames you should sell about a dozen of those 1JZ automatics you own... clean out some of that garage space! :bowrofl:

[got_trd]

I've been right around the same power level for like a year and a half now... added a b&m trans cooler almost a year ago just for assurance. I was going to wait on a fmic, ypipe and downpipe before i go to get it tuned, but I think ill just go get it tuned here in the near future anyways. Gas prices are getting ridiculous so I wanna get as much mpg as I can right now