CP_Ree

iTrader: (1)

I've searched and found no specific answers. Maybe those that have broken their trannies due to power can chime in. So.... what actually breaks in our trannys. Is it really due to the stress put on it by the power/torque made at a certain point? Or is it just because of wear and tear? Has anyone taken their broken trannys (due to power) apart? This random # of 400-550 whp is kind of broad as to what our W58s can "handle" for power. I guess what I'm trying to get at is, what breaks when we make too much power with them? Input shafts? output shafts? gears shearing? Forks? Rails? hmm? If we can figure out what the weaknesses are, we can fix them.

JspecSC3

iTrader: (4)

Thats a very good question. I hear they can handle up to 500hp with no problems though. Just be good to them and they will be good to you. Spoil them with some good synthetic gear oil and a nice tranny cooler to cool the juices. But yeah..what breaks in our W58's?

ki_soarer

3rd gear syncro, with 512 WHP and a 12 sec pass!

CP_Ree

iTrader: (1)

So did third just start grinding or did 3rd shear off, or did it break and get stuck in 3rd? I assume if it was just the synchro, it was just grinding/not going into 3rd.

Bean

iTrader: (1)

why try to fix it when you'd end up spending more money doing that than you would swapping over to the R154?

ki_soarer

wouldnt go into 3rd. and he is anti 1JZ and R154 is no good to him . lol. it will hold good power if you dont shift really hard.

got_trd

Why fix it when theres a V160 available You have 188 to the wheels so you have nothing to worry about

Gamer

Only 188 atw would worry me


Sorry, my poor attempt at humor at someone else's expense ... Feel free to fire away at me.

got_trd

Its ok man.. I was humored by it

CP_Ree

iTrader: (1)

Ha. Ha. Ha. Um... It's not like I'm assuming I'm worried that I'm going to break it with this slow pos the way it sits(stock at 188 slow whp). I know nothing about the R154 except that ?it comes with the 1JZ?. I wouldn't know hot to get ahold of one otherwise. Laugh all you want if you don't think I'm not going to make power; I don't just want 250(1jz)-500 like most of you guys on here... that'd be a waste of time to turbo it and still be slower than my last car. Sorry, I don't mean to come off as cocky, but I hate when people try to say that I'm all talk; my last car proved some of those people wrong. Pretty much all I'm looking for is a temporary (year or so) solution that I can use for a year or so with no launching, all dyno, and hwy pulls. I know it'll hold up on the dyno because my friend's did with 690 whp, but when it's putting it to the ground, that's a different story.

Gamer

No problem man, no one was suggesting that you would not do what you say you will.

It was not directed at you personally, just as I said a poor attempt at humor and boredom.

Five1OH

The R154 comes in the mkiii supra turbo (7mgte) and the 5 spd toyota soarer (1jzgte)

IIRC, you can use the MKIII supra tranny in your sc300, but you will need a 1jz bell housing

will an MKIII supra 5spd LSD bolt into an sc300?

got_trd

Im not doubting you. I wasnt sure if you were refering to right now or in the future. Which is why I suggested the v160. Esp if you want to do highway runs. Who said all I wanted was 250-500hp? My goes is mid or high 10s. 500hp isnt going to do that...

But once again, the 1JZ can do ANYTHING the 2JZ can...... period.

qtb33

If you are ok with doing your own wrenching and have acess to a press, cryo-treating is a cheaper option at about $2.50 per #. I have posted a email I recieved when I inquired about it to a company called 300Below.

Here's there website: www.300below.com

If you want a copy of my email PM me and I'll share it. It has been proven to make massive gains in material strength.

Bean

iTrader: (1)

cheaper option, yes... but will it withstand the same kind of power as the R154 or V160? not even close

spend a little cash on something that will break anyways, or spend a little bit more on something that wont

I see R154s in junkyards go for $500 or so with warranties... you do the math... not directed at the thread-starter... but if you're not able to put out $1000 for a quality R154 swap, then you've got bigger problems...