im going to be the guinniepig for this next event
 

I really wanted a 6 speed and i found a 10k mileage rx8 six speed (which i heard from australia is a pretty decent tranny) for $700 and im probably going to put in december 6 (saturday) with 600hp.


Ill keep you guys posted when & where it will break! which i dont think for a long time...

I've always heard the 8 transmission was weaker than the fd one, but maybe that was the diff... Good luck on your project! Keep us updated!

+8 i loved my 8's tranny but dont think they are reliable... they have a lot of problems when na.. i know 2 of my friends had to get new trannys.. go to the 8 club.. trannys in the 8 have been a long time issue

600 HP? good luck rebuilding the tranny when all that power rips it to shreds.

that's one expensive guinea pig

All I care about are the pictures of the carnage that is impending.

Theres always the Greddy one, anyone try that yet?

there is a huuuuuuuuge differance in cost from the 8 tranny to thr greddy. i've never seen any first hand experience with the greddy.

Yep. My 8 popped 2 trannys. Good luck.

yeah but i found one for $500 with 10k so i think thats a good deal.


One question though. ive heard alot saying that the tranny isnt reliable. SO what is it about the tranny that isnt reliable??? i wanna know so maybe i can get it fixed at a transmision shop.
$5000 difference.

also i was looking at the gears in the rx8 and the only difference is between 4 & 5 in our rx7 5 speed all they did was placed a gear between 4th % 5th if you look in comparison with the rx7 & rx8 tranny's

question. is it possible to swap a 6speed tranny from a supra to a fd?

Good luck, man! Sounds like a very interesting project...

im just trying to find a way to put a decent 6speed into a rx7 without paying $5k. thats all!

yes, the MKIV Getrag will work in the car. You need an adapter though. it will be less than 5K but still pretty damn expensive.

I remember seeing a long time ago an aftermarket 6speed tranny for an FC made by HKS... not sure if they had one for the FD or not...

Good luck on the project!

There's a thread on here somewhere where a guy put a t-56 from a GTO in an fd. Sounded like it worked out pretty well.

If you're gonna put a 6spd into the FD (which i dont know why since our gears are well enough for top speed), do the getrag from the supra.

Those trannys can hold ALOT of power.

Look up saad saad or ryan woon and you will see. I think they are well over 1000rwhp on the factory 6spd.

EDIT: here, i did the quick search for you

http://ca.youtube.com/watch?v=mWDwk7b4Z2g

Do what I am doing. Put a Turbo 350 in her or a G-Force clutchless tranny. Who said you need 6 gears. That will just slow you down with all of that extra shifting.

That makes two of us. I doubt that tranny lasts more than a couple strong pulls.

waste of time/money.

My big question is why do you want a 6spd in the car so bad to begin with?

/\ dunno just my prefrence. i did a top speed run with my car on the 478 and i ran out of gears/rpm at 191mph @ 8400rpm! and the 5th gear takes forever to get up to speed. 3-4 it pulls but in 5th the car really doesnt start to pull until you hit 170. I know im crazy for going that fast but i love high speed.


i have pictures of the Power fc commander but as i told everyone the speedometer said one thing and the power fc said another!

This will end badly....... :icon_no2:

i know but you know what. its my money not yours! but maybe some help will come out of this maybe not!

I was referring to your high speed runs on a public highway, not your trans swap plans.

I have had my baby up to 175 MPH racing a Camaro SS on spray. I know what you mean about the 5th gear thing. When I switched from 4.10s to 4.33s it made a difference. You might want to look into that. Your top speed will go down, but your 5th gear pull will be stronger. What are the ratios on the RX8 6 speed compared to the RX7 5 speed?

/\ yeah i remember that vid. i saved it, the camaro got caught by the police!

HERES ONE OF THE HIGH SPEED RUNS I DID! i have no video cause i was in the car by my self (440hp)

https://img218.imageshack.us/img218/...resizedci4.jpg

as far as i can see it would be a little more speed with the rx8 only with the extra gear gets me there a little faster as i will be in the powerband more often! and with the 3.9 final drive ill run out of gears before i run out of rpms

Dude, get the getrag from the supra.

Its able to hold alot of power and you can go well over 200mph.

Here is another clip, notice how he shifts just before 8k rpm. Since you're squeezing more rpm's in each gear, this tranny is perfect for you.

http://ca.youtube.com/watch?v=mcCRkSPAocc

+1

+1

i already considered that as one of my options. he was asking me about the gearing on the 6speed rx8 gearbox

i would rather do the T-56 from the GTO. Cheaper and a better tranny.

/\ price?

rx8 tranny
 

im waiting to see this rx8 tranny actually functional in the car.Good luck

rx8 tranny
 

im waiting to see this tranny fully functional in the car. Good luck

The T-56's can be had for 1200-2500 dollars depending on if you get one for the LT1, Ls1/2, or a built one.

I can understand about wanting a 6spd. I've gotten use to the one in my C5, and I always find myself hunting for another gear in the FD and S13...

you wont find a getrag for no less than $3k and can skyrocket from there. i've seen several abused trannies that need a rebuild go for $600 tho.

mosey on over to supraforums.com they should be able to give you a good idea on what a decent price for a getrag is.

looks nice, good job maintaining it

It's my understanding that the gears and shafts simply aren't as beefy in the RX-8 trannys. Not something that a shop could do much with.

I suppose I could try to find someone with an RX-8 tranny that needs rebuilt. That should provide some really good information about it.

Dave

A guy here in PR with a 20B swap RX-8 had the main shaft(s?) custom made in cromoly. He said with just that change the transmission holds up to a lot of power.

i think there's a thread in the 8 club.

your Top speed wont increase by going to an FE 6 speed tranny

the reason being.. both tranny's have the same Final Drive

you will be adding a gear somewhere between 3rd and 4th If I remember correctly

which is pretty useless.. since our turbo cars have the tortque to power through it

+1

how do you think people innovate or engineer things, they try it out! maybe by finding the weak points, we can be able to have a 6 speed transmission.

ottoman i was planning on changing the final drive in the rx8 6 speed!

but if this works i can see alot of people having 6 speed fds