BotieRacing954

it might be a noob ? but can you get a rx8 transmission to fit a s5 turbo 2

flaco

iTrader: (7)

is weak .t2 stronger and cheaper

Evil Aviator

Yes, but it is weaker and more expensive, so there isn't much point.

luckyfd

iTrader: (3)

seen it done and destroyed lol dont bother... if your looking for taller gears go with fd3s 5th gear.... shorterget an 88 t2 tranny

87 t-66

iTrader: (133)

why?

flaco

iTrader: (7)

ATRON3000

Why did Mazda make the rx-8 transmission weaker? sillyness

Flash

iTrader: (2)

Likely to save money. It might be a bit lighter also, but I have no idea.

ATRON3000

to save money they would have used the same old one, but I know they needed to switch to a six speed, dont think that makes it inherently weaker

Flash

iTrader: (2)

You can't be serious. That "same old one" hasn't been made for 18 years! I guess you're not aware of the Miata? They used the exact gears and ratios from the 6-speed NB mx-5 box in the 04-08 RX-8.

It's not easier or cheaper to use a transmission that they don't even make anymore. It's easier to use development from another platform that's actually made in the same decade. They even put the newest generation MX-5 transmission in the 09 RX-8.

RotaryRocket88

iTrader: (7)

The RX-8 has no torque, so using the same transmission as a miata is A-OK.

And no one's mentioned the fact that the shifter will not come up in the correct location on an FC, which means either moving the engine back, or modifying the tail housing.

nitronatefc

iTrader: (2)

I just quoted this same post from the 2nd Gen FAQ at the top of the page a few days ago. Damn newbies need to learn how to search......

https://www.rx7club.com/showpost.php...9&postcount=10

BotieRacing954

so someone said use a fd tranny or just the 5 gear in the s5 turbo 2 tranny

AGreen

iTrader: (11)

No. Don't use an FD or Rx8 transmission. FD's have garbage pull-style clutches. And unless you skipped it, the rx8 transmission going in an FC is in the FAQ section too. It's too short, so it won't work unless you move the engine back, which is not going to happen. Not worth it for a superfluous gear.

luckyfd

iTrader: (3)

what made you think about the se tranny into your fc? ratios?


lol ^ ***

luckyfd

iTrader: (3)

my last tranny i had it rebuilt with the 5th and top end was long and great for highway crusing

BotieRacing954

yea that is what im looking for i want to have a good highway gear so i can have top end but i dont want to lose my off the line eather so tell me how you did it and who did it for you so i know and i can let them know wuts up

WonkoTheSane

iTrader: (2)

"A good highway gear" + Rx8 tranny does not go well together. When I'm cruising at 75, my Rx8 is at around 3800 RPM... I'd prefer if the 6th gear were taller, as it is, I just normally don't use 5th. I'd like a 5th that's exactly what it is now with a 6th gear that drops 75 MPH to around 2200-2500 RPM.

Molotovman

iTrader: (49)

You need to do more SEARCHING! RX-8 Trans is too short and the gear ratios are too short. To get a good highway gear you need to have custom trans work done. No stock mazda gear is going to do it for you. Go find a good local transmission shop. They're going to qoute you over $800 probably around $1000 to change a gear and rebuild it. Besides, if you go to a lower 5th ratio the car will lose *** in 5th gear.
Cheapest and easiest thing is to lower your crusing speed, or deal with it.

Cliff notes:
You Need to Search
RX-8 5 or 6 speed trans WILL NOT WORK
Miata 6 Speed WILL NOT WORK
Miata 5 speed WILL WORK with the input shaft shortened and the RX-7 Bellhousing and tail end on it. But you will have an outrageuosly short 5th and be at about 4.5 grand at 80 MPH.
Custom Gearing costs a lot of money, and YOU DON'T HAVE IT.

good luck

ATRON3000

They stopped making the JDM RX-7 in 2002, The 13B-MSP was first shown on the RX-01, made in 1995, the first full concept RX-8 was at the 2001 Tokyo Auto show, they very well could have used the same transmission in the FD but they chose to go with a weaker 6-speed from the MX-5. They did still make that transmission, they just chose not to use it.

Pele

iTrader: (28)

Additionally, the 5th gear in a 6 speed is 1:1 like 4th in a 5 speed.
Both top gears are the OverDrive (Less than a 1:1 ratio), making it not get the highway gain you want...

The 6 speed has a gear that's somewhere between 1 and 2.

rotarygod

iTrader: (1)

Your RX-8's biggest problem in this area isn't due to the slight gearing difference in top gear in the transmission but rather the rear end gearing. It's absolutely worthless! Depending on your year model, it's either the older 4.44:1 or the newer 4.77:1 as opposed to the FC at 4.10:1.

The shifter location being 4" off is no big deal. When using FC transmissions in an FB, the shifter is back about an inch or so. The solution is to cut and redrill that shaft which isn't hard. The RX-8 shifter is very similar. If the shaft needs to be extended, it's not hard to make a new one. The hard part is getting the shaft out. I'm not saying I'd do this mod but I am pointing out that the 4" difference is not an issue for someone who knows what they are doing and who is determined to make it work. Another overlooked area on the RX-8 transmission is the lack of a speedometer cable. It's electronic on that car. When installing one in an FC, you'd need to install an electronic speedometer too.

Yes it can be done and it can be made to work just fine. However there is some effort involved with it and it's more than just simple swapping a transmission.

j9fd3s

iTrader: (3)

its similar to the miata, but actually just about everything except the case is way beefier in the rx8.

the rx8 is/was available in japan with the 5 speed.

VAbeachFC

so the rx8 clowns destroy it and most ppl who have rx8s are your normal joe and will go to mazda and replace it for a rediculous amount of green,

my tranny blew in oct of 2007 mazda wanted 3200 for a new one, i ended up getting mine rebuilt for 650 bucks at an aamco locally