Who has broken a 6 speed? - Page 9 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 12-15-2011, 09:06 PM   #161
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Those t5 trans are sloppy though. That is the biggest reason I havent used one. They shift like crap. Everyone I know has to let the rpms drop quite a bit to shift those boxes.

I may just have to spring for a GSR dogbox. I would like to give the queef gears a chance, but I dont know if they will be here in time. At this point $2500 for a gearset that wont break sounds awesome.

I have also thought about the s2ooo tranny. They are pretty cheap and much stronger than our 6 speed. Thoughts?

Adapter plate and drive shaft, done. Clutch would be easy.
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Old 12-15-2011, 10:09 PM   #162
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Doesn't the s2000 engine turn the opposite direction? Or is that the diff? You might end up with one forward gear and 5 reverse.
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Old 12-15-2011, 10:32 PM   #163
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Quote:
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V8 roadster had no help for our application.
I'm kinda suprised - guess he has other LS stuff on his plate, or dares not regress to mating a TKO to a BP...
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Old 12-16-2011, 04:16 PM   #164
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I believe many of you are looking @ the Quaife gear set as just being "stronger" than the OE 5 and 6 speed. It is but it's also a whole lot more. Less parasitic driveline loss due to the gear tooth pitch, better gear ratios for FI and high strung NA Miata's and arguably better shift feel/engagement than the 6 speed could ever hope to have.
I have been told that the reason FM stopped selling the Quaife gears is that, when put into actual deployment, they didn't turn out to be significantly stronger than the factory gears. I'd be kinda pissed if I paid $3K for a "bulletproof" transmission and then had it fail the same as 5-speeds do...

--Ian
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Old 12-16-2011, 04:23 PM   #165
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I've got a 5 speed, 6 speed and a wc t5 in my garage right now. I'm working on a bell housing/ custom output shaft for the t5 as we speak
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Old 12-17-2011, 01:15 PM   #166
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I'm surprised people aren't looking more into RX7 transmission swaps as much. They used to be pretty popular and were done for a "reasonable" amount of money.
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Old 12-17-2011, 05:13 PM   #167
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Quote:
Originally Posted by codrus View Post
I have been told that the reason FM stopped selling the Quaife gears is that, when put into actual deployment, they didn't turn out to be significantly stronger than the factory gears. I'd be kinda pissed if I paid $3K for a "bulletproof" transmission and then had it fail the same as 5-speeds do...

--Ian
As far as I know, there have only been 3 failures relating to the Quaife gear set. In all 3 instances the gears were not used in an na/nb chassis. It was an nc. Further the case mounts failed which caused the seized gears.

Look at Matt Andrews TA Miata. It's still going strong and he's had it since 2008. I've had mine for about the same time and it's still going strong.
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Old 12-24-2011, 10:11 AM   #168
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I finally got an answer from Quaife and they are producing more gear sets in the end of January. If you order now you will get them 6 weeks later (March). There are currently no sets in the US. That is the good news. The bad news is they are going to run $2400. Although expensive by the time you figure down time and wasted track days when the tranny breaks I guess the best long term option for high horsepower Miata guys.
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Old 12-24-2011, 10:45 AM   #169
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Seems like it would be cheaper to get a custom adapter and a t56 or tko600 or something similar.
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Old 12-24-2011, 01:40 PM   #170
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Sequential dogbox or bust
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Old 12-24-2011, 03:02 PM   #171
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Sequential dogbox or bust
Or this.
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Old 12-24-2011, 03:55 PM   #172
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Quote:
Originally Posted by viperormiata View Post
I'm surprised people aren't looking more into RX7 transmission swaps as much. They used to be pretty popular and were done for a "reasonable" amount of money.
Hello from Chile!, I did a RX TII trans swap (and rear end) and it worked great with my 270 RWHP 1.6, now I am upgrading to 400 RWHP built 1.8, hope it can keep up with that power..
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