Quick Miata gearset question
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Old [Sch|F]ool
Joined: May 2001
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From: Cleveland, Ohio, USA
Quick Miata gearset question
Is there any problem with the '90-93 gearset where it can't be used in an RX-7?
It seems that when a year range is specified, it's "1994-up" or "1800cc".
I know the 1600s had small rearends and the 1800s had RX-7 sized rears. What about the trans?
It seems that when a year range is specified, it's "1994-up" or "1800cc".
I know the 1600s had small rearends and the 1800s had RX-7 sized rears. What about the trans?
Joined: Mar 2001
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From: https://www2.mazda.com/en/100th/
http://www.solomiata.com/Drivetrain.html
and in '94 with improved seals and a double cone 2nd gear synchro
so i guess that makes the 5 speed, 90-93 and then 1994-now... yes the new miata 5 speed is the same...
and in '94 with improved seals and a double cone 2nd gear synchro
so i guess that makes the 5 speed, 90-93 and then 1994-now... yes the new miata 5 speed is the same...
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Old [Sch|F]ool
Joined: May 2001
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From: Cleveland, Ohio, USA
Well, I'll be finding out soon enough. Picked up an "early style" Miata transmission for a price that I could not pass up. I didn't need to eat lunch this week anyway 
I was a little nervous when I saw that the Mazdatrix FAQ said to use a '94-up trans. Maybe they just wanted to ensure people used "the best"? The Solomata site also says that the '83-earlier trans is junk. I'd rate them as as FC, then '81-earlier (big gears), then late FB. At least, my '80 trans aged very gracefully, and not explosively.
I was a little nervous when I saw that the Mazdatrix FAQ said to use a '94-up trans. Maybe they just wanted to ensure people used "the best"? The Solomata site also says that the '83-earlier trans is junk. I'd rate them as as FC, then '81-earlier (big gears), then late FB. At least, my '80 trans aged very gracefully, and not explosively.
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Old [Sch|F]ool
Joined: May 2001
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From: Cleveland, Ohio, USA
If you have a Turbo II you can use an RX-8 transmission, which has even better ratios. Ignore 1st gear and it's basically a proper competition gearset. The only problem with it besides the lack of speedometer drive is that it uses T2/FD sized flywheel diameter and input/output shafts. Only a problem if you have an N/A engine and vehicle with no simple way of changing that.
From talking to RX8 roadracing teams running "stock" motors(215ish rwhp), the origian Aisin 6-speed sucks. Even after upgrading most of the stock bushings ect with metal parts, they still don't last much more than a 50 minute race. The 09+ trans is MUCH better and lasts much longer before needing rebuilt, but they are harder to find and fetch much more money.
Joined: Mar 2001
Posts: 31,819
Likes: 3,223
From: https://www2.mazda.com/en/100th/
From talking to RX8 roadracing teams running "stock" motors(215ish rwhp), the origian Aisin 6-speed sucks. Even after upgrading most of the stock bushings ect with metal parts, they still don't last much more than a 50 minute race. The 09+ trans is MUCH better and lasts much longer before needing rebuilt, but they are harder to find and fetch much more money.
When I did mine, the guys at Mazdatrix told me a 01' trans was the best one. I don't see any reason why, but that's what they said.
I ended up finding one from an 01' with 11k on it for $375.
I ended up finding one from an 01' with 11k on it for $375.
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