Another eBay 6spd $500
#21
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6 spd cars came with a 3.9 ratio rear, some crazy overseas models were 3.636. Your 92 has a 4.3 ratio rear. (then 4.1 in the 1.8 NA, and back to 4.3 for the 5 spd NB) You'd want to source a numerically lower gear if you got a 6 speed. It's really not that hard, you can find what you need out of a number of mazda trucks and rx7s. Someone has a cool list of other mazda gears compatible with the 7" miata diff, maybe they'll post it up.
#22
I would have thought the opposite is true. My Miata sits at about 4k rpms at 80mph, twice now I've gone searching for that 6th gear only to remember there wasn't one and it has to go back to fifth. But I guess the 6-speeds could be geared in such a way that 6th isn't much higher than the 5th we have now. Is this true?
#26
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here's your 3.9. That's about half the price of a new 3.63 from mazdaspeed. I'd still spend double for the 3.6 though. It may slow the accleration, but not enough to notice (only on the timeslip) and the lowered cruise rpm would be worth it IMO.
#27
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better yet, call 915racing.com in TX and I bet you can source a 84-85 GSL 3.909 cheaper.
or try the:
3.700 - 808/72-75 RX-3
3.636 - RWD 626
3.727 - 76+ RX-3
3.308 - 82-84 B2000/Courier Diesel
here these guys: http://cgi.ebay.com/ebaymotors/Mazda...2328QQtcZphoto
just call them, they can get the 3.909
or try the:
3.700 - 808/72-75 RX-3
3.636 - RWD 626
3.727 - 76+ RX-3
3.308 - 82-84 B2000/Courier Diesel
here these guys: http://cgi.ebay.com/ebaymotors/Mazda...2328QQtcZphoto
just call them, they can get the 3.909
#29
6 Speed Trans
I have a low milaage 6 speed w/ 47200 miles available for $695. Located in Alabama. See www.partsgroup.com.
Tom
Tom
#30
I'm currently running a 5-speed and 3.636 gears in my 2000. I really like that gearset. If you do the math on the custom FM gears, my first gear w/ the stock 5 speed is very close to their tall 1st gear w/ stock 4.30's. All that to say I like my setup. Now if I can just fix the speedo.....
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Miata parts for sale/trade
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09-30-2018 01:09 PM