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Old 08-08-2011, 02:25 PM   #21
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Are you guys getting these gears out of old 626's or through another source? I've really been wanting to go to a longer gear but I'm a little nervous about going through all that work just to drop in a 30 year old ring and pinion built for a 100hp family sedan. I'd love some confirmation on how they are holding up.
Got mine here, but holy **** the price is gone through the roof now?


http://www.corksport.com/index.php?s...earch&x=10&y=5
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Old 08-08-2011, 02:36 PM   #22
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Originally Posted by pdexta View Post
Are you guys getting these gears out of old 626's or through another source? I've really been wanting to go to a longer gear but I'm a little nervous about going through all that work just to drop in a 30 year old ring and pinion built for a 100hp family sedan. I'd love some confirmation on how they are holding up.
If it's an 88-92 626/MX6 Turbo (H-type trans), don't worry about the strength. It's way stronger than anything that ever came factory in a Miata.
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Old 08-08-2011, 02:37 PM   #23
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Jeez, looking at the ratios, the 3.63/6-speed looks like a great option even for a stock-ish NA. I may have to further investigate this after Hallett... but right now I need to go buy tires.
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Old 08-08-2011, 02:55 PM   #24
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All i know is that 238wtq on a 6spd/4.10 combo is friggin' stupid.
You raised the 6500 redline at least right? lol.
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Old 08-08-2011, 03:04 PM   #25
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You raised the 6500 redline at least right? lol.
Yeah, it's at 7200 i think (hard to tell without datalogging because the factory tach is so innaccurate). But it's still dumb. A car with torque doesn't need gearing like this. It'd be way faster with a longer 5 speed.

I don't need to feel like an F1 driver in traffic accelerating up to 40mph to cruise in 5th or 6th gear. (Don't get me wrong, i LIKE shifting, but it's not really the point.) It's geared like an S2000 with a 2000rpm lower redline, and twice the useable torque. DUMB.
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Old 08-08-2011, 05:42 PM   #26
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Jeez, looking at the ratios, the 3.63/6-speed looks like a great option even for a stock-ish NA. I may have to further investigate this after Hallett... but right now I need to go buy tires.
a 6/4.10 in your car would scream...but suck on the highway.
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Old 08-08-2011, 05:55 PM   #27
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a 6/4.10 in your car would scream...but suck on the highway.
Given that I'm prone to long road trips in the car, a decent highway gear would be good to have. Plus, one of these days I still plan to bolt a blower to it...
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Old 08-08-2011, 06:09 PM   #28
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Originally Posted by sixace View Post
Got mine here, but holy **** the price is gone through the roof now?


http://www.corksport.com/index.php?s...earch&x=10&y=5
Just checked mazdaspeed site - looks like the price of the R&P has gone up about 40% since I picked mine up...

I blame Obama.
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Old 08-09-2011, 01:31 AM   #29
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Well the deed is done. I now have a 6 speed with my 3.9.
Now, how to find a 626 rear end...

One nice side effect. My new 2nd gear is the perfect urban dorifto gear.
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Old 08-09-2011, 02:02 AM   #30
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a 6/4.10 in your car would scream...but suck on the highway.
It would be very comparable to my current 5sp/4.1 with 13's. Great on the track but in 5th on the freeway I am over 4k at 75MPH.
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Old 08-09-2011, 08:50 AM   #31
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Originally Posted by JasonC SBB View Post
Well the deed is done. I now have a 6 speed with my 3.9.
Now, how to find a 626 rear end...

One nice side effect. My new 2nd gear is the perfect urban dorifto gear.
You might already know this... but the 86 626 was what was mentioned earlier. You'll need an older car than that if you're looking for a rear end. 86 is still GC chassis.
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Old 08-09-2011, 04:17 PM   #32
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Oh right, stupid question time: Do certain FWD 626's have the 3.6 gears I want?
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Old 08-09-2011, 04:48 PM   #33
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Oh right, stupid question time: Do certain FWD 626's have the 3.6 gears I want?
Gotta admit i'm not aware of a 626 off the top of my head with a 3.6 final drive.

Nor am i sure if they'll work with the Miata, but that's your job. I'm still a Miata noob.

Let me look around, i have the spec readouts somewhere for the 88-92 626 at least, and the next generation's specs are everywhere on the internet. I'll have something for you by tomorrow afternoon if nobody else answers before then. (Are you sure you didn't get confused when you saw the 3.63? That's from an aussie SE)


I have a 4.39 final drive from an MX3 sitting at my garage, but that's not helping anything lol.
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Old 08-09-2011, 05:06 PM   #34
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You've got to find a first gen 626 with a manual trans and then you need to get under it and roll rear tire while you count the drive shaft turns. After taking the time to do this one day I realized it was far cheaper for me to spend $400 and buy a new 3.6 r&p.
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Old 08-09-2011, 05:17 PM   #35
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^Ok, that makes more sense.

In that case, good luck finding a 1st gen 626. I don't think i've EVER seen one in person. :P
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Old 08-09-2011, 05:21 PM   #36
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Oh right, stupid question time: Do certain FWD 626's have the 3.6 gears I want?
FWD gears not compatible with Miata gears.
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Old 08-09-2011, 07:31 PM   #37
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Originally Posted by m2cupcar View Post
You've got to find a first gen 626 with a manual trans and then you need to get under it and roll rear tire while you count the drive shaft turns. After taking the time to do this one day I realized it was far cheaper for me to spend $400 and buy a new 3.6 r&p.
Well, except that thanks to Helicopter Ben, they're much more than $400 now.
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Old 08-09-2011, 07:52 PM   #38
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What about gears from a RX-7?
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Old 08-09-2011, 08:01 PM   #39
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Quote:
Originally Posted by Gearhead_318 View Post
What about gears from a RX-7?
Pinion is different.

You need a pre-83 RWD 626 R&P, as per Joe Perez:

https://www.miataturbo.net/suspension-brakes-drivetrain-49/scored-cheap-3-636-r-p-39012/

or you can buy one brand new from Mazda for $500.
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Old 08-09-2011, 08:25 PM   #40
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You could do an 8.8 swap and use 3.73 or 3.55 gears.
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