Got mine here, but holy shit the price is gone through the roof now?


http://www.corksport.com/index.php?s...earch&x=10&y=5

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.

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.

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. :giggle:

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...

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.

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.

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.

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.

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. :laugh:

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.

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. :D

^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

FWD gears not compatible with Miata gears.

Well, except that thanks to Helicopter Ben, they're much more than $400 now.

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.

You could do an 8.8 swap and use 3.73 or 3.55 gears.