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

 

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.

 

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.

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.

 

^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.