Axle nut!!
 

Does the axle nut for the 1.6 work on the 1.8 axle? Just got my diff swap and it didnt come with the nuts.

Why not try to see if it fits. 10 minutes tops.

I want to say no?

MazdaSpeed site shows same PN for the nuts. So go for it!

Try it. Later 1.8 Axles went to a larger thread.

Ah, that would be why I felt no. I had later 1.8 1piece axles.

They are nuts?
Just buy new ones along with new axle seals FROM MAZDA.

Trust me on this one.

Thanks for the info im going to pick 2 up tomorrow.

The parts catalog says it changed midway through '94, at VIN -4126. Old P/N NA02-33-042B, new P/N D06Y-33-042.

However, the axles didn't change until '95 at VIN -5201. So I'd expect them to be interchangeable, at least until '99. (They changed again then, but I don't know if it was interchangeable.)

+1 to that, the early 1.8 axle nuts were the same but they changed in 96 I believe. I had trouble finding the later 1.8 axle nuts locally, the mazda dealer didn't carry them. I ended up getting them from a Honda dealer, the 4x100 civic's have the same axle nut.

Good nes the nuts fit 90-97 six shooter just sent me the info take a look.

http://www.finishlineperformance.com...3&cat=0&page=1

I've been wrong before, but I'd be willing to bet a kidney that this is incorrect.

I'd be willing to bet you the monetary value of a kidney. Shall we say, $90,000?

Maybe some of the factory documentation is vague or incomplete or incorrect?

I doubt my kidney is worth that, lol. The axle nuts I swapped on my '90 were different, I was told it was off a '97 but I guess it's possible that it was a '99+.

BTW are the axle nut torque specs the same over the years?

shouldnt be to far off the size differnce isnt huge.

No. If I remember right the '98+ is a different part. Slightly larger. I did a '99 swap 4 months ago and my 1.6 ones wouldn't fit. IIRC the guy at the dealer said the part number changed in '98.

Per the Spec Miata folks:
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"How about a short history of Miata half shafts as I know it? I've not mentioned ABS and non-ABS axles as any car without ABS should be able to use either. If you are using ABS (not-Spec Miata) you obviously need the axles with the aluminum ABS ring on the outboard CV housing.

90-93 have two part halfshafts. The stub axles come in two varieties and there is only one type of axle. One stub axle type is for the VLSD and the stubs are different lengths. The other stubs are for the open diff and are the same length. The different stubs (and therefore the diff) can be identified by the shape of the ears on the stubaxle.

94-mid 95 use two part halfshafts. AFAIK, there is only one type of stub axle and one type of axle.

late 95-97 use one part halfshafts.

All 94-97 halfshafts can interchange as a complete assembly. The two part stub axle plus axle can be substituted for the one piece axle.

99 and up non-MSM all use a one piece axle that is 5mm longer than the 94-97 assemblies. The extra length is to make up for the 99- upright and hub assembly that adds 5mm of track per side. Flyin Miata claims that the 94-97 and 99- axles can be used in either application and that the 5mm difference in length is within the working range of the plunge of the CV joints. FWIW, I'll stick with the correct application for high performance applications. Apparently, the MSM (turbo Miata) has larger and heavier joints and axles.

Splines are the same for all years (non-turbo). The axle nut thread and nut is larger for the 95.5+ cars."