JFD_8126

iTrader: (5)

Hey all,

I already searched for this topic on google, yahoo and also on this forum, but cannot find any info on this.

Are the N/A wheel hub same as the TII?

If they are,

are the splines different in the wheel hub.

What i am trying to do is add a tII differential in my miata, but im having a hard time finding TII wheel hubs. If i can use the N/A ones, that would save me time!

Much appreciation!

Dak

I am alittle confused by your question. When you say wheel hub I assume you mean the part the wheel bolts to. If I understand the differential swap correctly these aren't even touched so I don't understand why you need them. If you are refering to the axle stubs, the part that sticks out of the diff( that the half-shafts bolt to) they are different between the n/a and TII.

jjwalker

The wheel hub, meaning the part that bolts to the wheel... They are and aren't interchangeable.

I know the TII and vert hubs are the same. I believe there is another NA model that was also interchangable as well. If it is 5 lug, it'll fit.

As Dak said, you need the TII axle stubs, but hopefully those came with your diff when you bought it.

JFD_8126

iTrader: (5)

I have a 1993 Mazda Miata and i am going rotary(13BREW).

What i need is a stronger differential because the stock differential is:
-Weak and will not withstand turbo or stock 13BREW power
-6" diff which is to small
-Weak axles. Break on load

Solution is to go s4 Tii Differential with Tii Halfshafts:
- Bolts right up to my subframe
- Solution to withstand 13BREW power

Problem:
- The splines of the miata wheel hub will not support the TII Halfshafts male side.

Solution to the problem:
- Find a way to make the TII halfshafts work with my stock miata hub.
- The only way to do this is to machine down a TII Wheel hub to fit the miata hub housing.

So if the n/a 5 lugged wheel hubs are the same as the TII wheel hubs, then i am in business and wont have a hard time finding those because they are everywhere in my local wrecking yard.

If that clarified confusion, please help!

Much appreciation

Dak

From what little searching I did last night it looked like they were using '94-'95 Miata halfshafts as they bolt to the rx7 axle stubs. This was on a n/a rx7 diff. What you probably need to know is, is the bolt pattern on the n/a and TII axle stubs the same. From what I read it is the 6" ring gear that was the weak link. The n/a Rx7 is a 7" and the TII an 8". I didn't search to find how much the Miata shafts will handle but Google is your friend.


http://miataturbo.wikidot.com/differential
http://www.google.com/search?hl=en&s...AAAKoEBU_QjHLi

SpikeDerailed

iTrader: (7)

I dont have the parts in front of me but from what I remember the bolt spacing for where the axle bolts to the stub shaft was slightly larger on the turbo units.

JFD_8126

iTrader: (5)

Hmmmmmmmmmmm. I never thought about that. If the 94-95 Miata halfshafts bolts up to the tii differential, I don't have to modify my wheel hubs. I'll have to search around. Any more help would be great

JFD_8126

iTrader: (5)

Ok that solution will not work with a 94-95 halfshafts with a tii differential, source was from Solomiata.com. If anyone can tell me if the na wheel hubs are the same as the tii, please let me know

Black Knight RX7 FC3S

iTrader: (7)

I thought all 5 lug spindles are the same?
My TII halfshafts works with my GTUs rear spindle. It slides in perfect.
When I changed from the 4.3 diff to the TII 4.1 diff, only thing I changed was the halfshafts because you have to run TII halfshafts to bolt to the stubs, the spindle part slides right in.

JFD_8126

iTrader: (5)

I was trying to read online and see if anything changed in the rear end of all trim levels of the 2nd gen rx-7, but did not find anything. If all the trim levels have the same rear end, then i am in business. Thanks blacknight for that info. If anyone can double confirm this, that will be great!

misterstyx69

iTrader: (142)

Where the shaft Enters the hub?..it is the SAME size.
So the N/a and TII axles can slip into the Same hub,whether it be a four bolt or five bolt wheel hub.
The Part of the axle that connects to the Diff is different on a TII compared to an N/A.That is why you have to change the whole *** end out when you Convert N/A to TII.(Diff and Half shafts.
The driveshaft can be made up to go in between the TII Diff to N/a Trans or Vice Versa.Mazdatrix sells a Conversion shaft.

JFD_8126

iTrader: (5)

Bro thanks for clarifying that thanks and thanks to everyone else as well

misterstyx69

iTrader: (142)

Uh..no problem...Dad????.(haha!)