13b + miata transmission???
Hello all,
I'm new here and trying to get an answer to: Which year(s) 13b's will bolt up to a miata transmission? I have a 94 miata transmission that I want to mate to a soon arriving 13b NA, BUT, I'm not sure which years make this swap possible. I already tried an FD transmission and it does not match up... So before I get another incorrect tranny, can someone please point me in the correct direction :scratch: THANKS! |
What didn't the FD trans match up against?
I don't think any bolt right up. I think the bell housings are different. Maybe also the location of the input shaft. I have read of people installing the guts of the Miata trans inside of a rotary trans. |
You need to mod the input shaft in order to make it fit.
Miata Input Shaft Modification Most people use the gears out of miata tranny like gracer7 said. |
The miata bellhousing, input shaft and tailshaft housings are different than the N/A RX-7 trannies. A lot of guys just swap the gears into an RX-7 Tranny instead of reusing the whole thing.
In my Miata I added an RX-7 bellhousing to my Miata tranny so a 13b would work with the stock tranny in my car. The input shaft still needs to be machined as it it too long. If you are using an rx-7 chassis your best bet would be to swap the Miata internals into the RX-7 case. |
this always confused me.
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Are the miata gears more robust than the S4 N/A gears?
I feel like it would be a waste of time to swap my auto with a N/A S5 manual box. |
i dont think the miata boxs are tougher than a s/4 box, especially not a turbo box
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Thanks for the replies guys, got it figured out now.
Its not going into an Rx7 chassis, its going into a 240Z.... I know the miata transmission is almost 20lbs lighter than the FD trans, So I'm guessing its still also a good amount lighter than the FC..... So I'm gonna use the miata if I can. |
Anyone know the weight of that NA 13b transmission?
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And a place to get at least the front housing so I can do this swap?
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Originally Posted by tervanun
(Post 11177875)
Anyone know the weight of that NA 13b transmission?
Originally Posted by tervanun
(Post 11177877)
And a place to get at least the front housing so I can do this swap?
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basing a decision based on the weight of a transmission is generally a bad choice to start with. if i had an FD, FC n/a and a miata box i can tell you which one i would almost always pick.
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