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The ChampCar Endurance Series Tech Team

2022-12-26 - NA to NB Miata transmission swap

The 5 speed NA and NB Miata transmission have exactly the same parts, gearing, functionality and fitment. Only difference is the shifter which provides no advantage, arguably the NB being the weaker one.
Is there any way to allow NB transmission swap into NA chassis? I know it's irrelevant but in SM is allowed to swap either/or since they provide no advantage between them.
Reason I am asking is because NAs are slowly becoming more rare and an NB transmission is much easier to source out.
Some people may argue that NB is better built but it's not. All transmissions that I personally seen fail while competing in SM were ironically NBs not NAs.
Can we please allow this swap for free since it's initially the same transmission? They even look completely the same so unless the VIN is present there is no way to know unless the shifter is removed.

The transmissions are the same other than the shifter housing and beings shifters are free the NA & NB 5 speeds are considered the same and no swap fee applied..

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