I'm Back! '90 GTUs

infernosg · 05-12-2016, 08:43 AM

I'd say about as much as the N/A RX-7 transmission. That is, not too much. I've seen both transmissions completely disassembled and I didn't see anything that would indicate the Miata gear set is any stronger or weaker. That's not to say there aren't any differences. I used a gear set from a '96 Miata and I noticed the following differences versus my stock '89 transmission:

-Second gear has two synchronizers
-The reverse gear has a helical cut
-Small casting differences in the bearing plate
-No gigantic weight on the output shaft

I used the front (bell), gear (middle), and rear (tail) housings from the RX-7 transmission. The bearing plate and everything else were from the Miata transmission.

05-12-2016, 08:43 AM	#10
infernosg IT'S ALIVE! Join Date: Dec 2009 Location: Richmond, VA Posts: 811 Rep Power: 17	I'd say about as much as the N/A RX-7 transmission. That is, not too much. I've seen both transmissions completely disassembled and I didn't see anything that would indicate the Miata gear set is any stronger or weaker. That's not to say there aren't any differences. I used a gear set from a '96 Miata and I noticed the following differences versus my stock '89 transmission: -Second gear has two synchronizers -The reverse gear has a helical cut -Small casting differences in the bearing plate -No gigantic weight on the output shaft I used the front (bell), gear (middle), and rear (tail) housings from the RX-7 transmission. The bearing plate and everything else were from the Miata transmission. __________________ '86 Mazda RX-7 Base '79 Mazda RX-7 GS

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