So as I swap the 2005 motor into the 1993 chassis I'm faced with YET ANOTHER issue. 2005 trans uses electronic sensor for the speedo while the 1993 car uses a cable. Do I need to swap in an NB cluster? What else is required when this happens? Is there a simpler path?
Should I shop around for an old RX-7 trans with the lower gear ratio for better highway cruising?
If its the 5 spd, the cable and sensor/gear from your NA should mount directly to the new transmission. I am not sure what sensor the 6 spd uses. You may have to get a different cable sensor with the right gear if you changed the gearing in the rear end. I did the opposite and used an NB electric sensor in my NA 5 spd for my locost to use with my Autometer speedometer.
Same with the 6-speed. Just take the electric sensor out and plug in the cable.
The RX7 trans is not a bolt-in.
Keith Tanner said:Same with the 6-speed. Just take the electric sensor out and plug in the cable.
The 5 speed cable works in the 6 speed?
RX-7 gear cluster probably will not work in a Miata no matter what you do because the input shaft is too short.
B2200 looks like it has the same/similar gear ratios as pre-FC RX-7 (3.6ish 1st, 2.2ish 2nd) and I have been told that it has a long input shaft like a Miata. You'd still need to change the front housing and tailhousing for Miata bits, though, and the wider spaced transmissions shift a lot worse than Miata transmissions do.
Trick question! Mazda didn't use a cable in the 6-speed. But the cable and the speed sensor are interchangeable and the 5- and 6-speed sensors are interchangeable, so you can plug an NA cable into a 6-speed trans. You may want to change the gear on the end of the cable depending on how you feel about speedo/odo accuracy. Some folks have dived much deeper than I into this area.
Pete. (l33t FS) said:The 5 speed cable works in the 6 speed?
Yup. That's how my NA is set up... original 1991 cable bolted into NB2 6 speed.
Same housing/fitting - early ones have a gear that turns a cable, on the later ones the gear generates an electrical signal.
Edit: Keith beat me to it while I was typing...
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