3.909 Ring and Pinion - 7"
#1
Boost Czar
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3.909 Ring and Pinion - 7"
Have a 3.909 ring and pinion off an RX7. Will fit all 94-05 diffs.
dunno if any of you are looking for taller gears who have a 4.3 torsen, but here ya go.
$75 plus shipping.
dunno if any of you are looking for taller gears who have a 4.3 torsen, but here ya go.
$75 plus shipping.
#3
Um......if its out of an RX7 diff, then the pinion won't fit a Miata, its far too long, the housing is very different than the Miatas. Only the ring gear will transfer. Of course, that is unless the pinion gear is out of a 1st gen RX7, then it would work as they have the same length pinion gear.
#5
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its from a 85 GSL...I can double check the teeth count to make sure...I'm pretty sure Randy has all the RX7 ratios wrong. should be 11 pinon teeth and 43 ring teeth, but like i said I'll double check.
Karter, it's from a short pinon nose RX7 diff. It's the exact same. infact I could bolt the pinon housing up to my carrier, but then I wouldn't have the PPF brackets.
from all the research I've done:
The 84-85 GSL is a 3.909.
The 84-85 GSL-SE is 4.08.
The 86-88 BASE, SPORT, SE and GXL is 4.10 w/manual, 3.909 with auto.
Karter, it's from a short pinon nose RX7 diff. It's the exact same. infact I could bolt the pinon housing up to my carrier, but then I wouldn't have the PPF brackets.
from all the research I've done:
The 84-85 GSL is a 3.909.
The 84-85 GSL-SE is 4.08.
The 86-88 BASE, SPORT, SE and GXL is 4.10 w/manual, 3.909 with auto.
#6
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The pinion will be too long for a miata, the RX7 pinion gears are not interchangable with the 7" miata
edit, missed your post scott didnt realize there were short housings that came on some rx7s
edit, missed your post scott didnt realize there were short housings that came on some rx7s
#9
Boost Czar
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see this:
The 84-85 pinon housing is the same length as for the miata. I will measure each and show a comparison. What isn't the same is the cast for the PPF mounts for the miata. Otherwise it could bolt right up.
miata housing:
the 86-88 pinon housing is the "long" nose and will not fit:
the funny part is, the 84-85 pinon housing is the only part you can use, as the car is a solid rear axle. the 86-88 pinon housing cannot be used, as it is too long, however, you can use the carrier.
The 84-85 pinon housing is the same length as for the miata. I will measure each and show a comparison. What isn't the same is the cast for the PPF mounts for the miata. Otherwise it could bolt right up.
miata housing:
the 86-88 pinon housing is the "long" nose and will not fit:
the funny part is, the 84-85 pinon housing is the only part you can use, as the car is a solid rear axle. the 86-88 pinon housing cannot be used, as it is too long, however, you can use the carrier.
#11
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setup. you can swap only the ring gears and MAYBE bearings and then setting backlash is really easy.
I'm not sure about pinion depth. T'will be a challenge.
Anyway, scottbrain, can I get a "if it dont fit, you must acquit" money-back guarantee?
I'm not sure about pinion depth. T'will be a challenge.
Anyway, scottbrain, can I get a "if it dont fit, you must acquit" money-back guarantee?
#13
Boost Czar
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#16
Boost Czar
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probably won't be there either, I close tomorrow and will be slaving away at the new place and then going out with the wifey to celebrate. just give me a call whenever, you know the numba.
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