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. |
DOOD
I want. edit: i'm not paying for shipping. |
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.
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so... what year brainsy?
randy's site says 79-83 had the 11:43 3.909 ratio. |
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. |
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 |
Originally Posted by akaryrye
(Post 87373)
The pinion will be too long for a miata, the RX7 pinion gears are not interchangable with the 7" miata
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Originally Posted by ruger988
(Post 87375)
then how do so many people run RX-7 LSD's in the 1.8 diff housings?
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see this:
http://images.channeladvisor.com/Sel...0552.JPG_s.jpg 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: http://i4.ebayimg.com/03/i/07/65/90/88_1.JPG the 86-88 pinon housing is the "long" nose and will not fit: http://i17.ebayimg.com/06/i/000/8e/5f/fed5_1_b.JPG 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. |
Originally Posted by ruger988
(Post 87375)
then how do so many people run RX-7 LSD's in the 1.8 diff housings?
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Originally Posted by ruger988
(Post 87375)
then how do so many people run RX-7 LSD's in the 1.8 diff housings?
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? |
sorry to threadjack, but does anyone have a link to any good information on setting the backlash? It does not have to be specific but I want to understand the principle.
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Originally Posted by y8s
(Post 87547)
Anyway, scottbrain, can I get a "if it dont fit, you must acquit" money-back guarantee?
Originally Posted by akaryrye
(Post 87550)
sorry to threadjack, but does anyone have a link to any good information on setting the backlash? It does not have to be specific but I want to understand the principle.
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confirmed, 11 pinion teeth, 43 gear teeth. 43 / 11 = 3.909
Matt whenever you wanna pick it up I should have it, expect for tonight as I'll be watching the Wizards & The Heat |
ok. Friday Donut?
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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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