RX8 ring and pinion in NA/NB
so I have fond some internet posts that say the RX8 R&P might work in out diffs. Or at least that the ring is 7". I'm in the hunt for 4.44 gears and wondered if anyone has expereance with this?
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AFAIK the ring gear in RX8s is 8 inch diameter, not 7. Your best bet is a Kia Sportage donor from a specific region (most regions received the 4.77).
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Not likely. The Rx8 shares a R&P with the FD, so it's almost certainly an 8" and not a 7".
4.778 7" Kia Sportage gears are virtually impossible to find in a junkyard, but they can be had brand new for <$300. |
Mazda 7" 4.44 Ring and pinion can be found in early mazda 4x4 or ford courier front diffs. 1989 - 1995 from memory. Not sure if they were ever sold in the US or what they were called.
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Originally Posted by Savington
(Post 1389525)
Not likely. The Rx8 shares a R&P with the FD, so it's almost certainly an 8" and not a 7".
4.778 7" Kia Sportage gears are virtually impossible to find in a junkyard, but they can be had brand new for <$300. wow now I look and they are all gone on car-part.com. somebody must be buying them all up. |
Originally Posted by bbundy
(Post 1389640)
I don't know what junk yards you're looking in but I have easily found them. I've bought 2 at $50 for the whole pumpkin.
wow now I look and they are all gone on car-part.com. somebody must be buying them all up. |
Originally Posted by Savington
(Post 1389648)
I looked briefly in ~2013 when I was building my 4.77 OSG for PTE and had no luck. They were also so cheap brand new that it was hard to justify taking a risk on used gears (already spending ~$300 on setup, not to mention the $1600 diff).
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So our main option for lowering the gear ratio is street cars is still the 3.636? NO magic sauce?
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The inevitable T5 conversion will negate the need for anything lower than a 3.63
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Thought those were only rated at 300ft/lbs?
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Originally Posted by Lexzar
(Post 1389678)
So our main option for lowering the gear ratio is street cars is still the 3.636? NO magic sauce?
I used the 4.778 with the Quaife Wide. this makes second gear about the same as the 3.636 six peed actually a bit faster For track purposes only Id probly run a 3.909 with the six speed and a 4.30 with the Quaife. Neaither of those transmissions has proven to be bullet proof reliable however with over 300ft-lbs of torque but the gear ratios are not bad. |
Originally Posted by bbundy
(Post 1390032)
for me 3.636 with the six speed only if your primary use is Autocross and street.
... For track purposes only Id probly run a 3.909 with the six speed |
The 6 Speed with a 3.909 is basically a 5 speed with a 4.77, but with a nice overdrive for cruising.
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Or a racing overdrive for turbo cars :)
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Originally Posted by Savington
(Post 1389679)
The inevitable T5 conversion will negate the need for anything lower than a 3.63
There is going to be quite a few dog box Miatas running around with a gazillion horsepower! Trying real hard not to phone you every 5 minutes!! :) :) |
Originally Posted by Lexzar
(Post 1389680)
Thought those were only rated at 300ft/lbs?
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Originally Posted by Lexzar
(Post 1389680)
Thought those were only rated at 300ft/lbs?
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