does S2 auto rear diff have 4.7

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Dec 18, 2017 | 11:23 PM

trackjunkie

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From: South Central PA

does S2 auto rear diff have 4.7

i'm looking for build a 4.7 diff for track car and used s2 auto diff are cheaper. i would also upgrade to OS Giken. Just need to know if they are 4.7

thanks,

Dec 19, 2017 | 01:05 AM

TeamRX8

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The Auto was 4.30 only

https://www.mazdausa.com/MusaWeb/mus.../specs_RX8.pdf

Dec 19, 2017 | 10:08 AM

NotAPreppie

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From: 2017 Miata RF Launch Edition

Why not go with a 5.12 and call it a day?

https://www.ebay.com/itm/Mazda-RX7-R...hTM047&vxp=mtr

Last edited by NotAPreppie; Dec 19, 2017 at 10:11 AM.

Dec 19, 2017 | 10:14 AM

trackjunkie

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I wanted to do 5.1 but wasn't able to find a good source to get one.

Dec 19, 2017 | 12:32 PM

TeamRX8

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They’re a bit rare now that Mazda Motorsport sold all theirs and didn’t reorder any more.

.

Last edited by TeamRX8; Dec 19, 2017 at 10:59 PM.

Dec 19, 2017 | 12:38 PM

trackjunkie

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i've only been able to find them from japan for around $1500, but i'm not sure how reliable those sites are.

Dec 19, 2017 | 01:11 PM

NotAPreppie

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From: 2017 Miata RF Launch Edition

You mean aside from the link I posted above?

Dec 19, 2017 | 01:13 PM

trackjunkie

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^ I contact him to see if he had 5.1, the auction was for 5.3

Dec 19, 2017 | 01:17 PM

NotAPreppie

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From: 2017 Miata RF Launch Edition

Real men run the 5.8

Dec 19, 2017 | 02:21 PM

#10

trackjunkie

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lol. he said he has the 5.8, would that require you to use 6th on some higher speed tracks?

Dec 19, 2017 | 10:58 PM

#11

TeamRX8

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Actually I fubar’d about the price earlier and now think it was a lot higher like $1200+

Dec 19, 2017 | 11:03 PM

#12

trackjunkie

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I ordered the one from the link above. $800 shipped. He said it made in China. So we'll see how it works out.

Dec 20, 2017 | 02:33 AM

#13

TeamRX8

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I just made a post in the DSP race thread about trans/rear gear combos. That gear with the Series 2 trans makes a nice combo on the track for a 70 - 130 mph range in 3rd - 5th gear