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4.77 gears?

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Old 07-14-06, 10:37 AM
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4.77 gears?
does anyone else have them?

ive been getting pm's about them for a while now and it is making me really curious about them, i havent seen anyone sell them anymore. I believe mine were bought from rx7.com,

i love them, i even have the jdm transmission and it drops top speed down to 156, but i tried going 0-156 mph once and it went by pretty pretty quickly,
anyone else want to weigh in on them?
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Old 07-14-06, 03:46 PM
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I'm running 4.30s and am very happy with the increase in acceleration.
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Old 07-14-06, 04:19 PM
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Originally Posted by GoodfellaFD3S
I'm running 4.30s and am very happy with the increase in acceleration.
what is your theoretic top speed with a 4.3?
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Old 07-14-06, 04:33 PM
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Yea...what's your top speed? Cuz 156 ain't cuttin it for me...that's for sure.
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Old 07-14-06, 05:26 PM
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According to the excel doc I downloaded a while back (JimLab thread maybe?) 5th gear at 8000 rpms with a 4.33 diff and stock wheel/tires tops out at 190.

If you had a J-Spec 5th gear (.806 vs .719 stock) and the 4.33 diff then you'd top out at 169.
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Old 07-14-06, 06:14 PM
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I have 275/40/17 rears, and with the increase in rolling diameter my effective final drive was at a shitty 3.90. The 4.3s basically got me back to the stock 4.1.
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Old 07-14-06, 06:37 PM
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GooRoo, would you mind emailing me that file? The944@aol.com

Thanks!
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Old 07-14-06, 09:36 PM
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Originally Posted by FDNewbie
GooRoo, would you mind emailing me that file? The944@aol.com

Thanks!
~Ramy
Ramy,

I emailed you a copy of the spreadsheet, just in case you didn't get it from GooRoo .
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Old 07-14-06, 09:55 PM
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Originally Posted by GoodfellaFD3S
I have 275/40/17 rears, and with the increase in rolling diameter my effective final drive was at a shitty 3.90. The 4.3s basically got me back to the stock 4.1.
I know it's not exact, but from a 55-16 to a 45-17 should keep your overall diamater the same. By having a 40 series sidewall, your diamater should decrease a little.
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Old 07-14-06, 11:17 PM
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4.33 mazda RZ gears. the best mod you can do to a auto.
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Old 07-15-06, 01:05 AM
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Thanks Richard and Andrew
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Old 07-15-06, 08:58 PM
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well with the stock 5th gear my theoretical top speed is 164

not bad still but i love jdm 5th

anyone have any more info about the 4.77s?
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Old 07-15-06, 09:11 PM
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Lightbulb
Originally Posted by Railgun
I know it's not exact, but from a 55-16 to a 45-17 should keep your overall diamater the same. By having a 40 series sidewall, your diamater should decrease a little.
Stock is 225/50/16 . Also don't forget about the 1 inch increase due to the rims themselves. I used an accurate spreadsheet, and my gearing went from 4.1 to 3.9.
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Old 07-15-06, 10:30 PM
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yeah...my memory is shot.

Fair enough.
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