5.12 Rear Ends
#1
5.12 Rear Ends
The Mazda 5.12 rear end is desirable and rare. I have two and they cost me dearly.
They are made by Jesse Prather every decade or so once demand reaches a certain threshold and apparently it is there. If you are in the market for one or want to speculate on the market, contact him to place your order.
https://jesseprathermotorsports.com/new/
Alan
They are made by Jesse Prather every decade or so once demand reaches a certain threshold and apparently it is there. If you are in the market for one or want to speculate on the market, contact him to place your order.
https://jesseprathermotorsports.com/new/
Alan
#10
No respecter of malarkey
iTrader: (25)
it’s just an estimate based on what it used to sell for, but maybe the source is different now
also the MX5 is a different differential; smaller, more popular fitment into other models
you could do a search on it if you wanted
also the MX5 is a different differential; smaller, more popular fitment into other models
you could do a search on it if you wanted
Last edited by TeamRX8; 05-07-2020 at 11:37 PM.
#11
Registered
I have purchased a new 5.12 diff gear set from "nodlaww" off ebay (https://www.ebay.com/usr/nodlaww).
He's in Brisbane, Australia, and has been selling rear gears for RX-7s and RX-8s for at least a year and has 100% positive feedback.
With tax, shipping, and handling, the exchange rate convert to less than $800 (take the Best Offer route)
He even has 5.375 and 5.8 gear sets!
Here is a current listing as an example: https://www.ebay.com/itm/13340607156...m=133406071562
He's in Brisbane, Australia, and has been selling rear gears for RX-7s and RX-8s for at least a year and has 100% positive feedback.
With tax, shipping, and handling, the exchange rate convert to less than $800 (take the Best Offer route)
He even has 5.375 and 5.8 gear sets!
Here is a current listing as an example: https://www.ebay.com/itm/13340607156...m=133406071562
The following users liked this post:
racer-tom (05-12-2020)
#13
Registered
That's great to hear to provide some confidence in this vendor and approach.
My purchase has been shipped. I'll report on the transit time.
My purchase has been shipped. I'll report on the transit time.
Last edited by racer-tom; 05-12-2020 at 10:54 AM. Reason: added detail
#15
Registered
Originally Posted by trackjunkie
^ i bought one of those and had been running in my track car for over a season now.
I am considering 5.12 this year too
#16
Registered
my friend who installed the diff and a heck of time trying to shim it. none of the factory available shims seem to be the right fit. had to make some custom shims.
#17
Registered
Hello all,
I know this is quite the resurrection, but I have been looking into the 5.125 final gear as well, and also came across "nodlaww" on ebay.
I am unsure whether this guy is reputable, and reliable? He does not have a website, nor will he tell me who manufactures it (other than that it is made in China).
Could someone who have bought from him and used his product please let me know how did it go? Is the product good? Was it a direct bolt-on, or was there any processing required in order for this to fit?
Any help will be greatly appreciated!
Thank you!
I know this is quite the resurrection, but I have been looking into the 5.125 final gear as well, and also came across "nodlaww" on ebay.
I am unsure whether this guy is reputable, and reliable? He does not have a website, nor will he tell me who manufactures it (other than that it is made in China).
Could someone who have bought from him and used his product please let me know how did it go? Is the product good? Was it a direct bolt-on, or was there any processing required in order for this to fit?
Any help will be greatly appreciated!
Thank you!
#18
Registered
I think I bought from same guy
He is using same pic
I had 5.3 from him
Noisy then stock , even with correct backlash
But no issue with Intense track use
https://www.ebay.com/itm/Mazda-RX8-C...154756-20017-0
He is using same pic
I had 5.3 from him
Noisy then stock , even with correct backlash
But no issue with Intense track use
https://www.ebay.com/itm/Mazda-RX8-C...154756-20017-0
The following users liked this post:
Sato Tatsuya (07-25-2022)
#19
Registered
I think I bought from same guy
He is using same pic
I had 5.3 from him
Noisy then stock , even with correct backlash
But no issue with Intense track use
https://www.ebay.com/itm/Mazda-RX8-C...154756-20017-0
He is using same pic
I had 5.3 from him
Noisy then stock , even with correct backlash
But no issue with Intense track use
https://www.ebay.com/itm/Mazda-RX8-C...154756-20017-0
The following users liked this post:
Sato Tatsuya (07-25-2022)
#21
Registered
I thought I read somewhere on the forum that some was able to directly bolt it on, while someone else had to do some sort of processing or adjustment?
#22
Registered
I bought a set from him a few months ago. Came in like 2 weeks. 10/10 would recommend.
Currently working on building the axle. So far the only thing I have to worry about is the pinon gear spacer.. but that's par for the course, and I am also putting a Cusco LSD in there so..
Currently working on building the axle. So far the only thing I have to worry about is the pinon gear spacer.. but that's par for the course, and I am also putting a Cusco LSD in there so..
#23
No respecter of malarkey
iTrader: (25)
bought a 5.125 recently as a backup plan with the CD009 trans; using 2nd gear for drag launching with 1st reserved as a low speed pit/trailer gear, still reasonably low priced even with tax and shipping due to the exchange rate
it should allow 30 - 80 mph in 3rd without shifting for autox
bought some parts and tools directly from AU recently as well for the same reason
with the 5.3 and 5.8 gears the extreme tooth contact and resulting scrub is likely the noise issue. The 5.1 was already pushing it …
11p/41r = 3.727
11p/43r = 3.909
10p/41r = 4.100
10p/43r - 4.300
9p/40r = 4.444
9p/43r = 4.777
8p/41r = 5.125
8p/43r = 5.375
7p/41r = 5.857
.
it should allow 30 - 80 mph in 3rd without shifting for autox
bought some parts and tools directly from AU recently as well for the same reason
I think I bought from same guy
He is using same pic
I had 5.3 from him
Noisy then stock , even with correct backlash
But no issue with Intense track use
https://www.ebay.com/itm/Mazda-RX8-C...154756-20017-0
He is using same pic
I had 5.3 from him
Noisy then stock , even with correct backlash
But no issue with Intense track use
https://www.ebay.com/itm/Mazda-RX8-C...154756-20017-0
with the 5.3 and 5.8 gears the extreme tooth contact and resulting scrub is likely the noise issue. The 5.1 was already pushing it …
11p/41r = 3.727
11p/43r = 3.909
10p/41r = 4.100
10p/43r - 4.300
9p/40r = 4.444
9p/43r = 4.777
8p/41r = 5.125
8p/43r = 5.375
7p/41r = 5.857
.
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