The elusive 3.308:1 rear diff
#21
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Don't forget the 4.875 and 5.1 when you play with ratios, but you would need a 6th gear from a T56 to make them civil on the freeway... ![](https://www.miataturbo.net/images/smilies/smile.gif)
A 6speed with my 4.875 would be nice on track (1st a trailer gear), but I have one track where the top speed will be limiting (a 4.3 diff would be nice there, Sportage gears require more work).
Playing with gearbox internals is a clear level above juggling with diffs. Cost/complexity of a custom 6th gear?
![](https://www.miataturbo.net/images/smilies/smile.gif)
A 6speed with my 4.875 would be nice on track (1st a trailer gear), but I have one track where the top speed will be limiting (a 4.3 diff would be nice there, Sportage gears require more work).
Playing with gearbox internals is a clear level above juggling with diffs. Cost/complexity of a custom 6th gear?
#22
Elite Member
Thread Starter
iTrader: (1)
Join Date: Jun 2012
Location: NH
Posts: 9,483
Total Cats: 104
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
The 4.3 already makes 3rd "perfect" on the 6 speed. But I would prefer to not have a 5 speed with a retarded shift pattern.
I actually sent a friendly message to mfactory letting them know that all their s2k ring gear stuff should fit miatas and suggesting a 3.308 ratio be added. They already have one of the harder parts, getting the ring gear forging. They would just need to get a different thread pitch hobb and modify the program on their gear grinder. We'll see. I predict they will come back with their standard "get 25 pre-orders and we'll do whatever you want". OR they could just be selling mazda and kia factory r&p sets to the s2k people who dont know any better at a steep mark up.
I actually sent a friendly message to mfactory letting them know that all their s2k ring gear stuff should fit miatas and suggesting a 3.308 ratio be added. They already have one of the harder parts, getting the ring gear forging. They would just need to get a different thread pitch hobb and modify the program on their gear grinder. We'll see. I predict they will come back with their standard "get 25 pre-orders and we'll do whatever you want". OR they could just be selling mazda and kia factory r&p sets to the s2k people who dont know any better at a steep mark up.
Thread
Thread Starter
Forum
Replies
Last Post
bigmackloud
Miata parts for sale/trade
19
01-08-2021 11:24 AM
StratoBlue1109
Miata parts for sale/trade
21
09-30-2018 01:09 PM