Help me identify this diff cover
#1
RX-7 Guru
Thread Starter
![Thumbs up](https://www.rx8club.com/images/icons/icon14.gif)
Hey guys -
Bought an RX-8 diff to pull the ring and pinion for my RX-7. Just arrived today, hopefully I'll be able to tear into it soon.
From what I understand, this diff was from an 04-08 manual trans RX-8. But, the diff cover has this weird aluminum kick-out, like a heat sink. Every other RX-8 diff I've seen (and RX-7 diffs) don't have this.
Marking the input flange and ring gear, turning the input flange, and counting rotations I get just shy of four and a half input rotations to one ring rotation, so it seems this is a 4.44 gear.
Can anyone tell me why this is different? I'm also hoping this cover will work on the FD diff
.
Thanks!
Dale
Bought an RX-8 diff to pull the ring and pinion for my RX-7. Just arrived today, hopefully I'll be able to tear into it soon.
From what I understand, this diff was from an 04-08 manual trans RX-8. But, the diff cover has this weird aluminum kick-out, like a heat sink. Every other RX-8 diff I've seen (and RX-7 diffs) don't have this.
Marking the input flange and ring gear, turning the input flange, and counting rotations I get just shy of four and a half input rotations to one ring rotation, so it seems this is a 4.44 gear.
Can anyone tell me why this is different? I'm also hoping this cover will work on the FD diff
![Smilie](https://www.rx8club.com/images/smilies/smile.gif)
Thanks!
Dale
#5
RX-7 Guru
Thread Starter
It does seem to be a stock part and not an aftermarket cover. Also, the ring gear in the diff appears to be an 8" ring gear if that helps any.
So, possible it's from a Series 2 RX-8?
Any more input is greatly appreciated! If you need any more info or pics I'll be happy to oblige.
Thanks!
Dale
So, possible it's from a Series 2 RX-8?
Any more input is greatly appreciated! If you need any more info or pics I'll be happy to oblige.
Thanks!
Dale
#9
RX-7 Guru
Thread Starter
Just answered my own question -
http://www.mazdausa.com/MusaWeb/disp...ehicleCode=RX8
The S2 RX-8 (at least the 2011) has a 4.77 on the manuals, 4.3 on the automatics.
Do all S2 RX-8's have this new style cover? If so, that cover might be a cool upgrade for the S1 cars.
Dale
http://www.mazdausa.com/MusaWeb/disp...ehicleCode=RX8
The S2 RX-8 (at least the 2011) has a 4.77 on the manuals, 4.3 on the automatics.
Do all S2 RX-8's have this new style cover? If so, that cover might be a cool upgrade for the S1 cars.
Dale
#13
RX-7 Guru
Thread Starter
Here's a pic of the diff itself. It looks really simple, I'm thinking it's an open diff.
Just looks like some small gears and springs inside.
So the consensus is the diff cover means it's from an S2?
Dale
Just looks like some small gears and springs inside.
So the consensus is the diff cover means it's from an S2?
Dale
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