Rx8 differential

Reply Subscribe

Thread Tools

Search this Thread

Oct 3, 2015 | 03:48 AM

MILOS7

Thread Starter

Rotary Enthusiast

iTrader: (3)

Joined: Oct 2008

Posts: 762

Likes: 22

From: los angeles

Rx8 differential

DOES THE RX8 DIFFERENTIAL FIT IN THE RX7 FD DIFFERENTIAL CASE?

I mean, can I just swap the rx8 diff. in the rx7 fd case ?

Oct 3, 2015 | 06:33 AM

RotaryEvolution

Sharp Claws

iTrader: (30)

Joined: Oct 2003

Posts: 5,107

Likes: 50

From: Central Florida

sure

Oct 3, 2015 | 11:00 AM

DaleClark

RX-7 Bad Ass

iTrader: (56)

Joined: Jan 2002

Posts: 15,622

Likes: 2,725

From: Pensacola, FL

Search, I have a pretty thorough writeup on this.

Dale

Oct 3, 2015 | 12:08 PM

K-Tune

FD Daily

iTrader: (27)

Joined: Jul 2003

Posts: 3,308

Likes: 14

From: Gulf Breeze, FL

Short answer: Yep.

You probably could have searched for this, or asked in your 4.44 thread.

Oct 3, 2015 | 12:43 PM

MattGold

Form > Function

iTrader: (116)

Joined: Dec 2003

Posts: 2,008

Likes: 239

From: Metro Detroit

Moral of the story: do your research before you buy.

Yes. You'll be fine with the 4.44 in the diff case. Just have a shop that knows what they're doing do the swap.

Last edited by MattGold; Oct 4, 2015 at 12:23 PM.

Oct 3, 2015 | 04:34 PM

RotaryEvolution

Sharp Claws

iTrader: (30)

Joined: Oct 2003

Posts: 5,107

Likes: 50

From: Central Florida

i thought the moral of the story was:

take a hammer to it, anything can fit with a hammer!

Oct 3, 2015 | 05:07 PM

MattGold

Form > Function

iTrader: (116)

Joined: Dec 2003

Posts: 2,008

Likes: 239

From: Metro Detroit

Quote:

Originally Posted by RotaryEvolution

i thought the moral of the story was:

take a hammer to it, anything can fit with a hammer!

This is also true.

Trending Topics

Ttt steering rack thoughts

13

477
6k ignition break up and tach goes wild simultaneously no matter the...

10

331
FrankenRex Will Rise: stuffing a GSL-SE into a'79 SA

309

31.6k
Engine o ring failure?

10

310
RX-7 SA 1979 - European - Aurora White "ETHEREAL"

7

201

Oct 3, 2015 | 05:30 PM

Tem120

Rotary Freak

iTrader: (5)

Joined: Sep 2011

Posts: 2,824

Likes: 6

From: Miami

Ok I only swapped the wiring and pinion on my diff for the ring and pinion on the rx8 I had a whole rx8 diff .. did I just screw up or is there a benefit to using the fd diff with rx8 ring and pinion??

Oct 4, 2015 | 12:00 AM

RotaryEvolution

Sharp Claws

iTrader: (30)

Joined: Oct 2003

Posts: 5,107

Likes: 50

From: Central Florida

both are torsens so there should be a negligible difference. however i hope you know how to properly set backlash, depth and adjust gear tooth patterns.

Oct 4, 2015 | 12:31 PM

#10

K-Tune

FD Daily

iTrader: (27)

Joined: Jul 2003

Posts: 3,308

Likes: 14

From: Gulf Breeze, FL

Quote:

Originally Posted by RotaryEvolution

both are torsens so there should be a negligible difference. however i hope you know how to properly set backlash, depth and adjust gear tooth patterns.

The rx-8 isn't a torsen. It's more like the tochigi fuji differentials found in some miatas. It has its advantages and disadvantages, but i'd pick the FD torsen if I had a choice.

Oct 4, 2015 | 03:00 PM

#11

RotaryEvolution

Sharp Claws

iTrader: (30)

Joined: Oct 2003

Posts: 5,107

Likes: 50

From: Central Florida

well that sucks, i got an 8's 3rd member LSD in the shop i was hoping to drop into my FC. maybe i'll just rebuild the clutch type S4 instead.

Oct 5, 2015 | 10:12 AM

#12

ondabirdhouse

Big Bird's Here!!!

iTrader: (26)

Joined: Feb 2010

Posts: 721

Likes: 2

From: Jacksonville, FL

That S4 clutch pack LSD is a lot more stronger then the 8's lsd from what I've read. I just picked one up for my FD because of this.

Oct 5, 2015 | 09:36 PM

#13

RotaryEvolution

Sharp Claws

iTrader: (30)

Joined: Oct 2003

Posts: 5,107

Likes: 50

From: Central Florida

clutch LSD's are great but they have the most limited lifespan, mine has always been a bit on the weak side. with 220k miles now it has seen better days.

Oct 6, 2015 | 10:09 AM

#14

Tem120

Rotary Freak

iTrader: (5)

Joined: Sep 2011

Posts: 2,824

Likes: 6

From: Miami

Quote:

Originally Posted by RotaryEvolution

both are torsens so there should be a negligible difference. however i hope you know how to properly set backlash, depth and adjust gear tooth patterns.

I had a shop do it LOL