ruger988

I know both the 1.8L tranny/rear end and the RX-7 rear end/tranny somewhat bolt in... but which parts out of which cars and what year fit where? what all will i need to get from each?

I want to do an rx-7 tranny/rear -end if possible but it'll probably be the most difficult to do...what all will i need out of the rx to make it easiest?

EDIT: this will be going in a 1990 1.6L

turbopezz

its going to be harder than you think.
http://www.geocities.com/crash41301/

olderguy

iTrader: (19)

http://members.aol.com/solomiata/Drivetrain.html

If you have not, you might want to read through this.

hustler

iTrader: (6)

mark williams will make custom ring and pinions at a fair price. I may have one drawn up for my car soon. You can run a clutch type aftermarket diff and ring/pinion for a decent price, and not have to worry about fab.

Braineack

iTrader: (62)

He said he had a RX7 read-end. But didn't specify if it was a TII. If not and it's a standard 84-89, 91-94 rear, then both can work without fabrication. What rx-7 rear do you have?

bripab007

It's the '86-'91, non-turbo RX-7 diffs. that you want. Most likely the '86-'89 S4 diffs., as those are the ones with clutch-type diffs. The '93-'95 RX-7s (FD) used 8" rears that will take mucho fabrication to make work, just like the 8" from the '86-'91 Turbo II.

You should really search on this, as I know I've answered this exact question a number of times.

akaryrye

iTrader: (5)

Ok ive been looking at some of the salvage yard sites for an RX7 diff assembly and have a few further questions. Does it matter if the axle is locking or non-locking, if the car is automatic or manual, or if the car is convertible or coupe? I ask because this is how the sites I am looking at are sorting their parts.

Also are there any models that had an open differential?

Oh yeah, also, i found two listed under "nonturbo, m/t, coupe" fpr $165 + $75 for shipping, im looking for a little lower, whatcha think?

bripab007

A "locking" axle means limited-slip. I suspect you want an LSD, right?

akaryrye

iTrader: (5)

yes definitely, so if its listed under non-locking then it is an open differential?

bripab007

Ummm...yes.

akaryrye

iTrader: (5)

Ok i have someone from the rx7 boards who has one but he wants a picture of the unit just to make sure its the right one. anyone have a picture of it?

dc2696

iTrader: (2)

I'm confused, aren't you the one buying something here? Why do ou need a picture?...I don't get it lol.

Braineack

iTrader: (62)

1. 1.8 open converted to RX7 LSD:

Parts:
94-05 1.8 Miata open assembly
84-91 NON-TURBO Rx7 clutch-type lsd (89-91 is a viscous, don't bother)
94-95 Miata stub shafts or 86-88 RX7 stub shafts and 94-95 Miata half-shafts
or 96-05 Miata axles (no stubs needed)
RX7 Circlips (fit onto the end of the stubs/axles, miata clips will not fit)
94-05 Miata driveshaft
Miata or RX7 ring and pinon (ring teeth / pinon teeth = end-ratio)


2. 86-88 RX7 assembly conversion:

Parts:
86-88 RX7 NON-TURBO differential assembly
94-95 Miata stub shafts or RX7 stub shafts and 94-95 Miata half-shafts
or 96-05 Miata axles (no stubs needed)
RX7 Circlips (fit onto the end of the stubs/axles, miata clips will not fit)
94-05 Miata driveshaft
Miata or RX7 ring and pinon (ring teeth / pinon teeth = end-ratio)
Miata Pinon housing (pumpkin) (find at RX7 performance shops)
Miata Diff. Bushings


84-85 RX7 LSD PUMPKIN

Mach929

iTrader: (3)

i hope that's a table painted to look like your car!

akaryrye

iTrader: (5)

brain, you are the man, thanks

VRTSid

is this the same if you have a 1.8 torsen?

if so Im picking up a lsd asap!

Braineack

iTrader: (62)

yeah, you can pull out the torsen and sell it on EBAY and walk away with money in your pocket after the RX7 swap.

I'll do a write-up when I perform my RX7 LSD swap so you guys can get a better idea of exactly what to do.


akaryrye, PM R-1 on rx7club.com, he should have one. It will measure 7" diameter on the ring-gear, 6" without the gear attached.

akaryrye

iTrader: (5)

In the meantime, I have been messaging back an fowarth with the guy and he sent me a picture, but it does not look exactly like the one you put up brian, almost looks like an aftermarket piece.



heres another pic of an rx7 diff i found earlier:

bripab007

I'm Brian...he's "Brain." Although I couldn't begin to tell you how many people have misspelled my name as "Brain" over the years...never figured out why. I mean, it's one thing when it's Valentine's Day in 2nd grade and a fellow 7-year-old gives you a card that says, "Would you be my valentine, Brain." Not sure why it still happens.

VRTSid

Im just glad that I wasnt the only one that thought the solo miata instructions were a little obtuse.

could that other diff, be like a mazdaspeed special or somthing like that, oem but similar sized?