Z31 rear conversion

[steves12zx]

So does this mean you can use a whole rear end setup from a Z31 turbo (they have an LSD as standard) to get the vented brake upgrade and also and LSD.

Also if the LSD is bolt in can you just use the LSD and shafts from a Z31 turbo with the S12 subframe and hubs???

[CamInHead]

I think the driveshafts would be different. Better to get the whole Z31 rear set-up but I'd expect the LSD to be fairly tired after 20-odd years.

[s13eater]

i've got hold of a z31 turbo rear subframe and trailing arms, only thing that ive noticed is that where the shafts mount to the back of the hub they are 4 bolt instead of the s12 6 bolt set up, are the shafts the same spline set up as the s12 ones ?if so i could just change the ends.

[CamInHead]

trust me Randy wanted that thing to work...
So did I.

No the Z31 sub-frame does not work. it has arc that hits the body.
the Z31 control arms Bolt up to S12 direct bolt in, brakes and all.

this is what i have and how i did my 5 lug conversion in the rear.

Here

I hope this fella is wrong as I just dropped £100+ getting my spare z31 x-member prepaired

Not really sure what he means by "it has arc that hits the body" ?

[s13eater]

Originally Posted by CamInHead

Here

I hope this fella is wrong as I just dropped £100+ getting my spare z31 x-member prepaired

Not really sure what he means by "it has arc that hits the body" ?

hi mate, to me i think he's put it in upside down, if you turn it over, then it sits higher where the diff mounts, just a wild guess though.

[CamInHead]

fookin hope so. I sat on that thing for 6 months then see this less than a week after actually comitting some proper monies to my "project" lol (maybe). I'm 99% sure I've seen posts before that say they're identical.

how does your turbo subframe compaire to S12 regular ? I've never actually gotten a good look at the two together.

[s13eater]

Originally Posted by CamInHead

fookin hope so. I sat on that thing for 6 months then see this less than a week after actually comitting some proper monies to my "project" lol (maybe). I'm 99% sure I've seen posts before that say they're identical.

how does your turbo subframe compaire to S12 regular ? I've never actually gotten a good look at the two together.

i'll put it under 2moz mate and let you know.

[CamInHead]

Originally Posted by s13eater

i've got hold of a z31 turbo rear subframe and trailing arms, only thing that ive noticed is that where the shafts mount to the back of the hub they are 4 bolt instead of the s12 6 bolt set up, are the shafts the same spline set up as the s12 ones ?if so i could just change the ends.

I've just pulled my N/S S12 half-shaft and trailing arm off and the hubs are different. Stock S12 has 6stud 3x2 but my Z31s are 4x1, same as yours. Also, the input shaft (diff end) is slightly larger and the (spider?) bearing is totally different.
So I'm a bit lost right now.

Can someone confirm a stock UK Turbo comes with the R200 diff ?

[s13eater]

Originally Posted by CamInHead

I've just pulled my N/S S12 half-shaft and trailing arm off and the hubs are different. Stock S12 has 6stud 3x2 but my Z31s are 4x1, same as yours. Also, the input shaft (diff end) is slightly larger and the (spider?) bearing is totally different.
So I'm a bit lost right now.

Can someone confirm a stock UK Turbo comes with the R200 diff ?

just measured the z31 and s12 shafts matey, they both measure 29.5mm and are 29 spline and the s12 is a r200 diff.

[CamInHead]

Originally Posted by s13eater

just measured the z31 and s12 shafts matey, they both measure 29.5mm and are 29 spline and the s12 is a r200 diff.

We tried to swap over the driveshaft bearing at the diff end and the Z31 input shaft is just slightly too wide to accept the stock S12 bearing ?
Granted I don't have a vernier to measure it though.

edit: did you notice the Z31 has symmetrical driveshafts too ?