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Nismo 2-way Diff Install Problem

Curmi
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Curmi Grand Master

Curmi

Posted
Posted

ok i brought a second hand nismo 2-way diff centre..

so today went to install it and have come into a pickle.i went to put the r200 stock gear around the 2way and the bolts that where on the stock gear do not fit in the 2way they are too big..

why is this?

what are my options now?

only thing i can think of is to buy new gears.

thanks for your help

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bubba Grand Master

bubba

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IIRC, the difference between an R33 and R32 R200 centre, is the R33 has larger diameter bolts... maybe you had a 33 diff in there to start with..

But yes, when you buy the Nismo 2-way kit new it comes with lots of stuff like new crown wheel bolts, new gasket, flanges, oil etc.

Curmi Grand Master

Curmi

Posted
  • Author
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its going into a r32 gts-t so s13 diffs are the same r200.....and no the bolts are off my stock r32 not r33. all i have to do is drill the holes bigger now iam worried about the shafts will the stock r200 shatfs fit into the nismo 2-way?

thanks for the comments guys

turboedsloth Grand Master

turboedsloth

Posted
Posted

test them out before drilling anything it'll take 5 minutes an if they dont fit sell the unit an buy one to suit your car or buy the other gear to make the diff fit in your car

T04GTR Grand Master

T04GTR

Posted
Posted

no they will not. you need the matching nismo stub axles. thats if its a nismo one,

unless you have an open (non lsd) r200 where you have to swap the stub axels left to right

could be out of a early dr30. as far as im aware all the diffs hr31 onwards used 12mm bolts. exceps the silvias. and when you get a nismo diff it comes with spacers for the bolts. the opposite of your problem.

what was it out of?

nat0z Collaborator

nat0z

Posted
Posted

i have done a centr swap in my 240/260z long nose r200 housing, the early Z diffs (fuji/subaru as are the later sklines) use M10 crownwheel bolts, i bought a used tomei r32 gtr centre off ebay a 2 way mech lsd.

one thing i found that the diff shop really wasnt keen on doing the swap, but aggreed to give it a look over.

after no response i went there paid 40$ for nothing and did the swap myself.

turns out the 32 gtr/r33 used an M13 bolt (yes M13???? go figure) so what i had to do was machine some bush's spacer @ 13.1 od 10.0 id x 11mm long for the 10 bolts.

as far as side/half shafts i had another circlip groove cut on the drivers side shaft to match the clip in the 32 centre, speced of the gear mesh and lash adj (happened to use the supplied shims that came with the centre and it was spot on lash wise)

from what youre saying it sounds as though you may have either 10mm ?? holes in your new centre yes you could just drill out to suit, but do so carefully.

after my install i was/am able to use the std 32/early 33 shafts (29 splines) they plug/play no problems, but i can still use the old uni joint hafshafts because i had the extra groove cut in.

i have done a pretty visual show of what i had done on vicZcar forum if you are interested

cheers nat0

Curmi Grand Master

Curmi

Posted
  • Author
Posted
i have done a centr swap in my 240/260z long nose r200 housing, the early Z diffs (fuji/subaru as are the later sklines) use M10 crownwheel bolts, i bought a used tomei r32 gtr centre off ebay a 2 way mech lsd.

one thing i found that the diff shop really wasnt keen on doing the swap, but aggreed to give it a look over.

after no response i went there paid 40$ for nothing and did the swap myself.

turns out the 32 gtr/r33 used an M13 bolt (yes M13???? go figure) so what i had to do was machine some bush's spacer @ 13.1 od 10.0 id x 11mm long for the 10 bolts.

as far as side/half shafts i had another circlip groove cut on the drivers side shaft to match the clip in the 32 centre, speced of the gear mesh and lash adj (happened to use the supplied shims that came with the centre and it was spot on lash wise)

from what youre saying it sounds as though you may have either 10mm ?? holes in your new centre yes you could just drill out to suit, but do so carefully.

after my install i was/am able to use the std 32/early 33 shafts (29 splines) they plug/play no problems, but i can still use the old uni joint hafshafts because i had the extra groove cut in.

i have done a pretty visual show of what i had done on vicZcar forum if you are interested

cheers nat0

that was a bit confusing but i get what you mean so yea i will just drill the holes bigger not problem

and with the sharfts i need 2 small ones as the stock ones, the other 1 is longer so i need two short ones then it will fit hopefully...

bubba Grand Master

bubba

Posted
Posted (edited)
no they will not. you need the matching nismo stub axles. thats if its a nismo one,

unless you have an open (non lsd) r200 where you have to swap the stub axels left to right

could be out of a early dr30. as far as im aware all the diffs hr31 onwards used 12mm bolts. exceps the silvias. and when you get a nismo diff it comes with spacers for the bolts. the opposite of your problem.

what was it out of?

Nismo diffs do not use "Nismo" stub axles, they use two standard ones (short).

R32 & S13 have the same bolt size (I know as I'm running S13 gears on my R32 Nismo 2-way centre).

My local diff guy was more than happy to set my diff up and I just swapped the housings.

Edited by bubba
T04GTR Grand Master

T04GTR

Posted
Posted

yes, the "nismo shafts" that are supplied when you buy the centre are standard evan though they are differnt lengths????? must be only the new ones that have 30 spline shafts.....

as with all the diffs its just a matter parts swapping till you get it correct.

Curmi Grand Master

Curmi

Posted
  • Author
Posted
My Nismo 2-way for 32gtst used two of the short shafts, they were genuine nissan items supplied in the kit.

yeah thats what i need..actuly only one small stock shaft then i can bolt this thing all on.

bubba Grand Master

bubba

Posted
Posted

If you don't know what you're doing then it's best to get a diff place to install the centre into housing and shim accordingly. (don't think you can re-use the pinion bearings but I may be wrong)

turboedsloth Grand Master

turboedsloth

Posted
Posted

i'd be getting a fresh set of bearings put in it if you've pulled it out an had it sitting where they can get shit in them. not worth the trouble of having to do it again as soon as you start driving it

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