S12 LSD conversion with S14 bits query
 

sorry to sound like a douchebag but i've found sum1 local who's breaking an S14 & will let the rear diff & drive shafts go for £90

this has been briefly discussed in other threads but can any1 please give me an idiot guide to exaxtly what i have to do to make this work

:trout

Much easier to buy an lsd thats made for a 200sx with open diff.Then it's just a bolt in setup.

Are your sure about this? :rolleyes:
You mean LSD for an open diff R200 for 200sx s13 or s14 it's a bolt on on our R200? Never found some who made it (despite of the flange, the specs of axles).
I just want to trust you seems too good to be true.

Have a look at my build thread,I've got an OBX 200sx lsd and it was bolt in;)

here?

http://www.nissansilvia.co.uk/vbb/sh...?t=2911&page=7

You're best to get an LSD for an open S13 diff

i thought s13 & s14 diffs were pretty much the same?

Yeah but I think the S14a has a thicker shaft (the splined part that goes in the diff unit)

do you think it'll be wise for me to get a spare s12 diff to try this with, don't wanna pull mine apart & be stuck

Yeah I would. At the end of the day if you buy a diff that is designed to be installed in an S13 case that uses the S13 open type shafts you are likely to be fine

ok, so will a diff from any manual s13 do the job?

No you need an old S12 diff. It's the S13 internals that you put in the S12 case

No,you need to get an lsd for an open diff s13.One thats designed to fit an s13 with vlsd will not fit .

http://www.nissansilvia.co.uk/vbb/at...2&d=1236110988

this is the picture of my lsd fitted into my diff casing.

Is this the type that will bolt straight in ?

http://cgi.ebay.com/ebaymotors/OBX-H...#ht_2484wt_732

Yes,that is the diff I have in my car
You need to get the bearings that go on either side of it as well.

LSD
http://cgi.ebay.co.uk/Nissan-200SX-S...item4aa0b3eced

NON-LSD
http://cgi.ebay.co.uk/Nissan-200sx-S...item3ef9fbfb2d

How do you visually check to see if its LSD or Not????????????

Where did you get the bearings from? I'll be doing this as long as I can get all the bits together :)

rhdjapan.com as far as I can remember,much cheaper than the main dealers:D

I've looked on there but can't find any bearings sold separately??

If you email them then they will get them for you.
I've seen them on ebay before as well.

is this the diff you've got ?
http://cgi.ebay.com/ebaymotors/OBX-H...item2a0b294c41


Was it easy to install ? What about shimming it? And the last Q is I see you've used the standard shafts, were they a straight fit in this LSD?

you need 2xs12 short shafts, (passenger side), then shorten 1 of them by 8mm by grinding the end and deepen the grove on it so that the snap ring fits, then the other shaft, you take the splined end off and fit the flanged end on off of an s13 shaft, then you use the pot joint out of the s13 diff into the s12 diff, which mates up to the flange on the shaft.

Thanks matey, I've been looking at the original thread. I've now started looking for a diff

http://nissansilvia.co.uk/vbb/showth...highlight=diff

Yes thats the diff I have,I measured the lash on the original diff before I took it out and then checked it was the same once I had fitted the obx 1.

It's designed for an s13 with open diff so the original shafts fit straight in.

It's a straight copy of a Quaiffe lsd.

I've read that you need to replace the belleville springs in the obx cos they are crap but I've had no problems with mine and I'm running more than 300bhp.
I like it as a road use lsd as you really won't notice it's there unless you are giving it the loud pedal.

So are you running both original S12 shafts with this diff? Or the two short S12 shafts?

They'd be the original shafts

I thought I'd best check before I start thinking of raiding the piggy bank ;)

Me 2! Must admit that it would be easier just buying the OBX and some side bearings and then dropping it in.
Only problem is do I replace the other pinion bearings to make sure they dont give up once on the road. This would mean a whole load of hassle according to the Manual.
In the meantime I have sent an email to RHDJAPAN.com to enquire on the prices of the bearings

I suppose that's the better option if I'm not keen on machining shafts 'n' what not, as per Shaun's post ? That sounds like too much work and too likely for something to be done wrong lol...

Machining it is easy you can do it by hand with an angle grinder and you have the S13 shaft to see exactly what you're aiming for.

Northerner - I wouldn't bother doing any of the bearings, just use all the original bearings and shims in their original places and then use some engineers blue to understand what needs adjusting if at all.

Well the one in my car may need new bearings. I have a spare and the defo needs them.
Found this lovely item whilst surfing ....

http://www.datsport.com/R200_diff.html

Also found this diff which comes as a straight swop


http://www.precisiongear.com/powerbrute.htm

Found this for a Z31 lsd transplant which covers the different type of shafts that can be used ....


http://www.88hybrid.com/forum/viewto...18379f5c2311a2

This looks like it would fit ? ideas

http://cgi.ebay.co.uk/JDM-Cusco-1way...item2a0b8b81ec

It's a 1 way locking clutch type lsd and it might well be worn out.
For that price I would steer clear tbh.
A helical would in my opinion be much better for road use.