Dead Diff

[R31Nismoid]

As i suspected... the night i blew my turbo... i did my diff as well.

Didnt get to test it out till tonight (but at least the car goes well in general)

So, for an R31... with the R200 (think its a long nose)

What goes into it easily, and is tougher than what i had.

As i've never heard of an R31 Coupe blowing it's diff... but this one has.

And now im goin to have a fair whack more power too so i dont wanna be frying them every 6 months.

Would a 1.5 way LSD (whatever they are called) for an R32/R33 fit into the R31 diff?

Dont wanna go buying something and not have it fit!

- ash

[R31Nismoid]

So no-one knows?

Even an S13 centre or something?

... i didnt realise how much my LSD played in my driving

[V8skylineMAN]

dunno what else came out with r200...300zx did(lsd)...MAYBE s13(not sure) the 720 4wd's had a r180 with heavy duty crown and pinion(not lsd), i dunno if it was as strong as an r200 tho...

[fatz]

s13 centre will fit

but the centre might be fine it might be the input and replacent 31 diffs cost$$$$

[R31Nismoid]

s13 centre will fit

but the centre might be fine it might be the input and replacent 31 diffs cost$$$$

what you mean Pete?

I dont understand :blah:

The input/replacent?

[V8skylineMAN]

He means that it could be the input shaft(pinion) of the diff that is shot...in which case you would need a replacement R31 diff, which is expensive.

[predator]

Well I'd speak to some diff specialists, they might be able to build you whatever you want in your old casing and just give you new crown and pinion gears. Otherwise I guess you're going to have to swap the whole diff over for something else.

Just gotta weigh up the costs which is the cheapest.

[R31Nismoid]

The whole diff replaced? Or just the input shaft...

Either way... talking to 'experts' i've found to be a pain in the arse.

No-one knows when it comes to an R31.

That's a tried and proven thing.

As i can see it now... i'm gonna have to spend 'X' amount to have someone look at it, and then tell me they dont even know. Put it back together... and then leave me none the wiser and $400 in the red

[V8skylineMAN]

whole thing.....i dont think any wrecker would strip a diff for u

[R31Nismoid]

HOLY SHITE!

End to end... the whole diff... FARK ME DEAD!

No way i'll ever find on if that's the case.

HHmmm... this is looking worse and worse

[Steve]

is R33 R200? I thought it was. Is the R31 diff IRS? will the R33 diff (between the driveshafts and tail shaft) bolt in place?

[R31Nismoid]

Hmm.. the R31 is R200.

And it is IRS, albeit a tad different to an R33 IRS.. but IRS all the same.

Not Live like the Aust Delivered models.

I dunno about fitment though.

Do you know pete?

You've done a bit of playing around im sure

[KamikazeR33]

if a r33 dif is a r200, it "should" bolt up, if not, a little custom work should make it fit

in this case, im sure u could pick up a good 2nd hand 1.5 or 2 way lsd cheaply

[R31Nismoid]

Hhmm... upon extensive testing tonight.

Sometimes it's LSD... very rarely.

But sometimes it kicks in for a while.

So that probably isnt the input shaft yeah? As it would be making lots of noise too?

[VIPERGTSR01]

if its just the LSD giving you problems (and the teeth aint busted up) just get the diff rebuilt

[fatz]

yea what v8skyline man said

the 31 is r200

the 33 dont know

the input pinion is know to give up onthe old 31 diffs... mine is a bit shagged

i replaced the centre of my diff with a 2 way cusco diff centre that i removed form my s13 silvia which is the same. drive shafts are the same but the r31 ones are longer i had to machine mine down to fit... which i guess would make them weaker

spose ill find out when i try and drift fourth or something stupid

im sure you could replace the imput if thats the problem becasue a whole new r31 housing ect cost 600 used

if its just the centre youc an get it tightened for 350 and or replaced for about 500 with a used centre( locker)

pete

[R31Nismoid]

the input pinion is know to give up onthe old 31 diffs... mine is a bit shagged

Thanks pete!

What about getting another pinion made up? Or even a stonger one?

Or is that just not cost effective... as Import 31 diffs are hard enough to come by as it is... and that means they are going to cost more and more.

Also, i was talking to chris the other day...

I need an Import Diff Bush, do you know what it is, what it looks like???

Chris said i could have one out of the car he is wreckin... but he has no idea what one looks like (neither do i) I cant get pics of it for a few weeks yet to send to him.

Mine is totally knackered and the diff moves around something chronic, probably had some part in the diff playing up.

But the S13 fits... so if all goes to plan i'll be getting a 2 way out of an S13 that is coming over.

Thanks for the help so far guys. I thought it was going to set me back thousands :flower:

[GTS20X]

Sounds like your LSD is worn, you can rebuild it. The HR31 LSD is a 2-way, i rebuilt my LSD, found a couple of broken plates replaced them and was able to add a few more after removing some spacers, now it works awsome.

Carlos

[R31Nismoid]

They are 2-way's from the factory?

[GTS20X]

Yep, there let down by not enough plates and not enough preload.