Can You Shim A Factory Gtr Diff?

[Deano 1]

Hey all

just a quick question, can a r32 gtr factory rear diff be reshimed to be tightened up abit? Like the r200s in gtst's and 13's and so on?

The gtr diff is mechanical and the gtst and silivas are clutch diff.

Will it still work the same??

[jonn]

It sure can. Nismo has a kit available for it.

Try this link Clicky Click

[Ryno]

Apparently from factory only 4 of the 6 friction plates are oriented the correct way to grip.

Another way to tighten it up, is to swap the other two plates around so all 6 are doing the work.

[Duncan]

not only can you do the mechanical centres...they come up much better than the lsd centres.

i run a shimmed factory diff in my race car

I vcan't think of any reason to buy a mechanical 2 way centre for a gtr...what they have does the job perfectly. 1 or 1.5 way centres are better of course but that is a different discussion

[Deano 1]

How did you shim your diff Duncan, because they are not a a LSD type, can they still be done like this? http://datnet.org/Technical-f35/Tech-Artic...scous-t530.html useing the same shims? or do i need to buy Plates and diffrent type of shims for a diffrent spot?

thanks all

[Duncan]

sorry mate....anything with little gears that go round and round I give to someone to fix. So diffs are out of my abilities as are gearboxes and xfer cases.

this is what i did:

1. remove diff and take to diff shop

2. tell them "This diff is not tight enough, I want this to clunk when it goes around corners"

3. come back 2 days later and give them $400

4. put it back in car and love it.

so no idea of the exact shims, number, type or thickness. but the guys certainly knew what I was talking about and delivered exactly what I wanted.

[Deano 1]

Anyone ekes no if it's the same as the link above??

[Ryno]

Anyone ekes no if it's the same as the link above??

Like I said above... Swap the other two friction plates around. Won't cost you a cent (other than some more diff oil).

Nathan from O2 Autosports (on this forum as DRIFTER) as done exactly that on the GTR diff in his R32 drift car, and (with only that change) the diff is now tight enough to suit his drifting.

[Deano 1]

sounds so simple lol everything ive done so far on my gtr has been a pain nothing simple. haha

So theres 6 friction plates in a gtr diff, but only 4 are used, therfore the other 2 are in new condition? is that why it tightens it up?

just wanner get abit of info on how he did it, before i go pulling the diff out.

[NutR33]

I have used a Nismo shim kit (part no. 3843s-rs521) which is the tighter of the two in an R33 GTR dif in and R33 GTST and it is an awesome upgrade.

Before the shim kit it would spin the inner wheel when doing motorkanas and deca days, it would be very unpredictable and would lock and unlock mid corner.

With the diff shimmed up it is great on the street and the track. You can roll around a corner with it unlocked, so no clunking or skipping a wheel and as soon as you toch the go pedal it locks up nice and tight.

I have done 4 or 5 motorkana days after i did the diff and i have never had a problem with it unlocking.

The kit is fairly easy to install ( i did it myself) and comes with jap instruction which i got translated as there is a few measurement need to work out the correct amount of shims needed ( i have 1 spare one left over).

PS i tried turning the orginal nissan friction plates around before i put the diff into the car and this was still no good.

Cheers NutR33

[Deano 1]

where u get your kit from man? just buy it from Nissan? or from a import shop? i google couldnt really find any shops that stocked it, not even the jap shops

[Deano 1]

just bringing this thread back to life, diffs geting really bad now. so gunna get it rebuilt. i wanner use the Nismo kit... wheres the best place to get em??? and has anyone got the part Number for the tightest one they make?? i want it tight haha

[Duncan]

Hey dean get a diff shop to sort it out, it's not as easy as just throwing in a nismo or any other kit - there will be existing wear to take into account as well. the nismo kit is nothing special just some particular thickness clutch discs

[Deano 1]

Yer I mite just throw it up on my hoist and take the diff to a workshop, just gotta find a half decent one on the central coast.