Shimming A R33 Diff

[woolls]

Went to Nissan today to get a shim to tighten my diff but was not sure what shim or shims to get. Looks like there is 3. have attached picture.

thanks

Leigh

Edited April 24, 2006 by woolls

[GTS20X]

Going by that picture its Viscous LSD which cannot be shimmed.

Carlos

[SKYL9]

Going by that picture its Viscous LSD which cannot be shimmed.

Carlos

iv asked a couple of diff palces and they've said 33's cant be locked up like the s13s by shimming..

is there a cheap way of locking up 33diffs or is the only option replacing it?

[GTS20X]

If you have a viscous LSD you will need to replace it with a mechanical LSD.

[Cubes]

The viscous CAN be shimmed, its not really the best option but does work long enough for you to get some $$ together for a 'real' diff.

Essentially the only difference between the S13 and R32/R33 diff is the ratio, back plate and half shafts (different bolt up). The housing and diff center are the same.

[siksII]

a bit off topic but i was wondering about if was able to get an s15 helical diff is it possible to fit the centre in and r33 diff? or change the whole diff?

[Cubes]

The S15 helical is good for handling and getting power to the ground HOWEVER they are a little weak and break up around 200rwkw.

[GTS20X]

The viscous CAN be shimmed, its not really the best option but does work long enough for you to get some $$ together for a 'real' diff

Yeah done that before on a standard diff to get a cheapo lsd effect. Can wear out the internals of the diff very quickly though.

Carlos

[woolls]

thanks for the replys,

looking at the pic, what shim is it i would need to get, part 38453 x2 or part 38454 which there is only 1 of. nissan quoted me 35 bucks each for part 38453 and they come in different thicknesses.

thanks

again

[siksII]

The S15 helical is good for handling and getting power to the ground HOWEVER they are a little weak and break up around 200rwkw.

Yeah a knew that already i have a good friend who has an s15 and i love the way his diff works. I have seen one for sale cheap recently, and my original question was can i fit it on my r33 gts-t???? if i can for cheap it would be a good handling upgrade.

[BHDave]

Yeah a knew that already i have a good friend who has an s15 and i love the way his diff works. I have seen one for sale cheap recently, and my original question was can i fit it on my r33 gts-t???? if i can for cheap it would be a good handling upgrade.

I have been reliably informed that it will fit the housing but the splines on the out put shafts are different to all the other vlsd diffs so you have to use the s15 ones. I have seen it done in a couple of s13's.

What that means for skyline owners is that you will also need to swap driveshafts. In an r32 not so much of an issue as s13 6 bolts shafts will fit.

The extra cost of the shafts and the reduced drive shaft diameter may be an issue. Thats what's put me off that idea.

[7yphon]

ok I dont know if the dif is the same as the R32 but I would asume the shim used would be pritty close this is what im going to use for mine and heaps of ppl use for drift, "and yes its off a 300zx" in case the nissan guys ask lol

part number: 38424-40F68

description: WASHER-THRUST, SIDE G

unit price: $15.78

[Cubes]

That is so tempting to get just a little more life out of my diff.

7yphon, as your in the circle, how would this shim help an almost completely stuffed vlsd diff?

As a rough description of its condition it will spin one wheel through first and some times twin up second in a straight line without any nasty clutch dumps/gear slaps. All though clutch dumps/gear slaps do tend to have it twin up more often than throttle roll ons.

Hot 35+degree weather after driving on it for a while has the diff locking up almost perfectly.

[woolls]

ok I dont know if the dif is the same as the R32 but I would asume the shim used would be pritty close this is what im going to use for mine and heaps of ppl use for drift, "and yes its off a 300zx" in case the nissan guys ask lol

part number: 38424-40F68

description: WASHER-THRUST, SIDE G

unit price: $15.78

thank mate

[7yphon]

From what I heard the cluch pack or whatever gets a little sloppy the older is gets. The shim is surpose to go onto the old shim to put it near stock or even further. I am not really too sure about stuffed ones but what you said sound like you might have another issue, BTW Woolls this is only a temp thing because they need to be replaced I would suggest shimming it and then saving up some dosh for a decent 2 way

[Cubes]

The R32 and R33 GTST's run a Viscous LSD.. They don't run clutch packs.

Viscous works on the principle of one wheel spinning heats up the viscous fluid that expands and locks the two wheels together. As they age they begin to open wheel. Why shimming works on these diff's i'm am not completely sure, but it does. To some extent.

Have a read of the LSD wiki to so you understand a little more about diffs.

http://en.wikipedia.org/wiki/Limited_slip_differential

[woolls]

From what I heard the cluch pack or whatever gets a little sloppy the older is gets. The shim is surpose to go onto the old shim to put it near stock or even further. I am not really too sure about stuffed ones but what you said sound like you might have another issue, BTW Woolls this is only a temp thing because they need to be replaced I would suggest shimming it and then saving up some dosh for a decent 2 way

thanks again,

not going to muck about with shimming the diff now, i ordered a new kaaz 1.5. should be here this friday

Edited May 3, 2006 by woolls

[Memph]

thanks again,

not going to muck about with shimming the diff now, i ordered a new kaaz 1.5. should be here this friday

Hmm.

How much did that cost you and where did you order it from?

I was thinking of shimming mine (r32) but after reading this thread im not overly sure its the right thing to do.

[woolls]

Hmm.

How much did that cost you and where did you order it from?

I was thinking of shimming mine (r32) but after reading this thread im not overly sure its the right thing to do.

about $1200 delivered. send RMS an email for a price. here is a link

http://www.rmsmotorparts.net/HomeFrameset.htm

cheers

Leigh