R33 GTR diff into S14

[Nismo32]

Hi all

I was think of changing my S14 diff to a non V-spec R33 GTR diff. Similar to S15 i think but with shorter final drive.

Can any1 shed any light on wheather this is a straight swap or there is a lot of custom work need??? Any1 else done this??

What about non V-spec R34 GTR??

Cheers

[Laurence]

Well the R33 is a 4.111 which would be good, the R34 has a 3.545 so you probably wouldn't really want to use that. The non-V-Spec diff is pretty tight, only stock diff I have ever heard skipping the tyres when you are parking. Very noice.

In one of the early issues of Speed magazine there is a S14 with an R33 GT-R diff in it and they seemed to think it went in fairly easily.

[Nismo32]

Ok thanks Gojira. Ill have to check out my speed magazines. What do these Diff's usually go for anyways?

Cheers

[Gav]

I saw an S14 in Perth that had a GTR diff fitted. The workshop claimed that it was a straight forward conversion.

I picked up a spare complete rear GTR diff for $800. This seems a pretty typical price.

[GTR-Ben]

I would be interested in knowing what they do to fit them as the splines would be different from the diff and into the hubs?

[Nismo32]

Is there any workshop in Vic that would know. A lot of them dont have much to say. Im gonna do this or get a nismo 1.5 way, but im not sure yet. If the GTR diff will fit i might get one. Thanks 4 ur help.

Cheers

[ido09s]

We put a 32 GTR diff, driveshafts, hubs and brakes on a S14 cause we bought a rear cradle dirt cheap. Don't know how easy it would be without the driveshafts etc as the GTR items are quite chunky compared to the stock S14 items.

[GTR-Ben]

We put a 32 GTR diff, driveshafts, hubs and brakes on a S14 cause we bought a rear cradle dirt cheap. Don't know how easy it would be without the driveshafts etc as the GTR items are quite chunky compared to the stock S14 items.

Yes and then you need to use GTR rear suspension.. hassle

[ido09s]

Yes and then you need to use GTR rear suspension.. hassle

not at all.... the car still uses the S14a rear cradle. Sure, it required 2 mounts be put on the cradle to suit the GTR diff, but apart form that it all bolted straight in

[GTR-Ben]

So you bolted the GTR hub into the S14 carrier?

I have GTS-T gear in the rear of my S13. I want to install R32 GTR internals into the diff housing and install it. If it's possible..

[ido09s]

thats corect..... we bought a complete rear, but left the cradle and arms out of the swap...

[Nismo32]

so i have come to understand u need the GTR driveshafts aswell as the diff. Are the diff housings different or the same?? It would be easier to use the whole housing, but i suppose u could just use the centre.

Cheers

[ido09s]

if your wanting to swap the entire diff over, housing and all, you will need the drive shafts and rear hubs as the spline on the GTR drive shaft is slightly different to that of the S14 hub..... you will also need to ad some mounting points from the GTR cradle to the S14 cradle.

[GTR-Ben]

Got any pics of adding on these mount points?

I'm guessing the Nose front the S14 diff will not fit the GTR diff?

[ido09s]

Will see what i can do.... the car needs a service and will more than likely be on the hoist tomorrow

[Nismo32]

Cheers ido09s any pictures will be great.

[GTRgeoff]

Just to add to this thread with Some R33 info. I spoke to a workshop that has tried and the R33GTR Diff will not fit the R33 GTS25t due to the tailshaft flange being different. It wasn't clear if the mountings for the diff were different but at the least a tailshaft mod would be required.

[GTR-Ben]

Tailshafts can be chopped and changed, thats easy . More worried about the side shafts etc?

[GTRgeoff]

Too true, but for the cost of buying all of those, a mechanical will be easier and cheaper. Best quote so far is $700.

[ido09s]

sorry mate, no pics as the car didnt make the hoist..... i did nelgect to mention that the tail shaft will definitely need to be modded as the GTR has a CV joint assembly as the rear universal joint, not a cross yolk like the GTST....