R33 Gtst With R32 Gtr Rear Diff

[MJTru]

So like I said. I was preparing this car for the drag strip. So the first thing was to install the R32 Gtr rear diff. The gtr diff is a V lsd like most nissan so from what I heard on this site the R32 GTR from my findings is not a mechanical LSD and in comparison to a gtst4 unit the only difference is the gear ratio. Thats it.

So to move on we ordered a LSD for it from RHDjapan and as soon as it reaches we will install that which will work way better than the V-LSD. like I did on my r32 GTR project. Next what I learned was the wheel bearings are different the shafts wont go into the gtsts hubs. The diff bolts right up like it belongs there. So we wanted the biggers shafts. So we called it quits and going home and will get the gtr bearings and I have a good idea on how to make it work. The bearings from the gtr has a peace on the that makes the left and right. This peace is separate on the nissans like 240sx skyline gtst. But on the gtr I dont know why they did this. On the housing of the bearings them selves they made a peace for the e-brake pads to fit. But to make this work I have 2 options I change the back plate and use the gtrs or I just cut that peace off and bolt it to the existing unit on the car. Eather way it will work and when it does I will be able to run the bigger shaft.

Now this diff will kill acceleration but less my gear changes and I should do the quarter mile in 3rd gear in theory. As I do that in mt r33 gtr. May be different. But it will up my top end and lengthen the gears. I dont mind the acceleration loss. The car has a traction problem plus thats in my control how hard I launch it. Next is the coil overs. I found the perfect set. Look at the attached photo. Then its camber arms and toe arms. Then ill mock up maximum scwat having the springs out not going into the negative camber more than -1 degree off the line but starting out at + 1 or 2. Then ill use a bump stop to keep it at the flat 0 mark all the way down the track. Ill take video of the launch and study it. Look at the attached photos please.

Edited March 21, 2015 by MJTru

[GTSBoy]

Marcus, there's so many things wrong up there ^.

R32 GTR diff is not viscous. Is mechanical, just like normal R33 GTR. Same thing.

R32 GTR and manual R33 GTST have same diff ratio. 4.11:1.

GTR diff centres have larger splines for the stub axles. Hence they can only take the 6 bolt GTR stubs. Hence they only accept the GTR driveshafts.

GTRs have different alloy uprights to the 2WD cars. And the driveshafts don't play nice between them. The correct solution, if you're using GTR driveshafts, is to use GTR hubs. Complete. The whole thing. They still bolt up to the same suspension arms.

[MJTru]

Hmm. Im sure your wrong there. Even looking at the gts4 diff tags which I can take photos of.

Its states that the r33 gtst is a rc43 and the r32 gtr is a rc41 and tge gts4 is a rc43. I own these cars and I looked at them all. On the housing on the r32 gtr diff the original oem sticker is still there and it say viscous LSD. so for me thats good enough. But I could open one and see. So it its a mechanical LSD IN THE R32 gtr why does nissan stamp it with the viscous lsd sticker. ??? Im lost to that GTSBoy.

Edited March 21, 2015 by MJTru

[GTSBoy]

It's not a VLSD. I cannot explain why you have a diff housing from an R32 GTR that says it is VLSD, UNLESS it is the wrong centre in the wrong housing.

R32 GTR is simply not viscous.

[KiwiRS4T]

All GTRs have mechanical LSDs. None has a viscous LSD. BUT V-Spec models have a computer controlled LSD so if you can't tell from the outside by all means open it up and see what you have.

[MJTru]

There what you guys are saying. But I have 3 r32 gtrs in my yard as we speak. I looked at all of them and there all labeled with a orange sticker and on that sticker it clearly say viscous LSD. Thats 3 r32 gtrs that have these stickers. Im going to open one and take a closer look. And then report back.

[Duncan]

You're in the US, right? wasn't there some weird scam with all the GTRs that went into the country being rebadged fakes or something?

In any case, no matter how many of what you have in the yard, all 32 GTRs have 2 way mechanical diffs in them.

And if it helps, here's page CH-125 from the gtr workshop manual confirming it has a mechanical rear diff

[MJTru]

No no im not in the usa im close tho. But I just did a Google search and it is identifying the r32 as a mechanical LSD. which is weird. Cause the house aluminum part has a viscous LSD sticker. Could it just be a mistake on nissans part. The only way to verify is to take the cover off and look the the clutch disks. ???? This is interesting. As for the ratios im sure unless another mistake. The gtst and gts4 both have a rc43 and the gtr has a rc41 lsd gear ratio. I just verified that for the second time in my yard looking at all the ID tags the vehicles come wit. These im assuming cant be wrong.

[Duncan]

as for ratio, the same screenshot from the manual shows GTR is 4.111 (37/9).

r32 gts4 is closer to 4.4 (I don't have the exact teeth count handy), I have swapped one into my GTR it is definitely different.

I'm not sure what you have in those 3 cars, but they sure ain't normal.

[GTSBoy]

The only 4.3 diff ratio in 2WD Skylines is the one in auto tranny cars. The 4.3 in GTS4s is a slightly different and even shorter ratio (it's 4.375).

Look at page 3 of this document for a nice summary.

http://www.nismo.co.jp/en/products/competition/lsd/pdf/lsd_price.pdf

[MJTru]

Hmm. GTSBoy your right the car was originally an atuo converted to stick shift. But it still lines up with the ID tag of the car. Thanks for the document.

[MJTru]

We just finished the diff conversation. We used the r32 gtr wheel bearing and took the little tabs of the bearing hubs. So that we will never have a ebrake shoe issue. (Left or right). Wow. This was a very easy conversation. Thanks everyone for the information about diffs. We will drive the car today and see the difference. The mechanical diff will have to work untill or new unit reaches from RHDjapan.

From tge little I see. Some bonuses are the r32 diff has cooling fins. Next it looks way stronger shafts and all.

Is there a thread on here to rebuild or tighten up the clutches in the r32 rear diff. Im just curious. My mate said he will order the drag coil overs then we will work on chassis weight transfer at launch.

[KiwiRS4T]

Here is a video on adjusting (and possibly shimming) your diff (turn down the distracting music!)

https://www.youtube.com/watch?v=ZuMLnWHRs5Y

[MJTru]

Thanks mate. The vidoe was very informative. Im good at dealing with diffs and thats very straight forward. Guess I cant argue with you now GTSBoy. lol. Thanks for all the help. The mechanical diff should really be better than a v lsd. ;)

[Blackkers]

marcus Check this out;

http://www.rhdjapan.com/nismo-r200-mechanical-lsd-disc-kit-rs521.html

some people have talked about success with a rebuilt R32 GTR 2 way. You can tighten it up a whole lot with this kit

[MJTru]

Thanks mate. Today we race against ourselves. Cause the other guys didn't even show up. So we challenged ourselves and man did this mod make a difference. Like night and day. I cant wait to work on the suspension geometry next. Hope my mate has the cash for the suspension modes. Cause he is having posting problems on this site. Take that rickypr33. Kml:D:lol::lol: