Jump to content
SAU Community

R32 & R33 Gtst Diffs

Russman
 Share

Recommended Posts

Russman Grand Master

Russman

Posted
Posted

Hi everyone.

I remember hearing that R32 and R33 GTSt diffs are the same except for the back plate to allow for a different hicas rack.

Is this correct?

Reason is that there aren't many 2nd hand diffs for an R32 and I have a backing plate from an R32.

I'm after a stocky to put a 1.5 way centre into it.

thanks,

Russ

Link to comment
https://www.sau.com.au/forums/topic/192019-r32-r33-gtst-diffs/
Share on other sites
bubba Grand Master

bubba

Posted
Posted

I've been chasing the same for the same reason.. also to go to 4.1 ratios. I have been informed that the crown wheel bolt pattern is different, if you find out otherwise, let me know :)

It you haven't bought the diff yet, I think you could just buy an 1.5way suited to a 33 maybe.

Russman Grand Master

Russman

Posted
  • Author
Posted
I've been chasing the same for the same reason.. also to go to 4.1 ratios. I have been informed that the crown wheel bolt pattern is different, if you find out otherwise, let me know :P

It you haven't bought the diff yet, I think you could just buy an 1.5way suited to a 33 maybe.

Nah I want to start with a new diff I know all about unless if one comes up cheap enough.

Surely somebody knows?

BHDave Grand Master

BHDave

Posted
Posted

the backing plate is different.

The front mounts are different. you need to machine up a bush and press it in.

The crown wheel bolt pattern is the same. This one is actually a bit of a myth as there are actually different bolt diameters in the r200 centers but i'm pretty certain that the r32 and 33 ones are the same size as r32 actually has the larger size bolts. Doesn't matter really as there are converter bolts available from nismo that have a larger shank to suit the larger hole in the center and a smaller thread to suit a smaller crown wheel bolt size as used in s13 ratios (3.9's). pretty certain i have some floating around somewhere....

Russman Grand Master

Russman

Posted
  • Author
Posted
the backing plate is different.

The front mounts are different. you need to machine up a bush and press it in.

The crown wheel bolt pattern is the same. This one is actually a bit of a myth as there are actually different bolt diameters in the r200 centers but i'm pretty certain that the r32 and 33 ones are the same size as r32 actually has the larger size bolts. Doesn't matter really as there are converter bolts available from nismo that have a larger shank to suit the larger hole in the center and a smaller thread to suit a smaller crown wheel bolt size as used in s13 ratios (3.9's). pretty certain i have some floating around somewhere....

Thanks mate. Same ratios too?

BHDave Grand Master

BHDave

Posted
Posted

nah, s14 ~3.7 from memory, s13 ~ 3.9, r33gtst ~ 4.1 and r32gtst ~ 4.3.

very roughly. A bit of research can confirm the exact ratios available. there are a few ratios in between and i think the r32gts4 is close to 4.4

bubba Grand Master

bubba

Posted
Posted

Hmm so I should be able to bolt an R33 crownwheel to my R32 Nismo diff? just need to utilise converter bolts with a thicker shank?

I have been given so much conflicting information over this! I want to drop the ratios a bit as 4.3's with the RB30 is a bit too short.

BHDave Grand Master

BHDave

Posted
Posted
Hmm so I should be able to bolt an R33 crownwheel to my R32 Nismo diff? just need to utilise converter bolts with a thicker shank?

Thats worst case. You'd need to confirm the bolt size on the crown wheel once you have the diff open.

bubba Grand Master

bubba

Posted
Posted

Ahh OK, so if I grab myself a 33 diff it should all bolt up I just MAY need some converter bolts?

By the sounds of what I was previously told, it wasn't going to work at all and I needed to stick to S13/R32 diffs.

  • 2 weeks later...
Russman Grand Master

Russman

Posted
  • Author
Posted
so... in theory... i could also buy an r33 diff to bolt up into my 32 for lower cruising revs...

I am sitting on 3100 rmp at 100 clicks...this seem far to high?

Yeah but it's only 5% difference. So 2945 rpm instead of 3100. If you do, sell me your R32 diff.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • dbm7
      R34 Skyline climate control unit transistor

      By dbm7 · Posted

      Bit of a pity we don't have good images of the back/front of the PCB ~ that said, I found a YT vid of a teardown to replace dicky clock switches, and got enough of a glimpse to realize this PCB is the front-end to a connected to what I'll call PCBA, and as such this is all digital on this PCB..ergo, battery voltage probably doesn't make an appearance here ; that is, I'd expect them to do something on PCBA wrt power conditioning for the adjustment/display/switch PCB.... ....given what's transpired..ie; some permutation of 12vdc on a 5vdc with or without correct polarity...would explain why the zener said "no" and exploded. The transistor Q5 (M33) is likely to be a digital switching transistor...that is, package has builtin bias resistors to ensure it saturates as soon as base threshold voltage is reached (minimal rise/fall time)....and wrt the question 'what else could've fried?' ....well, I know there's an MCU on this board (display, I/O at a guess), and you hope they isolated it from this scenario...I got my crayons out, it looks a bit like this...   ...not a lot to see, or rather, everything you'd like to see disappears down a via to the other side...base drive for the transistor comes from somewhere else, what this transistor is switching is somewhere else...but the zener circuit is exclusive to all this ~ it's providing a set voltage (current limited by the 1K3 resistor R19)...and disappears somewhere else down the via I marked V out ; if the errant voltage 'jumped' the diode in the millisecond before it exploded, whatever that V out via feeds may have seen a spike... ....I'll just imagine that Q5 was switched off at the time, thus no damage should've been done....but whatever that zener feeds has to be checked... HTH
    • 25RBGT
      Got this r31 silhouette flood car to rebuild.

      By 25RBGT · Posted

      First time we have seen lights 
    • Wazmond
      WGNC34 - floor mats

      By Wazmond · Posted

      I think Fitmit had some, have a look on there (theyre Australian as well)
    • soviet_merlin
      Howdy Y'all

      By soviet_merlin · Posted

      Hah, fair enough! But if you learn with this one you can drive any other OEM manual. No modern luxury features like auto rev-matching or hillstart assist to give you a false sense of confidence. And a heavy car with not that much torque so it stalls easily. 
    • soviet_merlin
      WGNC34 - floor mats

      By soviet_merlin · Posted

      Actually, I'd say all three are the automatic option. Just the different trim levels. The manual would be RSFS, no? 
×
×
  • Create New...