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

    • The Bogan
      NC MX5

      By The Bogan · Posted

      Version 1 aluminium airbox is.......not acceptable No pics as I "didn't like the look.....alot" Even after all my "CAD", and measurements, the leg near the fusebox just didn't sit right as it ended up about 10mm long and made the angle of the dangle look wrong, the height was a little short as well, meh, I wasn't that confident that Version 1 was going to be an instant winner I might give Version 2 another go, there's plenty of aluminium at work, but, after having in on and off a few times, and laying in the old OEM airbox without the new pod filter and MAF, there may be an option to modify the OEM air box and still use the Autoexe front cover and filter.... maybe This >  Needs to fit in here, but using the panel, and not the pod, the MAF will need to fit in the airbox though> I'm thinking as the old OEM box and Autoexe cover that is sitting in the shed is just sitting around doing nothing, and they are relatively abundant and cheap to replace if I mess it up and need another, it may well fit with some modifications to how the Autoexe brackets mounts to the rad support, and some dremiling to move it get in there, should give me some more room for activities, as I don't want to move the MAF and affect the tune Sealing the hole it requires to stick it in the air box is simple, a tight fit and some pinch weld will seal it up tight  I am calling this a later problem though
    • Dose Pipe Sutututu
      Ethanol Content Sensor - Always at 11%?

      By Dose Pipe Sutututu · Posted

      and it ends up being already priced in as though you're just on 91RON without any ethanol. Car will lose a bit of economy as the short and long term fuel trims bring down the AFR back to stoich or whatever it is for cruise/idle for the engine.  
    • soviet_merlin
      Ethanol Content Sensor - Always at 11%?

      By soviet_merlin · Posted

      Oh, you are right. But, in Australia E10 is based on 91RON fuel and ends up being 94RON. Hence it being the cheaper option for economy cars. The more performance oriented cars go for the 98RON fuel that has no ethanol mixed in. The only step up we have left then at some petrol stations is E85.
    • niZmO_Man
      Lock up the old for sale / wtb threads.

      By niZmO_Man · Posted

      There is a warning that "this thread is super old" but they ignore that anyway...
    • TurboTapin
      Ethanol Content Sensor - Always at 11%?

      By TurboTapin · Posted

      With 10% Ethanol, we're talking 2-3% fuel consumption difference. The emissions reductions and octane boost in my opinion far outweigh this almost non existent loss.    My tanks sitting at 80%. Luckily that should go down fast as I'm on vacation again for the next two weeks. 
×
×
  • Create New...