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R180 4.4 Ratio Lsd, Crown And Pinion. (Or Similar)


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#1 MyEnquiringMind

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Posted 20 September 2015 - 03:08 PM

Hi Folks,

 

I am looking for either the GC8 WRX R180 4.4:1 LSD, or a long nose R180 crown and pinion gear set with the 115mm inside diameter (out of a K box) with a similar ratio. I am currently running a 4.1 and looking to go a little shorter ratio, so will consider 4.4 or 4.6 if someone has a diff/crown and pinion available.

 

Cheers, Jarrod.



#2 d3c0y

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Posted 20 September 2015 - 07:42 PM

That diff ratio is out of a very specific model GC8 - STi version 6 Type RA in case you didnt know.



#3 MyEnquiringMind

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Posted 20 September 2015 - 09:14 PM

Thanks d3c0y...

#4 d3c0y

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Posted 21 September 2015 - 09:40 AM

Not sure if that is a sarcastic thanks or not. I just know because this is the diff i have in my car. Don't forget to get a new speedo pinion.



#5 MyEnquiringMind

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Posted 21 September 2015 - 03:35 PM

not a sarcastic thanks buddy, I am genuinely keen to find one of these and appreciate the response... and also the comment Re: change of speedo pinion, I have previously tried Courtesy Nissan in the states, but no luck... do you know where I could find a speedo pinion d3c0y?



#6 gav240z

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Posted 21 September 2015 - 03:51 PM

I just know because this is the diff i have in my car. Don't forget to get a new speedo pinion.

 

I seem to recall a discussions on this conversion. Is there a thread that details what's involved to make it work in an S30z?



#7 d3c0y

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Posted 21 September 2015 - 11:04 PM

not a sarcastic thanks buddy, I am genuinely keen to find one of these and appreciate the response... and also the comment Re: change of speedo pinion, I have previously tried Courtesy Nissan in the states, but no luck... do you know where I could find a speedo pinion d3c0y?

 

I got mine from Chesapeake Nissan. They have a great list of parts on eBay and you can just message them direct with specific requests. It's the the purple one fwiw.



#8 MyEnquiringMind

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Posted 22 September 2015 - 03:02 PM

Thanks D3c0y...

#9 d3c0y

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Posted 23 September 2015 - 09:32 PM

No probs



#10 Roberto

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Posted 25 September 2015 - 02:51 PM

In the USA:

http://www.ebay.com/...f25762c&vxp=mtr

Or if you prefer the UK:

http://www.ebay.com/...4be11b2&vxp=mtr

I would consider your 4.1 LSD if you choose to sell it.

#11 d3c0y

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Posted 25 September 2015 - 05:13 PM

Buying them in Japan is waayyyyyy cheaper.



#12 Cozza

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Posted 25 September 2015 - 08:23 PM

G'day Jarrod
Do you plan on running the beta Motorsport side axles, which suit the Subi diff?
I have a 4.6:1 ratio diff which I got from the front end of a 720 4x4. It is a "K" housing and needed a slight amount of massaging inside the case to fit a Subi LSD centre. Also had to make up some shims to cater for 11mm bolts in 12mm holes.
Might be a cheaper option?

Gav, here's a thread on the Subi diff although mostly discussing cv options.
http://www.viczcar.c...-lsd-into-240z/

Cheers
Mick

#13 MyEnquiringMind

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Posted 26 September 2015 - 12:00 AM

Hi Mick,

 

yeah I already have the axels, I picked them up from a bloke David from Gympie.

 

http://www.gumtree.c...haft/1084823021

 

I have already got a 4.8 Datsun diff (Quaife LSD) in the shed at home, but in the early stages of this build, I was going to try and find something a bit more streetable, i.e. 4.1 or 4.4 and see what that was like...

 

Thanks for taking the time to reply...

 

Cheers, J

 

P.S. after pulling the rear cover off, I am now aware that the R180 in situ is in fact a 3.5 and not a 3.9 or 4.1 as expected... so i'll be happy to take a 4.1 if anyone has one spare... (oops...)


Edited by MyEnquiringMind, 26 September 2015 - 04:30 AM.


#14 MyEnquiringMind

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Posted 26 September 2015 - 04:38 AM

In the USA:

http://www.ebay.com/...f25762c&vxp=mtr

Or if you prefer the UK:

http://www.ebay.com/...4be11b2&vxp=mtr

I would consider your 4.1 LSD if you choose to sell it.

Thanks Roberto, unfortunately my current diff is niether LSD, nor 4.1... (read above).. nor am I feeling that rich... looks like I might have to get Craig Ford to go on the hunt for me...



#15 Cozza

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Posted 26 September 2015 - 08:44 AM

Cool
I have a 3.9 as well as the 4.6. The 3.9 is a good street application (especially if you do significant highway driving) and the 4.6 is great for the shorter tracks like Wakefield or the Amaroo circuit at SMSP.
I imagine the 4.1 would be a good compromise and make your car a lot more spritely over the 3.5.

I'm sure the rally boys would be interested in the 4.8 LSD.

Good luck with it
Mick

#16 dat2kman

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Posted 26 September 2015 - 08:53 AM

4.6 and 4.8's are common, in utes.
The Nissan R180 in 4.375 was a Nsmo Competition part,,and rather rare, even 30 years ago.
The higher number of pinion teeth give it better reliability compared to 4.6-5.1's

Yes, easier to source a Subaru version, ex Japan, then change the stubs. Check with SWM he was getting a better quality stub made, as, in severe use ( rally/circuit) SWM found the Beta stubs were failing.

#17 Gareth. J.

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Posted 26 September 2015 - 08:54 AM

I was looking at those axels too, they seem to be well made!

Yeah Jason, there's been a few issues with those billet 'wolf creek/beta axels recently on Hybridz.

If you can spare the coin, get the gear set isotropic finished. I did mine and it's the most quiet diff I've ever heard.

Edited by Gareth. J., 26 September 2015 - 08:57 AM.


#18 Gareth. J.

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Posted 26 September 2015 - 08:59 AM

How strong are the Subaru R160 LSD's? For a road car it could be ok...

On Hybridz there's guys running LS1's with Subi R180's and they break the billet axels not the diff.

#19 dat2kman

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Posted 26 September 2015 - 10:11 AM

Yep, the "billet" axles aint as good as original factory ones,,,,,

#20 Mike260LW

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Posted 26 September 2015 - 11:03 AM

Yep, I have just done one of these conversions. The Subaru R180 diffs come up on eBay periodically from Jap parts importers. The ratio is 4.444 to 1 and they come in either a clutch pack or Torsen style torque sensing LSD. The later are more prevelant but in my opinion less desirable. They come up for around $600. The SWR axles are fine but you need R200 half shafts. The 4.4 ratio is a good all rounder




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