Jump to content


Photo

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


  • Please log in to reply
28 replies to this topic

#21 Cozza

Cozza

    Senior Member

  • Members
  • PipPipPipPipPip
  • 967 posts
  • Location:Sydney
  • Tagline:Datsun obsessed

Posted 26 September 2015 - 10:43 PM

The SWR axles are fine but you need R200 half shafts. The 4.4 ratio is a good all rounder


What's the difference between the R180 & R200 half shafts?
I didn't know SWR was making the stub axles but no doubt they will be a top notch product as usual.

Cheers
Mick

#22 d3c0y

d3c0y

    The 2000+ club

  • Members
  • PipPipPipPipPipPipPip
  • 2,909 posts
  • Website:http://garagesanmaru.com
  • Location:Brisbane
  • Tagline:Forum Jerk

Posted 27 September 2015 - 11:55 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

 

They aren't all the same ratio. The Suretrak torque sensing diff is the most common, has a 3.9:1 ratio and is the most common. The GDB STi Spec-C also came with a 3.9 but is mechanical type LSD. The later GDG has the Torsen diff and is a 3.5:1 ratio.


  • MyEnquiringMind likes this

#23 locklock

locklock

    Advanced Member

  • Members
  • PipPipPip
  • 221 posts
  • Location:kuala lumpur/malaysia
  • Tagline:New Member

Posted 03 July 2017 - 03:27 AM

What colour pinion gear should i go for if im using r180 4.44?
I only see 4.11, 4.375 and 4.6

#24 d3c0y

d3c0y

    The 2000+ club

  • Members
  • PipPipPipPipPipPipPip
  • 2,909 posts
  • Website:http://garagesanmaru.com
  • Location:Brisbane
  • Tagline:Forum Jerk

Posted 03 July 2017 - 02:36 PM

Let's see now, which one of those numbers is closest to 4.44...
  • 260DET likes this

#25 Roady

Roady

    Advanced Member

  • Members
  • PipPipPip
  • 83 posts
  • Location:Australia
  • Tagline:New Member

Posted 03 July 2017 - 04:59 PM

Purple is the 4.375 - but things obviously can change with wheel size... from experience, I installed the Subaru 4.44 and used the purple... forgot about rim size. Ended up going to the next one up "orange" Speedo cog to get it right.

#26 Cozza

Cozza

    Senior Member

  • Members
  • PipPipPipPipPip
  • 967 posts
  • Location:Sydney
  • Tagline:Datsun obsessed

Posted 03 July 2017 - 06:16 PM

What size wheel and tyre combo are you going for?

#27 locklock

locklock

    Advanced Member

  • Members
  • PipPipPip
  • 221 posts
  • Location:kuala lumpur/malaysia
  • Tagline:New Member

Posted 03 July 2017 - 08:48 PM

My rear tyre is 205-60-15

#28 Cozza

Cozza

    Senior Member

  • Members
  • PipPipPipPipPip
  • 967 posts
  • Location:Sydney
  • Tagline:Datsun obsessed

Posted 03 July 2017 - 09:59 PM

After a bit of searching, I'm pretty sure the standard tyre is a 175HR14 which is close to a 175/80/14 (I think) and your current tyre is a 205/60/15 you now have approx. 1.2% circumference decrease over standard, bringing your final drive ratio closer to:
4.444' x 1.012 = 4.498 : 1

4.5 sits right between a 4.375 and 4.625 so take your pick. If you pick the 4.375, your speedo will read slightly high and vice versa.
  • locklock likes this

#29 locklock

locklock

    Advanced Member

  • Members
  • PipPipPip
  • 221 posts
  • Location:kuala lumpur/malaysia
  • Tagline:New Member

Posted 03 July 2017 - 10:17 PM

Thanks, think it should be fine.. we uses km/h anyway, doesnt really matter if its off abit. :D




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users