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  #11  
Old 30th May 2017, 04:00 AM
skep skep is offline
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Sounds good then with the 4.44 havachat. Might take a little while sourcing the parts as I dont want another couple of boxes lying around the yard just for bits n pieces


Ah i see!! I the difference axle conundrum is in the diff type itself. I thought it might have been a different assembely in the gearbox housing, then connects into the diff! makes sense...

I have done some quick calcs on rpm/final drive of 3.9/4.1/4.44 at 100kph and 5th gear being .738 with 60/65/70 tyres...



4.44 .738 60tyre @100kph = rpm2615 (havachat)

4.44 .738 65tyre @100kph = rpm2540

4.44 .738 70tyre @100kph = rpm2475



4.11 .738 60tyre @100kph = rpm2420

4.11 .738 65tyre @100kph = rpm2350

4.11 .738 70tyre @100kph = rpm2275




3.9 .738 60tyre @100kph = rpm2315

3.9 .738 65tyre @100kph = rpm2230

3.9 .738 70tyre @100kph = rpm2160


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  #12  
Old 27th November 2017, 05:16 AM
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Quote:
Originally Posted by havachat View Post
I originally was only going to do the 1.447 low range until Rick the 'gearbox man' talked me into doing the 4.44 diffs. Having done that I wouldn't do it any other way if I were to do it again.
Oldish thread and all but..
what sort of cost is involved in doing this?
How easy is it to source the parts required?
where do I get them from?!

Anyone?
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  #13  
Old 27th November 2017, 05:26 AM
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You can get the 1.447 SF low range from AllDrive Subaru (new) or from a SF Forester gearbox from a wrecker. Try Rising Sun in Brisbane.

The 4.44 diff you can get from a SG XT gearbox, also get the 5th gear (it's longer to match the shorter diff ratio so you don't rev more on the open road). Also get the speedo drive so your speedo is correct. Try Rising Sun for this too

You'll also need a matching 4.44 rear diff, also from a SG XT manual or from a SG NA auto
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  #14  
Old 27th November 2017, 05:49 AM
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Awesome. thanks for the info. There's an SG at the local wreckers that I think's an auto. Might have to investigate!
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Old 27th November 2017, 06:18 AM
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Thanks Nachaluva for responding to Ben. I got my low range from a SF that had been lowered and was being wrecked. I searched Gumtree for cars being wrecked and got the whole gearbox for $200. Due to a bearing failure I got the rest of the parts off All Drive Subaru, otherwise I would have continued to search the parts out.
Don't forget you need to have the front 4.44 crown wheel milled to take the edge off as they come out of a single range gear box.
With the rear diff if your sphere is going to be reused try and buy the diff without the sphere, but make sure you keep the crown wheel and pinion matched.
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  #16  
Old 27th November 2017, 06:29 AM
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Front crown wheel and pinion you are looking at about $300, plus another $220 to machine it, plus GST. Go for the 0.738 5th gear. It is out of a turbo gearbox. A 1.6:1 low range billet gearset is due for release in the new year. Pricing for that has not been announced, but won't be cheap.
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  #17  
Old 4th December 2017, 07:18 AM
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With the 4.44 Diffs, are they both LSD?
If I'm going to go to the effort of pulling out gearboxes and diffs, it makes sense to do it as well as I can and in one hit although I doubt my budget would stretch to installing lockers, unless they're not an incredibly expensive thing to do compared to 'just' swapping diffs and gears out.
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Last edited by Ben Up North; 4th December 2017 at 07:30 AM. Reason: 4.44 not 1.44!
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  #18  
Old 4th December 2017, 06:18 PM
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4.44 is the diff ratio, LSD is the type of diff centre (open or LSD). You can have any combination depending on what car it comes from.

Yours is a SG NA manual, so it will be 4.111 diffs with a 1.19 low range, open front diff & viscous LSD rear diff

No lockers for our R160 are available yet but you can get OEM & aftermarket clutch LSDs which are almost as good
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  #19  
Old 5th December 2017, 02:08 AM
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Quote:
Originally Posted by Ben Up North View Post
With the 4.44 Diffs, are they both LSD?
If I'm going to go to the effort of pulling out gearboxes and diffs, it makes sense to do it as well as I can and in one hit although I doubt my budget would stretch to installing lockers, unless they're not an incredibly expensive thing to do compared to 'just' swapping diffs and gears out.
Maybe have a look at my build thread, as my starting point is where you are now. Better diffs make a big improvement, absolutely. For rear diffs, plated is the best bet because there is no R160 locker made and R180 if it can be done would be expensive. For the centre diff, DCCD is best. Failing that, viscous diffs with stronger limited slip capability are available. For front, plated is best, although helical and sure trac are available. Some time next year I will be selling my helical front diff. The best time to swap front and centre diffs is as you say, when the box is out.
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  #20  
Old 7th December 2017, 07:32 AM
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Quote:
Originally Posted by Rally View Post
Some time next year I will be selling my helical front diff.
How fortuitous! I'll be in the market for a replacement diff sometime next year... Let me know!
The diff would feel quite at home seeing as it would be going from one poverty pack to another!
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