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Diff replacement/gearing change 

 

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 Post subject: Diff replacement/gearing change
Posted: Sat Jan 09, 2010 10:19 am 
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Age: 36

Posts: 3

Joined: 21st Oct 2009

Ride: Ford Falcon XK Wagon

Location: Gold Coast
QLD, Australia

Gday all,

I have succesfully replaced the 2 speed auto with a 3 speed manual, although the 3 speed has decreased the revs at 80/90 a little its still not where I want it to be, drinks too much fuel keeping up!!

I was wondering if anyone knows of a diff thats a suitable replacement for the 3.5 ford diff!!

I know that the xk is a narrow wheelbase rig, but i recall reading somewhere that there is a mitsubishi diff or something like that that needs little to no modification to bolt up. I would go and get a 8 3/4 diff cut down to suit but i dont have a spare grand lying around (quotes rangefrom 850 - 1200). Any thoughts, or does anyone know of someone around the gold coast with 60's mustang diffs they want to offload??


Cheers
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 Post subject: Re: Diff replacement/gearing change
Posted: Sat Jan 09, 2010 10:28 am 
Getting Side Ways
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Age: 45

Posts: 1953

Joined: 1st Feb 2006

Gallery: 25 images

Ride: BA on gas. EL on gas. XF on gas.

Location: Greenacres/Adelaide
SA, Australia

By memory a XW/XY diff is shorter a XA on.

 

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 Post subject: Re: Diff replacement/gearing change
Posted: Sat Jan 09, 2010 10:37 am 
Smokin em up
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Age: 52

Posts: 253

Joined: 22nd Mar 2008

Ride: BF F6 Typhoon. XP Van.XF Hearse

Location: Newcastle
NSW, Australia

If you can get hold of a 3.2 ratio crownwheel & pinion that was optional on some XP's that had 14" wheels, But i have seen them in XL's & XM's as well & have it fitted into your housing is the easiest & cheapest option.

A 6cyl Centura diff fits straight under once you fit the Falcon spring pads, But then you have to get your axles re-drilled to 4 stud (or convert your fronts to 5 stud to suit) & have your tailshaft modified to suit the bigger rear uni that is needed. But Centura diffs are getting harder to find & expensive due to them being popular also with the hotrod boys.
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 Post subject: Re: Diff replacement/gearing change
Posted: Tue Feb 02, 2010 10:10 pm 
Getting Side Ways
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Age: 55

Posts: 1566

Joined: 12th Apr 2008

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Ride: 5.0lt NF /351 ZD Fairlane

Location: Wattle Grove
NSW, Australia

Compact Fairlane Diff perhaps?

 

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 Post subject: Re: Diff replacement/gearing change
Posted: Wed Feb 03, 2010 8:56 am 
Getting Side Ways
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Age: 45

Posts: 863

Joined: 26th Nov 2007

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Ride: XH Ute / AU3 V8 Wagon

Location: Bris-Vegas
QLD, Australia

You could try some of the local Mustang importers. A pre-67 mustang diff will fit straight in, and there are a lot of 6 cyl s**t box mustangs around that have had a v8 & 9 inch conversion. You might be lucky....

 

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EL Wagon Build Thread http://www.fordmods.com/the-garage-f53/sooty72-s-ef-futura-wagon-long-term-project-t90025.html
XH Ute Thread http://www.fordmods.com/post1138970.html#p1138970

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