Diff width

[ShaneJ]

The problem for me is that the borg warners are a pain to change ratios. You should be looking into Hilux diffs too.

[shaginwagin]

Hey Shane,   How often are you going to be changing ratios, you don,t have to change every time you change the oil
Julian

[ShaneJ]

Not often but when you have to change it that first time you'll be wishing you want to something easier.

[waikatostocky]

  i have just brought a AU ford diff for my SWB and they are 64" form drum to drum.the current diff is a 2.75:1 and its maken the 253 rev pretty hard.I picked it up for $100 NZ from a mate that owns a wreaker in Hamilton.

[BlackBedford]

G'day

A useful hint if you are going to do a diff conversion, or change the ride height, is to check the driveline angles.
Some people get caught on this one including a bloke that bought a good Chevy diff from me and claimed that it was no good because of a bad vibration. Wedges were put under his diff to correct a missalignment and then there was no vibration.
This can be an issue if you are lowering a vehicle or doing a motor/gearbox conversion.
Check out:
http://www.drivetrain.com/driveline_angle_problem.html
Even lateral angle is be an issue:
http://www.chra.org.au/tips/driveshaft.htm

Regards
Chris

[Warren]

Hey - lightbulb moment

I had a valiant wagon that when fully loaded would vibrate on heavy bumps, I never realy twigged to what caused it.

Never did sort it out

Warren

[waikatostocky]

Thanks for the info chris.

I raced stockcars for 9 years and have done a couple diffs and axles but never now it all. Always someone that knows a little more than i do.

I have found all the people wickedly  helpfull on this site.

Cheers mate

[shaginwagin]

G'day Waikatostocky. Have got a 1977 Chevy Caprice diff in Alien8 at the moment, 2.77 ratio, 253 and trimatic. Great when you get it wound up, but almost goes backwards when you get a decent hill.  With the AU diff do you know if you can get the diff ratios around the 3.25 mark, would that make the 253 run better. If they are 64 inches it will save me getting the  XD/XE diff altered, even though its only going to cost about $300. to widen the diff and redrill the axles and drums.

Julian

[waikatostocky]

 :DHi Julian,Try this link as they do make a 3.23:1 in the AU Falcon.

http://www.difflap.com.au/publications/RATIO.pdf

[waikatostocky]

A correction is required by me on the weith of the AU diff ( dum A##se)

AU Diff is 62" and i have got 16x8 mags with 245/60/16 and there is about 20mm clearance on the inner guards.

Hopefully wont have to flare guards on the back.