I have the LS Diff in my NC Fairlane that I want to use in the mustang. But it is too wide.
I have another falcon diff out of an EB that I want to remove the shorter tube and axle on, and install it where the long tube goes on the fairlane diff.
I have done a search around on the net and can't find too much info, can anyone steer me in the right direction
Shortened the 2 original fairlane tubes and used the Mustang axles but machined them to take the Fairlane tapered bearings. They have the same spline , i checked this myself and was going to go this way if i decided to use it.
Even with the 2 short NC/EB tubes it is still too wide for a 65-66 and proberly a 67.
housing end to housing end is around 1350 on a 66.
XY-XF diffs only the short side is right for the Mustang long tube and axle, so thats no good'
Your options are
: shorten and respline the Fairlane axles, some say that resplining isnt very strong, but if your a cruiser like me it will be plenty strong enough.
: buy aftermarket axles.
: you could fit a Centura diff a popular conversion on XL-XP V8 Conversions.... I dont know what spline the Axles have. But you might aswell just buy a Mustang one it will proberly be easier with contacts on this forum.
: Find a XL-XP ute or Van Diff they are the right length 5 stud and the Splines may be the same ill have to confirm that one by pulling an axle out of one i have here.
not off hand , i would have to remove the wheels to check, i only have a 67 out that i can measure. the problem with our early models is there is not much room under thr arches for error except by backspace on rims.
If i was doing mine i would shorten and respline the Fairlane Axles or buy aftermarket. I wouldnt use my Mustang ones because i have early model Falcons i would rather use the Mustang diff on for V8 conversions.
I modified a falcon 9inch for my 1970 Capri by making the Short side the long side so I only needed to cut one side of the housing. This also meant that only one axle needed to be cut and re-splined. Relatively easy job as I had the lathe back then. I did make a jig to use to help with straightening the diff housing and I used the plate from the original diff and welded to the 9. Once the end place was welded on the shortened side I used an Oxy to heat the housing and used the jig to make sure it was straight and made sure the modified end was square the the opposite original end. I assume a similar approach would work for the 66 though you would need to measure it up.
Why don't you get it shortened properly? Cut and respline the axles?
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