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This is an increase if distance from the wheel mounting flange to the rear end bearing end, correct? .......
Correct, Disc brake axles are something like 1.88" offset and this disc brake setup requires an 2.5" offset along with most aftermarket brake setup in order to center the rotor correctly in the Brake caliper bracket.
Thanks Dave for all of the info and the write up on this conversion. I am getting so much different information from different companies, I have decided to tear this axle down and take some measurements before ordering any parts. This thing is pretty crusty and needs a pinion seal at the very minimum (but will get more than that). I did find this in the web and it may be helpful to some doing this or a similar swap.
Edit:
I have spoken to 3 different companies that specialize in Ford 9 inch rear ends and received 3 different answers to some of my questions. Two of the companies have expressed to me that the bearing ends (the shapes) are not a good way to determine if Explorer style brakes will bolt up. The measurements should be 2 inches up and down and 3.562 across. The picture above will need to be measured and be 2.50 inches. SOME axles may be the right offset, but this isn't the norm. Thanks to Dave (reps sent) for allowing us to junk up his thread with all of this information.
The flange and bolt pattern dimensions (4 bolt hole locations) determine if the explorer brake bracket will mount up. The axle flange offset determines where the rotor centers within that brake bracket to line up in the caliper.
Just getting started on the Explorer brake conversion on my '79 Bronco with factory 31-spline 9" rear. I've read on this forum that these brakes can be adapted with some minor mods to the early big bearing Ford flange, so going for it! I've got the Currie spacers and 5x5.5" rotors, so we'll see how she goes... I noticed that the e-brake assembly from the Explorer looks to be a direct drop-in to the '79 Ford, so that is a nice thing, for sure!
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