Looks like this will work on the front of my 2005 Sport Trac, but not the rear - you guys all have the IRS 8.8 and not the solid axle, right?
The sport trac is based on the 2nd generation explorer and has a slightly different front end than the 3rd generation explore. So from this point forward in my post i will refer to the 2nd gen explorer and 1st gen sport trac as a 2nd gen. I don't know of anyone who has fit aviator front brakes to a 2nd gen. The offsets of where the brake is relative to the wheel is about an 1" different between the 2nd and 3rd gen.
Good luck if you decide to go down this route, let us know how it turns out. When I get some free time I will try and take some measurements, as i have both a sport trac and a 3rd gen.
Update:
So, I did some online digging as this got me curious:
1st gen Sport Trac and 3rd gen explorer use the same caliper.
When comparing a 2nd gen and 3rd gen rotors they are similar, but with some key differences:
Sport Trac / 3rd Gen / Aviator
OD: 12.01"/12.01"/12.99"
Height: 2.61"/2.22"/2.29"
Nom Thick:1.02"/1.02"/1.1"
Hub Size: 2.83"/3.23"/3.21"
Bolt Circle: same 5x4.5"
Weight: 19.25#/19.25#/23#
The 3rd gen and 2nd gen have the same size rotors, with 2 main differences: the 2nd gen rotor is 0.41" farther apart from the hub to outside of rotor, so the rotors will not be in the same spot. The dia of the hub is also different.
In order to successfully install aviator front brakes on a 2nd gen explorer/1st gen ST the following would need to occur:
1) Swap aviator front hubs to a 2nd gen knuckle in order to have correct hub diameter. This would only potentially work on a 4wd 2nd generation as the 2wd 2nd gen using a totally different knuckle/hub. I don't know if this would fit on the knuckle.
2) The bolt pattern for the aviator front brake caliper is different then the 2nd/3rd gen explorer, so a bracket would need to be fabricated.
or if 3rd gen knuckles could be used on a 2nd gen then it would be a much easier swap. Both use the exact same lower ball joints and tie rod end, but use a different upper ball joint. Another question would be where everything is in relation to each other. After looking at some pictures they look really similar, the 2nd gen is iron and 3rd gen is aluminum. On the 4wd models both use a 27 spline axle.
This is all assuming one would have at least a 17" wheel, as the aviator doesn't fit under a stock 16" 2nd gen wheel even with the greater offset.
Man after doing this research this has really got me thinking... and I have parts just sitting around to be able to check it. Looks like a new project might be in order.