in looking at rear disc brake options, i have read a lot of posts that work on options for guys with srw but nothing for us with dually's, one guy posted that he was using parts from a 99 E series because the wheel patterns are the same as our older trucks, one guy with a dually asked about using a 99 dually disc rear for parts, so i looked up some info and wanted to pass it on and ask some questions: first the link -
http://www.originalwheels.com/ford-wheels/vanse350rims-1999.php

this company lists the 1999 -2010 dually wheel for the E series as 8 x 6.5 bolt pattern, so I went and looked at a Uhaul truck with dual rear wheel and disc brakes, i did not have a tape to do any measurements i will get that soon to see if guys with dually rear ends can just do a axle swap to get the disc brakes from a Uhaul type truck, now for the question, does anyone know of info on the web where we can get spring perch spacing info for the Uhaul type trucks?

 

E series use our bolt pattern 8x6.5 up to 2008

 

Any super duty( F450) from 89-97 will have disc brakes. Take the entire axle.

 

The F-Superduty rear axle does indeed have discs, but no provision for a park brake. Those trucks have a driveline park brake on the back of the trans. It's also a Dana 80 10-lug axle.

 

Obs 450's are dana 80 10 lug's

 

they still use 8 x 6.5 including 2012 E250/350's.

 

so back to the question of whether or not we can use the newer rear ends with disc brakes on our older trucks, i gather from reading so far that we have dana 70 rear ends under our duallys and the newer trucks have a 10.25 rear end, so my question is: physically are they the same spring spacing so a simple swap could be made with out any changes other than dropping a axle and bolting in the other axle?

 

My truck has a 10.25, but a newer 99-04 bolts in after u drill for a larger shackle bolt. And u can get drilled an slotted rotors if u pull heavy loads

 

If you've got an F350 you have a Sterling 10.25. The 99-04 uses a Sterling 10.50. Is yours a pickup or cab and chassis? The axle widths are different and a cab/chassis axle won't fit under a pickup.