I dont know if anyone has run across this before but im trying to figure out what axle i had in my old truck (rebuilding a clone). This is a little confusing so bear with me. Originally the truck had a d50 in it so i swapped it out for a d60 from a salvage yard. It was a high pinion d60 with factory 4:88 gears out of an f-550 and i cant remember the year but it was between 03-05. I researched and found out those are the years they changed to the super 60. The d60 i got was 2" wider between spring perch and knuckel which makes me think it was a super 60 however they only made the super 60 with coil springs, or so ive read, and i was running a leaf spring set up which the d60 i got from the salvage yard bolted right up to. Thats where i am at and its frusturating the heck out of me i just want to know definitavley which axle i had