My 2014 f150 4x4 fx4 diff just blew up, it’s a 3.73 9.75 with electric locking diff, a guy selling a diff from a 2013 f150 platinum 3.5 L 3.73 9.75 with electric locking diff, question is are they the same diff from just 1 year apart?

 

Yes they're the same

 

Catastrophic failure? How many miles?

 

what were you doing at the time? hauling a heavy load?