Im kind of curious about what a gen 2 looks like lowered? I need to see a pic of this. But I do think redo springs or if you like the looks of it get air bag helper springs.
I think what he ment in the original post was the other owner changed the springs for hight but did up grade axle thinking he could still tow. But I sugested new springs unless he liked the looks of the truck then add air springs.Are you asking about the "kind" of rear or the kind of springs??
I believe that the underlying issue here is clearly asked as to the REAR differential and that the member has out-rightly asked about the REAR differential and how to identify it. Is it that hard to identify what the member is asking.
How about a little reading and comprehension commitment.
Now if anyone wants to address the springs again how about this:
NO THE MODIFIED SPRINGS WILL NOT WORK. AT A MINIMUM THEY WILL HAVE TO BE RETURNED TO FACTORY SPECIFICATIONS.