Can you post pictures , a great one once said "picture tell a thousand words" :)
Axels are load rated and must match the correct hubs and leaf springs..
Do you have five lugs or four ?
Are you only replacing the axel only ?
I found a wonderful site that instructs you exactly how the measure the bad boy ..
http://aaatrailerparts.com/howto.aspx
PS I just found this also
http://www.easternmarine.com/em_stor...tech_info.html