do a eaton or a tru trac posi unit and some 410s.i was hesitant for awile to do 410s so i stayed with 373s.when i blew this last one i had a set of 410s convienient and put em in.it was worth it ,theyre not too steep ,driveability is fine and just a tad bit pepier.just remember if oure 4wd you have to do both eventually.