03 Rancher 350 es front diff seal replacement / clymer or haynes manual? ?

Hey all I’m new here , I’ve got a couple questions for ya’ll . I’m getting ready to tackle a leaking seal . It’s the seal on the front diff where the shaft from the engine goes into the diff.. anyone had experience with this ? Is it a hard job ? I’m assuming I should remove the diff to make it easier. Also I’m going to buy a new repair manual and am leaning towards the Clymer rather than the Haynes what’s everyones thoughts? Thanks in advance :icon_ peace: