if the old bearings are ok then no and u dont torque them u just load them. Then they are locked in place via the too locking tabs also the adjustment on them bearings is what adjusts the back lash between the crown wheel and pinion!. But the pinion bearings do have a drag torque if u have that apart too as the bearings have a certain load on them set by crushing the crush washer!. But u can do this by feel as long as its shimed right so its at the right hight so the pinion teeth mess with the crown wheel in the right place and as for the crown wheel bolts u are meant to but i never have just tight and some lock tight will do fine