Rears, Remove drums or discs so your down to the axle flange. You may have enough room to wiggle out the old studs out from between the axle flange and the backing plate and install the new studs if you orient the axle in the correct spot (If you have drums you may need to strip the shoes off the backing plate, If you have discs you may need to remove the parking brake) IF you cant fit them in from the back. Then you have pull the axles out a bit. This is done by removing the rear end cover, draining all the stinky gear oil, remove the 5/16 bolt that holds the center pin in, pull out the pin 3/4 out. Push axle in, Remove C clip, pull the axle out, You dont need to remove it, Just pull it out an inch. Reinstall is the reverse.