I recently pulled my front carrier to replace the axle seals, after I put it back in I noticed the backlash was an awful lot, So the dial indicator ranged from 14-17 thousands Which I know is too much, The ring gear side has 1 shim and the carrier side has 2 shims, Im assuming it was like that its whole life the truck only has 28,000 miles, So I understand I need to add some shims to the ring gear side but the shims are behind the bearings so my question is do I need to remove the bearing to add a shim, if so how much shim would be appropriate?