if with shields you mean the rubber discs/seals between the inner and outer races, then no, that is a sealed bearing, and if my memory is right of 4X4's they have this set-up. The 2WD has a non-sealed bearing that needs to be packed (fronts).My 98 Taco 4x4 uses the double one piece large roller bearing. Upon installation does that bearing need to have the sheilds popped off and packed with gease? Any help would be great! Thanks!
Maybe someone else can help more, might mention whether you mean front or rear in case it makes a difference.