And do you have the large single-toothed thrust washer between the bearing and nuts too? It should go: outer bearing, big flat washer, nut, lockwasher, nut. Then bend the tabs on the lockwasher forward/backward on the inner and outer nuts. How tight are you tightening the outer nut?

[Linked Image]


'97 4Runner, '06 F350, '86 4Runner, '05 WR450
http://home.4x4wire.com/erik