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I've replaced the front bearing on a 94 Celica three times in the past 4 months. The third time I replaced the hub as well.
I'm not confident about the reliability of the front suspension at this point, although if the bearing was originally replaced on a bad hub, the hub would've taken out the bearing soon anyway.
Still, on speed-bumps, at moderate speed, the same-side tire where the bearing was replaced seems to "thud", while it doesn't happen on the other tire.
Could the shocks be going out? Could the shocks going out take out bearings? This "noise" I have heard for a long time, through out the replacement of the bearings and before.
The bearings are non-serviceable type, and rather expensive to replace, so I would rather take care of the source problem than the symptom.