Local mechanic says that I have an issue with the rear driverside knuckle being bent/warped and is causing the entire wheel bearing to move. Replaced wheel bearing and hub but he said that the knuckle is the main problem, but the squeaking sound seem to have went away. Am I ok or should I be worried???

 

Listen to your mechanic. He's the best placed person to identify the problem, having actually looked at it.

 

Should I expect the squeaking to come back or did replacing the wheel bearing and hub do the job?

 

With the car jacked up grab the top and bottom of the wheel and try to twist it off axis from the hub. If it doesn't wobble you're good.

 

^^Tried that even when the squeaking occurred and the wheel was solid. Mainly concern about if I still need to replace the knuckle even after new wheel bearing and hub has been replaced.

 

If you don't think it was the wheel bearing then there isn't much left. Either do some looking yourself and check all pivots, or trust your mechanic. If you think it's fixed than run it as long as it's nothing dangerous.