I changed my driver side brakes and rotor today. Afterward there is a clicking sound coming from that rear tire, it changes with the speed. is this normal can it be fixed?

Also, when the car is in park and i press the brake, now the gear box makes a clicking sound. it clicks only once when ever the brake is pressed, it didnt do it before i replaced the brakes. any help would be greatful

humm if the noise was not there b4 u replaced only one rotor and why u did that i have no idea if there was not a noise b4 u did it and now there is one u must have caused it so go back and look at all the items u messed with.