For a little over a year now whenever I press the brake while its in drive or reverse the front end vibrates it's wasn't very strong and i was told by my dad who does all my maintenance work that it was nothing to worry about, for the past few months the vibration has gotten worse to the point that sitting at a stop sign or any time the car is in gear but I'm not pressing the gas it vibrates ( it is the worst when the brake is pressed like at a stop sign it vibrates bad enough to shake my arms through the steering wheel). Within the last couple of months I have had my brake pads replaced and rotors turned, new tires put on within the year and I get regular oil chages. Any suggestions as to what could be causing this? My local kia dealer wants over $100 to run a diagnostic check and I really can't afford it right now, we also can't find a repair manual anywhere so any suggestions would be greatly appreciated.
My car has 77000 miles.
My car has an automatic transmission.
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