My Enclave just turned 50k and when i put the car in gear (drive or reverse foot on the brake) and accelerate or decelerate, there is a clunk sound coming from the front driver's side. It sounds like a worn u-joint would sound. I've taken into the dealer twice already and they said it's due to the front brake pads being worn. Last night, I replaced the pads with an OEM set, which included the shims and brackets. The noise is still there and getting worse. I'm thinking the driver's side axle has a bad joint. Anyone have a similar experience and fix the problem? I'm dropping it back off to the dealer tonight.