Robert provided good suggestions as to potential causes of problem. Mechanic diagnosed likely reason. Robert notified of determination of part needed, cost and timeline for repair. Prompt and sequential; when work done, follow through by Robert to confirm completion and coordinate pick up before he left the shop was professional and thorough. No ball was dropped and the customer was informed all along the way. Excellent communication and customer service. Reason I came to QualTech, after very poor experiences with unethical practices of Drivers Edge staff.