Recently had a GT Mustang with a howl in the rear differential. Marietta Alignment was recommended to me. Carried the car in Monday evening talked with them before allowing them to work on car they answered all my questions even knew the tolarences in the ring gear and pinion.Gave me a estimate and explained what they were going to replace..Picked Car up Tuesday talked with Ed he explained what they had replaced, clearances ring gear and pinion were set at even the type of dope used. I asked him how quiet is the rear end he replied you cannot hear it.. True to his word rear end noise is gone. From what I gather they rebuild rear ends regularly and as anyone knows not just anyone can set them up properly. Believe you me Ed has his act together. Everyone was very friendly and helpful.
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