Ok my SVT is doing the same thing... Has about 35 k mile son it... had the clutch flywheel and bearing replaced a month ago... in 1st and reverse it "knocks" when i start and when i slow down, all right around 1500 rpms. I had my car in the shop at bill brown in livonia last time for the clutch for almost a week and a half BEFORE THEY EVEN LOOKED AT IT! I am gonna be without my car for awhile, i can tell.