I recently had my entire clutch replaced. It has probably 15,000 miles on it. Anyway, this was going on before I had the clutch replaced and still persists. When I downshift from 4th to 3rd, the gears grind. This happens only on downshift. I'm not doing any double pumping or rev matching. Once I've driven the car for about 20 minutes, the gear grinding goes away. Is this a transmission fluid issue or a hardware problem? My shop replaced the clutch with a Sachs clutch. Thanks for your help!