epricedright Posted August 23, 2004 Report Share Posted August 23, 2004 KHE Posted on Aug 22 2004, 09:38 AM The 4.9 is a reliable engine. At higher mileage, they may exhibit the main bearing thump noise but that is totally harmless and easily fixed by replacing the #1 main bearing with the service replacement bearing. I hear a mild thumping, knocking, or clunking noise...usually after it's warm...coming from the engine I think. It's hard to hear sometimes and as far as I can tell the noise seems to cut out around 20 mph. Maybe the other noises (road) drown it out at 20 mph, not sure. I hear it though when I pull up the driveway. I dont hear it in Park...idling or when reving it. This is the same noise I thought I was only getting while turning right (earlier post). How do you think I can isolate where it's coming from. Could the tranny make a thumping noise like that, CV's or motor? Link to comment Share on other sites More sharing options...
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