Well, when my stock clutch wore out at 198,000 and it was time to replace it I knew that I would also be pulling the 318 to put on an engine stand for a while to slowly build a reliable 400 horse daily driver and I wanted a good clutch behind it so I went with Centerforce. So when the truck gets good and warm the clunking seems to go almost completely away. Its not a huge deal, its just one one those things that irritates you, because you cant pinpoint where its coming from. Ive had her for 10 years now and she has been so good to me. Im doing a ground up resto. Its almost 100% mechanically sound, I just wish I knew for sure it was the transfer case before I opened it up. But like I said in the earlier post, the rebuild kit is under a hundred bucks and its half a Saturday to take apart and rebuild. I was figuring someone else on here had the same issue with a 99 4x4 with around 200k. I got mine with 40k and do maintenance religiously. I do drive it like I stole it though. I dont really do much off roading. I may put it in 4 wheel drive 2 times a year. Im more about putting on a smoke show. I have a Detroit True Trac rear end and the centerforce clutch and built the trans myself so I know it can take the punishment. When I got it, I was living in Pennsylvania and needed a 4x4, now I live in Texas and wish I had 2 wheel drive. A lot less problems to have.