I helped a neighbor change his front seal and timing cover gasket on his 1995 dually with over 230,000 miles, lots of oil leaks! Anyway, we pulled the fan and shroud, the balancer and cover and changed the seal and gasket. While we had it off, I checked his KDP and it was walked out about 1/8in! I checked mine when I did my front seal at about 175,000 miles and it hadn't even started to move, still a couple thousands below the case. We walked it back in without removing the coolers. We used a pnuematic hammer and custom attachment (used a bench grinder) on EXTREMLY LOW AIR PRESSURE!! Walked it back in really easy. We tabbed it, good to go. Just thought some of you might be interested. The only difference, besides miles, between our trucks is that mine's a toy (mostly dyno stuff and recently we bought a camper trailer) and his is a tool (pulls gooseneck trailers all the time). If you are going to change the front seal and gasket, I highly suggest checking out the KDP. There's lot's of pics on the TDR to show you where it is and what it's all about. Total job took 2 hours, including blasting away 10 years of caked oil and road grime! Good luck.