I'll be looking to diagnose a speedo problem as soon as I get home in Sept. For some reason I'll be running down the road and look down to see it reading 25mph when I know I'm doing at least 40. Then sometimes it won't register at all. Still other times, it'll be registering what I feel is accurate and then just drop down 20+mph. I figure it's one of three things, the speedo, the cable or the gear in the transfer case. The cable being the cheapest and easiest to replace, I figure I'll replace it first to see if it fixes the problem. If not, I'll look to the transfer case. When all else has failed, I'll take a look behind the speedo to make sure everything is good there and replace as necessary.
So there's my gameplan, but being about as new as they come to the Jeep world, any input would be greatly appreciated.