It's time to buy a new truck...and I have decided on a late model Ram. I have been able to find a couple extended cabs in the 98-00 range with appx. 50k miles for about $15k. Is there anything I should look out for while test driving, inspecting, etc? Someone told me they have seen Ram's in that year range with transmission noises that can only be heard when the truck is cold. Any ideas or info. is greatly appreciated.