I'm looking to purchase a 1995 Ram 3500 V10 with 120k miles on it for towing purposes. The seller advises that the transmission was recently replaced with a "2600" transmission. Not sure if that is the correct transmission for the vehicle. They also advise that the front end differential needs replacing. I estimate that to be about a $2k cost to do. Is there anything else I should be looking for in a truck of this age and miles or anything I should expect to come up soon? I had a 96 before with similar miles and both the AC and heating went out before I decide to trade it in.