I would recommend that you use the oil that you use every day, assuming that it's a multiviscosity, high quality oil. Some will tell you to use a synthetic oil but I don't believe that it's necessary. If you change your oil and filter every 3000 miles, as you should anyway, your engine will be happy. It is a good idea to have a transmission oil cooler when towing but that's a separate subject.
The 2001 Jeep Cherokee has overhead valves (OHV).
The 2001 Jeep Grand-Cherokee has overhead valves (OHV).
The 2002 Jeep Grand-Cherokee has overhead valves (OHV).
The 2007 Jeep Grand-Cherokee has single overhead cam (SOHC).
A regular Cherokee uses Dextron A Grand Cherokee uses Mopar ATF+4
Really depends on the rear end gearing and type. Typically 2000 max unless you have a towing package then I believe it can be as high as 4000.
10w30
10w30
R134a
The trans is called a 42Re
Mopar part number 5281090
Atf+4
The 2001 Jeep Cherokee has overhead valves (OHV).
The 2014 Jeep Cherokee has single overhead cam (SOHC).
The 2003 Jeep Grand-Cherokee has overhead valves (OHV).
The 2004 Jeep Grand-Cherokee has overhead valves (OHV).
The 2002 Jeep Grand-Cherokee has overhead valves (OHV).