My 97 ford ranger leaks coolant onto the rear of the engine, by the transmission area?

Leaks before transmission housing.

It leaks at the bell housing? Behind the transmission torque converter there are freez plugs in the engine and one could be leaking! Or it might be leaking from the intake gasket!

Check your heater core hoses

The coolant is under pressure. You could have a pinhole leak anywhere in your coolant hoses or radiator and it would be sprayed toward the back of the engine.
After driving it and before shutting it down, pop the hood and check.

4.0? Their intake manifold gasket is HORRIBLE. Not that hard to change if you have a Haynes or Clymer manual.