1994 Mercury Sable automatic transmission

Visually inspect all electrical wiring, looking for chafed, stretched, cut or pinched wiring.
Ensure electrical connectors fit tightly and are not corroded.
Ensure vacuum hoses are properly routed and are not pinched or cut.
Inspect air induction system for possible vacuum leaks.
Check PCM, sensors and actuators for physical damage.
Check engine coolant level.
Check transmission fluid level and condition.
Chek for codes