I ask because my tranny developed a hole in the case after the rear tranny crossmember rattled around loose for what was appearently a long time before i owned it. Gear oil is heavy and probably smells bad, especially dino oil. Inspect the leak for thick/smelly oil. Look under your truck just behind where the shifter is for fluid spatter/leaks. Look at the drive shaft where it hooks to the tranny.
I had problems shifting when my fluid got low. Check your tranny fluid. All you need is a 1/2" socket driver, a strong arm, and your finger to check for fluids. Download the
FSM if you need to see diagrams. These FSM's are for the OBDII trucks but older models are physically similar.
