I am working on a 1994 Eldorado that is leaking transmission fluid. I need to know if there is a easier way to replace the oil return line without having to drop the trans axle?

 

You don't need to drop out trans, you will need to drop rear of powertrain/sub-frame to gain access. Take master cylinder loose from booster to aid in routing. It will be a pain to do it in the driveway on jack stands.