Rear Main Seal

I really don't think you need to drop the trans unless you want some extra room. Yes you have to drop the pan and take the number 5 main cap off to do it. It's not that bad of a job and if you have a lift it's alot easier. good luck. Oh before I forget you will have to rip apart the steerign linkage and jack up the motor and sometimes loosen the headers to get the pan off.