I have used a floor jack thru the passenger door to connect to a small chain connected to the gearbox. With the drive line disconnected from the gearbox and moved, tilted, etc, I slide the gearbox back and lowered to the ground, disconnect from the floor jack and then slide it out on the ground from under the truck. Pretty simple.

Craig

My '50 Chevy 3100 5 window, '62-235cu, 3:55 rear
My truck ....... Respect The Rust
If I'm not working on my truck, '65 m00stang or VW camper, I'm fishing with the wife or smoking Salmon.