I had an expedition under my truck today. I checked everything, motor mounts are good, no wear on any U joints, front driveshaft looks fine.

I found a reputable driveshaft shop near me and made an appointment to get it balanced tomorow. That's honostly one of the last things I could think of.
Question: If I take off the rear driveshaft and use 4wheel drive, can the truck still drive semi normally? I don't need to take it off because the shop will, but I'm curious.

Too close for missiles, I'm switching to guns...

'97 4Runner...SR5, 4cyl (3RZ), 5spd, 4wd, no rust, excellent shape.