Ron,
Actually, pulling the pans to change the oil is a good thing. It gives you a chance to eyeball the drive line for any issues that may arise. (hose clamps, tie straps in place, leaks, ect.) Just use a good flashlight, and look everything over good. Many things can't be seen from the top.
If you pm me, I'll give you my number. Then if you see anything questionable, you can call.
Rich :thumbsup