hey larry,
welcome to the family, i just wanted to chime in also about the whine.
there is a whine that is heard when the tires are inflated at different lbs. make sure they are all at the same p.s.i., and i assume that they are all matching tires. the t.o.d. doesnt like it when the air in the tires is different, and that causes some whining, and such.
just did my front diff this weekend, and it wasnt bad at all.
thats all i got for now.
good luck, and again, welcome...
david