Ford Repair: Front end vibrations, rear drums, jerry willis

Question
I have a 1997 F-150 Lariat (3-door, extended cab, 2-wd, 4.6, automatic). I recently had a complete brake job, (replacement of front rotors and rear drums). I now have a noticeable vibration, more prevalent when speed reaches 60mph(+). I have returned the truck to the shop where the work was done, but no results. They have taken two steps to resolve this, but with no success.
1. Re-balanced the tires
Returned the vehicle after because of continued vibrations.
2. Re-seeded the tire that said was not mounted correctly

I asked them if the problem could be the alignment, and they told me no.
Please advise.

Thank you,

Jerry Willis

Answer
well it could be an alignment, if it is toed out or in too much , also when driving turn off overdrive,and see if it goes away , if soo its a problem with over drive in trans , the tires could have a sifted belt also...... dooes it vibrate at very low speeds, and is it the truck that vibrates or the steering wheel