2001 ford explorer front-end shaking

Last week I had the brakes replaced in my 2001 Explorer Sport...new
pads all around, new rotors in the front, and turned rotors in the
back. The first time I got on the interstate (60+ mph), I noticed a
vibration and a low-frequency noise coming from the front end. The
vibration and the noise both increase significantly when I hit the
brakes. Also, the vibration gets worse if I am turning slightly to
the left (still at highway speed only), but not to the right. The
vibration is not constant; it only happens for the first 20-30 minutes
after I get up to highway speed, then it goes away and driving feels
normal.

I've talked to a few people, and gotten a different possible
explanation from each of them.

1. separated belt in a tire
2. bad bushing
3. something wrong in the steering linkages...ball joints, tie rods,
etc.

I guess it could be any of these things, but one thing doesn't make
sense...why did this suddenly start after I got my brakes replaced?

Any thoughts on what could be wrong?

On Feb 11, 6:10 pm, wrote:
> Last week I had the brakes replaced in my 2001 Explorer Sport...new
> pads all around, new rotors in the front, and turned rotors in the
> back. The first time I got on the interstate (60+ mph), I noticed a
> vibration and a low-frequency noise coming from the front end. The
> vibration and the noise both increase significantly when I hit the
> brakes. Also, the vibration gets worse if I am turning slightly to
> the left (still at highway speed only), but not to the right. The
> vibration is not constant; it only happens for the first 20-30 minutes
> after I get up to highway speed, then it goes away and driving feels
> normal.
>
> I've talked to a few people, and gotten a different possible
> explanation from each of them.
>
> 1. separated belt in a tire
> 2. bad bushing
> 3. something wrong in the steering linkages...ball joints, tie rods,
> etc.
>
> I guess it could be any of these things, but one thing doesn't make
> sense...why did this suddenly start after I got my brakes replaced?
>
> Any thoughts on what could be wrong?

I had the same problem with my 2001 SportTrac. Both times after I had
the pads replaced, I had shaking in the front end. It went away after
some low speed street driving, about 20 miles. After that, I was able
to take it back on to the freeway.