The front drivers wheel wobbles

ancient car needs alignment fast it might need only adjustment

Needs a front end alignment

I had that same problem on my Toyota pickup once and replace the wheel. No more problem. Wheel must have had a certain warp to it. Normally though, this wobble you feel would be a burnt spot in a rotor. But you've replaced that.

the brakes have not been set properly. may be something stopping the pistons going back in. failing that the disc's are bent, can happen when over braking down hills etc. you would need the alinement checking.

Pull the hand brake. Block the rear wheels and transmission in neutral. Jack up the front wheels, first rotate the right wheel and if it slightly resists, its normal.Similarly check the left wheel also. If any one of the front wheels is hard to rotate, remove the Tyre and service the caliper assembly by greasing the pins with graphite grease. Also check the piston of the caliper assembly if it is not stiff. If so, free it up or replace the caliper kit with a genuine one on both sides. Always service both the front and rear brake system simultaneously.
If both the front wheels are jammed, the probable cause is the brake master cylinder assembly which need to be replaced with a new one.
If both of the front wheels are found to be normal, lower the front wheels and lift up the rear wheels. If any of the rear wheels are found to be partially of fully jammed, readjust the rear brake system or hand brake cable.

you need to have your tires checked for a slipped belt, also if you get a shake in the steering wheel when you apply the brake you need to have the brake rotors re-surfaced or replaced.

I would call this 1 of 3 possible problems.....

This first could be a bad or unbalanced tire. Sometimes the multiply ties we use on cars separate between layers, this causes an un-natural bulge that can not always be seen, but certainly can be felt while driving. This is called ply separation. An unbalanced tire, which could be caused by a wheel weight falling off, or a shift in weight that could be cause by something like an impact break or the ply separation, would also cause a wobble that varies at different speeds. The best way to check it out without a shop visit, is to take the wheel off and just inspect it, make sure everything is smooth and even.

Secondly, a wheel bearing could cause a wobble as well. The self test for this is to jack the car up, leave the tire on and wiggle it. It should feel tight all the way around and not move up to down, or side to side. A way to test this unit while driving, which is not always accurate 100% but will give you a clue as to where to look first is drive in an area free from other traffic, when it starts to wobble, turn to both the left and right without touching the break. If the wobble goes away it is likely the cause.

Thirdly the ball joint could also cause a slight wobble. To check this, I usually jack the car up, do the same wobble test as described above, then remove the tire and inspect the joint. A good joint will have absolutely no tears in the boots. It should also feel solid at you try to move the other components that surround them.

Good Luck, we are here if you need anything further.

Chevy is having problems with the steering columns on these models. Feels like a jiggle in the steering wheel when you hit a bump of any kind. Cost about $75 at the dealer for a new part.

the wobble you referred to many be the front wheel bearings.
jack the front end of the astro up and wiggle the front tires.

if they wobble or there is a lot of movement check the front
wheel bearings on both sides. they are inexpensive.

have someone take a look at the wheel bearings and tyrod ends, i know these will cause that, you may need these parts or you may be just lucky and a need a wheel balance and alignment, any general repair garage can take care of these problems