Thumping sound at slow speed

most def you need an alignment and you also need to check inner outer tie rod end and check the tires belt as well

Have the wheel bearings been checked?

Have you had this listened to or driven by a front end repair person, they are very good at noises, i think this is a worn part that causes this, just can't remember which one, the dealer is your best choice here.

Many times, rear tires that are out of round or severely cupped or feathered, or that are out of balance can create this type of issue. My first recommendation would be to have them and the wheels on the rear of the car inspected. There may not seem like there is much wrong visibly if you look at just the tread of the tires, but a good tire tech can spin them up and give you some solutions, and the inspection itself is inexpensive. Hope this helps.

put rear tire in front front on rear see if anything changes

THUMPING NOISE COULD BE BLISTER OR BUMP ON THE TIRE,IMPROPER SHOCK ABSORBER OR STRUT DAMPER ACTION.

sounds like a tire may have a flat spot on it, causeing it to make a thump noise. the main cause for this is bad shocks or struts on that side.

Most likely you have worn out suspension parts. A front shock could cause the problem because the rubber bushing holding it in place may have dried up and fell out. Upper and lower A-arms have rubber bushings as well.
Best to have the front suspension checked out before it gets worse.

IF IT ONLY THUMPS WHEN YOUR CAR IS MOVING YOU COULD BE WRITE. PAY ATTENTION TO THE THUMPING CLOSLEY, DO YOU FEEL A VIBRATION IN THE STEERING WHEEL, IF SO THE PROBLEM IS IN THE FRONT END. IF YOU FEEL A VIBRATION IN THE DRIVERS SEAT THE PROBLEM IS IH THE REAR END. YES THE VIBRATION FROM THE FRONT STEERING AND THE DRIVERS SEAT IS A WAY TO TELL WHERE THE PROBLEM IS

it could be a rod in the lower part of the motor,,,thats what it sounds like to me and if it does it while you sit and idle then its in the motor somewhere