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CV joints are bad. Look for torn boots and grease.
You do not state which vehicle, so the initial response is the CV joints. however depending on vehicle, you may have a dry upper ball joint on the left check the boot seal and grease it if there is a zerk fitting. On the right side, look for burnished areas where the tire may be rubbing. Also make sure wheels are adequately tight as well. inspect ball joint boots for damage, especially the upper ball joint- any damaged or missing ball joint boots warrant replacement. Also check the other steering components for play- they should be tight with no play. But they should rotate freely.
If you hear thumping when you go over bumps chech the sway bar links up front. There will be awishbone shaped link that is attached tot he frame, and the ends are attached to the lower control arms. The links should be snug.
Before you look at that, check the front end. With the front wheels on the ground, wiggle them from side to side with some force and see if there is any freeplay. If there is it is probably one of the ball joints that has worn. This is quite dangerous and needs to be attended to immediately ut the cost of repairs in not high. Whilst you are checking the front end, make sure that all the mountings are tight. Anything loose can make some very interesting sounds. Another thing you can look at is the u/j on th propshaft. If you get under the car and grab the propshaft, and move it from side to side in the direction it would be going if the car was running and you can hear it clunking or there is any freeplay, that could be your problem, but the noise would be coming more from the middle of the car.
This can be a worn tie rod end, ball joint, steering sector, or some part of the suspension. Put the vehicle on a rack and inspect all components. Remove the front wheels and inspect the brake system. Torque the lug nuts to 105 ft/lbs.
Loud popping/grinding most noticeably heard when turning is normally a sign of a bad CV joint. Look under the van where the axle half-shafts come out of the transaxle and connect to the backside of the wheel assembly. Are the rubber boots on the axles torn or missing? If you hear the popping only in left turns, your right CV joint is bad, If you hear the popping only in right turns, your left CV joint is bad.
My father had this problem on a car years ago and I have see others have it also . The poping noise is often for a ball joint and then the wheel just falls off. Have the ball joints inspected for excessive wear