My breaks keep grinding and I already payed to get them serviced. I hear knocking noises when I turn. whats the problem?

They can break, but they give plenty of warning signs before they do. Clicking or knocking when making a slow turn, Vibrations going down the road. The rubber boots on each end will sling grease, before they break. If by chance the shaft broke, it was a defective part.

This due to either a worn wheel bearing or a worn front drive arm.

The most common cause of a grinding noise when turning is a worn front wheel bearing. What happens is that the weight of the car is shifted on to that wheel as you make the turn causing the worn bearing to make a grinding noise.

pull break pads. put car in nuteral, spin wheel listen for sound, keep in mind both wheels must be off ground. If hear sound figure out if it is in traning or wheel. do not hit breaks while pads are off will damage break system. if no sound look at break system.

when a car is under warranty it is always best to speak to the dealer as ,with hyundai warranty,if they find something wrong hyundai pay for it....and you get ot know them a bit better(it helps)
the reason for me suggesting this is you have not descrbed the noise and what you are doing to generate this noise.......(is it a squeek,a grinding, does it stop when you brake hard/soft...etc

most common cause is rear pads sticking (rust) and when you move, it has to break the rust from the rotor,hence the grinding noise.as long as it only does it when you start moving or turn first thing do not worry.....

do breaks first.

Time for a serious brake job my friend. Your pads/shoes are shot and the grinding noise is the rivets eating your disk or drum. They don't like to let go. Mileage suffers. Stopping distance increases. You must get this repaired as soon as you can. Expect to pay up to $800.00.

Thanks for your interest in FixYa.com

I doubt you going to get a code from the transmission. Im surprised that shop you have it taken to cant tell you what is the problems. If you have high miles as 100k chances are the tranny is worned and need service or replacing. Transmission rearly grind or make a grinding noise, the brakes will make the grinding noise due to the worned pad as metal rubbing on metal, have all breaks check. If the van is 5speed, yes I can see the tranny will make a grinding noise VS automatic transmission. I would take it to another shop and get another opinion or take it to the dealer which they usually charge 70-75 buck to have it diagnose. If tranny need replacing check ebay to junk yard, is lot cheaper and as good than having it rebuilt.

CV joint. Take/Tow your vehicle to an authorized Hyundai dealership and pay the diagnostic fee... they will tell you exactly what the problem is and the cost of parts/labor to fix it... at least this way you'll know what the problem is and what's required to fix it.