Actual CV is probably what is wearing out. If it isnt worn out, the boot probably broke. Get under the car and see what is visually wronge and report back. But yes, lowering a car can cause premature CV joint failure. A whole new axel is about 90 bucks from the parts store with a warranty, and install is about 30 min. DONT get those garbage boot replacement kits (personal prefrence)!! good luck.