A grinding noise in the front end when in four-wheel drive and turning can be caused by several factors, including worn or damaged CV joints, a malfunctioning transfer case, or improper engagement of the four-wheel-drive system. Additionally, if the front differential is low on fluid or has damaged gears, it can also produce grinding sounds. It's important to inspect the drivetrain components, as ignoring these noises can lead to further damage. Consulting a mechanic for a thorough diagnosis is recommended.
if its a front wheel drive vehicle then it could be the axels
Have your brakes checked, rust or wear on brakes can cause grinding when turning.
If you vehicle is front-wheel drive, more than likely, that grinding crunching sound when you turn is coming from the CV joints.
brake pads shot
Brakes
Either you tire is rubbing or if its a front wheel drive it could be you "CV" axle's... Other than that i don't know i hope that helps?
not sure sound like it comes from front suspension
most grinding noises that come from turning is usually a cv axle that needs to be replaced. Can also be a bad wheel bearing. If you hear the grinding when turning to the right then the left front wheel bearing is bad.
Check the drive axle for a broken and leaking boot or bad CV joint.
Bad right front wheel bearing.
More than likely you have a defective left front wheel bearing. Inspect the bearing and also inspect the bearing on the right front. Inspect your brake pads if this is not the problem.
Perhaps something in your front differential is not right and it is spinning your front drive shaft, instead of vice versa.