Check for looseness in the front axle u-joints.
Depends on which part of the truck the noise is coming from. Could be an u-joint, a wheel bearing, a failed transfer case......
A bad gear can cause your four-wheel-drive transfer case to make a clunking sound. The transfer case should be checked immediately.
Buick makes a clunking sound from trans area when accelerating.
When you turn the wheel, or while you drive?
it could be your driveshaft. I'd get it looked at if i vvere you.
Check the CV joints. (front wheel & 4 wheel drive vehicles)
You need to have the abs checked for codes. Then you can diagnose cause.
When you are in 4-wheel drive the front axle is locked so both wheeld drive regardless of traction available, if you drive in 4 wheel drive on dry pavement and try to turn, the wheels will still try to go the same speed and slip on the pavement causing a clunking sound.
There is something serious wrong, please have it checked by a knowledgeable person.
A dodge neon is safe to drive.
Probably a faulty sensor or connection.
you MIGHT put a little more effort into your question - details &H specifics never hurt. in a front wheel drive car, bad , loose CV joints clunk upon turning.