Bad CV shaft maybe.
Sway bar bushings
Possible bad front end part.
Most likely you need a new strut
If the clunk is most noticeable at takeoff or when coming to a stop, the u-joints on the drive shaft probably need to be replaced.
It depends on when you hear the noise, but it likely a joint in the front wheel drive unit.
check your front suspension spring
lift the vehicle about 6 inches with a jack and check your ball joints for up and down movement with a pry bar under the tire
Don't switch on the fly, that's just stupid. You'll need a whole system overhaul.
If the clunk is in the transmission then it may be time to replace in that there is a history of some problems with the electronic transmission. Check the mileage and maintenance history. If it sounds like it is in the front suspension as your inquiry implies, it may simply be that the sway bar bushing and links are dry and/or in need of replacement. You might also check out TSB 23-01-97A (Front end noise upon deceleration) and/or 19-14-97 (Tie rod - popping in front end). Good luck!
check the fluid in the rear end it might be dry causing medal to grind causing a clunk noise or the gears in the rear end or worn done causing it to do the same thing
Worn out bushing or steering joint probably.