4 WD clunking and clicking sound when turning left or right

Could be worn cv joints, ball joints etc. The clunk could be a brake catching when the TCS is changing

go to the magicmechanic website and send him this--hes the best there is and will rply

replace the locking hubs a sit appears the lock splines are damaged.

A bad axle will make a continuous clicking or clunking sound when making a sharp turn (left or right), but if they are really worn out it would not have to be a sharp turn for them to make that noise.

Have you check all your fuses??

Try this: Put the car in low gear, engage the 4 wheel drive, wait a few seconds (the 4wd indicator lights should be flashing) then accelerate to about 3500 rpm and let off the gas pedal all the way. You should here a 'clunk' when it engages.

When engaging the 4WD system, you are pulling the lever on the Transfer Case right? Not the transmission, it's a different gearbox.
There were several versions of transfer cases that used both full and part-time 4 wheel drive.
From your description this sounds like a part-time transfer case.
Going with that, it is somewhat normal to hear and feel a mild clunk when engaging 4WD high range, especially if you are at a complete stand-still or under full throttle.
Try engaging 4WD High while slowly rolling at idle - no throttle. It should pull in fairly smoothly.
Once 4WD is engaged it will literally LOCK the front and rear axles together. So do not do it on hard dry pavement.
These older style 4WD systems need a little "give" especially when turning. The engineers assume you are not engaging 4WD unless you are in a somewhat slippery scenario.
Many CV joints, axles, U-Joints, differentials, and transfer cases are damaged and broken by folks who don't understand this.
Reading the owners manual should provide a clearer description of what you've got.
Bear in mind that when you come out of 4WD it may not completely release, again due to hard pavement binding up the axles. You can try this: backing up 10-25 feet in a straight line, or getting one set of wheels on the shoulder or in some gravel. That should allow it to release the transfer case and go back to everyday 2WD high.
I hope this helps.
:)

I have the same problem with my 98 mpv when I flip the switch the light just flash's

1. I would suggest that you engage your 4WD while you are in full stop and/or safe range of 5mph, however as claimed by the local dealers your vehicle is capable of engaging even while driving. Engage your 4WD while moving only when necessity requires.
2. That clicking noise while turning extreme right or left would be the birfield of your axle and would only mean your front hub is still engage even though you have disengaged transfer case.
Have your front hubs cleaned of old lubricants or grease due to non usage. dont use grease as lubricants, use thick oil such as gear oil or silicone oil. and use your 4WD every now and then.

Do this first then check if you still feel somtehing is loose on your suspension and others.

Check your cv (constant velocity joint) , It may have a big clearance which is the source of the noise when turning left or right and when 4wd is engage. Juts like front wheel drive cars, if the cv joint is with clearance it will tend to sound in the left or right turns. It is not exactly clicking sound , nmore like knocking sound , low in pitch, but not heavy.

sounds like you have a u-joint going out or that is out. head down to your parts store or look under neth and grab your drive line and try to move it back and forth. in a twisting motion, there shouldnt be any play between the two yokes.