Mechanics

LOUD CLUNKING NOISE IN 4X4

GMC C1500

I have a 89 Chevy K1500 long box. When I put it in 4H or 4L it makes a loud clunking noise. I am not sure if it is staying locked into 4x4. It has the automatic hub locks, so I don't know if that could be the issue. It drives fine in 2wd with no noises. In 4L is seems it is trying to kick out of 4L and sometimes ends up being in the Neutral setting. Transfer Case? Axle problem? Hub issue? Any advise would help. After a little more investigation I have found that the loud clunking noise is only happening when the wheels are turned. It does not matter if the wheels are turned to the left or right. If the wheels are straight the clunking noise stops. I am guessing this would eliminate the transfer case or the driveline as the source. Any words or wisdom?
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Slopez
January 22, 2006.



Drive line. Transfer case chain drive. Auto hubs. Ring and pinion. U-joint in the steering knuckle. Take out the drive line. Then engauge the transfer case if there's still a clunck you know what direction to go. Good luck

Tiny
Palco
Jan 22, 2006.
Sounds like splines on front drive shaft are worn out had a 92 chev sivlerado 4x4 had it in 4 hi and heard a pop. Splines were gone

Tiny
Kazoo2281
Jan 22, 2006.
Any info.

Tiny
Slopez
Feb 1, 2006.
Check u joints in front axle for play

Tiny
Chevy350guy
Feb 2, 2006.