Rear drivetrain "Kink" sound

[Gerdo]

This is on my 2000 4runner 4x4.

I have had this sound for a year or two now. If the vehicle is stopped and I let out the clutch a little aggressively I get this "Kink" sound, only once. If I stop and go again it usually doesn't make a noise. If I do the same thing in reverse it will also make the sound. If I do a forward/reverse/forward it'll do it every time. If I'm backing up an incline it'll kinda sound like the rollercoaster going up the hill. (kink kink kink)

I have pulled the rear driveshaft and driven around in 4Hi and it is perfectly quiet. I also rotated and felt the u-joints and everything felt tight and smooth. I have always kept them well lubed, the slip joint too.

Could this be the clunk that LC 80s have? (driveshaft)

Any thoughts.

 

[raydouble]

My buddy had a persistant problem with a sound like this until he pulled apart the slip joint and cleaned it and regreased the splines. PS, pull out the grease fitting or you will never get it apart.

Have you verified the rear diff oil level is good?

 

[Gerdo]

I have heard about the LC80/100 thunk.

Mine is a faint kink sound and it can't be felt.
Tomorrow I'm going to pull my rear DS and feel the U-joints again. I'm also going to pull the slip joint apart, clean and regrease.

 

[raydouble]

I have heard about the LC80/100 thunk.

Mine is a faint kink sound and it can't be felt.
Tomorrow I'm going to pull my rear DS and feel the U-joints again. I'm also going to pull the slip joint apart, clean and regrease.

Hollow metal "tink". My buddies only did it in reverse. I bet that will be the issue.

 

[Duane]

do you have a factory rear diff lock or an open rear pumpkin?

 

[Gerdo]

ARB. Makes the same sound locked or unlocked.

 

[Duane]

a rear ARB air locker hey... with a stick.. nice rig!

Coincidentally if the "kink" sound has been around for a year or two... when did the arb go in?

 

[SC T100]

I'm also going to pull the slip joint apart, clean and regrease.

Make sure it goes back together in the exact same splines or you may need to get the DS rebalanced.