Knocking sounds under 2005 KJ

[Bundu Boy]

Hi All

Just need some thoughts on what may be causing a knocking sound under my KJ.

I am hearing a knocking sound particularly at speeds 60kph + and can feel the knocks through the footwell. It happens mostly when I am accelerating and slacks off when no gas is being applied. It is not a rythmic knocking, but more of a random (yet constant) knocking. The knocking is heard when travelling in a straight line.

I do have a stiffer suspension on the jeep so do feel the bumps in the road more than a standard kj would, but this knocking occurs even on a perfectly flat and smooth road and it seems to slowly be getting worse.

Any thoughts? Propshaft issue perhaps?

 

[Cardhu]

If you don't believe its completely rotational ie all the time, I'm guessing u joint on rear drive shaft. Mine would vib horrible under acceleration and decel. Would remain a little wobbly under cruise. Happened at 80000 km.

go for a drive and check the u joints to see if they are hot / warm. Should be ice cold. Plus its a cheap fix if it isn't but will eliminate it off the list.

 

[Ry' N Jen]

Yes, our KJ too has developed a rather strange knock while driving.
I for the life of me figure what the heck it is.
Being the gimp that I am is making it difficult for me to crawl underneath
and do the trouble shooting to find out what's causing the clunk.
The front drive shaft is brand new as are the U joints. I guess it could be
possible that the "new" front U joint is kaput.
Jen's been under the Jeep but like she says, she's not entirely sure what to look for.

Any guesses as to what area to look at?
Then I can get Jen to be my eyes under the Jeep.

Thanks
Ry'

 

[Ry' N Jen]

Yes, our KJ too has developed a rather strange knock while driving.
I for the life of me figure what the heck it is.
Being the gimp that I am is making it difficult for me to crawl underneath
and do the trouble shooting to find out what's causing the clunk.
The front drive shaft is brand new as are the U joints. I guess it could be
possible that the "new" front U joint is kaput.
Jen's been under the Jeep but like she says, she's not entirely sure what to look for.

Any guesses as to what area to look at?
Then I can get Jen to be my eyes under the Jeep.

Thanks
Ry'

Well, I crippled myself somewhat today crawling under our Rig and found the the problem to our wretched "clunk".
Turns out the bushings in the swaybar end links are completely worn out.