Single clunk when changing direction NEED HELP. (99 4wd)

[wettRunner]

When I'm backing into a parking spot, i'll turn the wheel and hit the brake, and a loud pop/ clunk happens. Loud enough for people nearby to look over.

I've replaced most of the front end including: (5k miles ago)
- LBJ's
- LCA's
- UBJ's
- UCA's
- Sway bar end links
- ITRE's
- OTRE's
- Steering rack bushings
- Springs
- Top plates
- Shock absorbers

I cant for the life of me think of what it could be.

I can feel it happen on the floor and, in the steering wheel, and it sounds like a metal on metal clunk.

It usually happens once every time I drive, and its always at very low speeds when I change direction. It doesn't happen every time either.

Any advice or discussion is welcomed and appreciated.

Thank You.

 

[hamsandwiches]

Bad half shaft. Can you hear it on a particular side?

 

[wettRunner]

It’s really hard to specify which side it’s coming from. I was thinking cv axles but I figured the popping would be consistent. I’ll try to record it somehow.

 

[KamKoz]

Check the torque on your LCA cam bolts. I have had a very similar sound coming from my driver side that ended up being a loose cam bolt after alignment when my JBA UCAs were installed. Took a good month or two and numerous trips off road before I heard it.

 

[wettRunner]

Check the torque on your LCA cam bolts. I have had a very similar sound coming from my driver side that ended up being a loose cam bolt after alignment when my JBA UCAs were installed. Took a good month or two and numerous trips off road before I heard it.

Awesome. I've had two alignments done and my front wheels are cambered positively pretty bad.

I got greaseable cam bolts so ill check that they are greased and torqued.

Thank you for the reply.

 

[Gary Blake]

There is also a good chance it is the slip yoke in the rear drive shaft binding, this can cause quite a loud bang from the rear end under the circumstances you describe.

Simple fix, four bolts to detach the driveshaft from the rear diff, pull the splined section apart clean and re-grease. Just need to remember to mark the two halves so they go back in the same alignment and to remove the grease nipple to release the suction or you will never get the two halves apart.
[MENTION=120071]mtbtim[/MENTION] (Tim the Toolman) has a video on the fix

Slip Yoke Binding Fix

Gary

 

[redshift83]

I've had this happen too when my rear LCA bolt loosens up. For some reason the driver's side one gets loose after a bit of off-roading and I will get a clunk until i tighten it. It happens when starting off from a stop or switching to reverse/back to forward. It only does it once per direction or until the suspension is moved around and thus the pivot is freed up again. You may want to check all the control arm/ panhard bolts to rule them out.