About 40k miles ago I replaced the lower ball joints with Moog's, did OME springs and Bilstein shocks. The rig ended up 2" higher but that was not too bad.
Now, when I go over any kind of bump I get a "thunk" noise. Tires are wearing well but before I replace them this front end must be cured.
Time to replace the upper arms with Al's? I am not a real off roader but the roads here in Maine are turning third world very quickly.
Will probably take it down to find out for sure.
Any suggestions?

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'06 Jeep Liberty Sport CRD with: GDE Hot Flash and Tranny Flash, ehm, Cummins fuel pump, 3" Magnaflow muff, Moog K3199's, Skids, 225-75-16 10 ply, OME springs, Euro T/C, Shift kit, Trans cooler w/thermal bypass, Bigboy bkt, Samco CAC, Brake controller, Trans temp gauge, Al's Upper Arms

Before you go spending money on this, check the torque on the nuts on the top of the struts. The left strut nuts are terrible to get to, especially the rearmost one, and perhaps it was never tightened up properly.

Will look and see.

Thanks..

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'06 Jeep Liberty Sport CRD with: GDE Hot Flash and Tranny Flash, ehm, Cummins fuel pump, 3" Magnaflow muff, Moog K3199's, Skids, 225-75-16 10 ply, OME springs, Euro T/C, Shift kit, Trans cooler w/thermal bypass, Bigboy bkt, Samco CAC, Brake controller, Trans temp gauge, Al's Upper Arms

Hi, have you considered broken or loose engine mounts? There are many threads on the issue, try searching for it. The mounts seem to be making trouble for many of us, and not surprisingly, that is not the first place to look for when you hear thunk sound in the front end.

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Liberty 2006, silver, CRD Limited, MOAB wheels Goodyear MTRs 245/75 (summer) 255/70 studded tires on original rims (winter), 30 mm lift, full MOPAR skid plates, tow bar and tow hooks, THULE Pacific 100 luggage box. 33,000 miles.

CJ-2A 1946 Normandy blue, ? miles, 600x16 non-directional, second owner...

I think the plastic bumper is loose.
Whacked a dog and it broke the bumper up.

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'06 Jeep Liberty Sport CRD with: GDE Hot Flash and Tranny Flash, ehm, Cummins fuel pump, 3" Magnaflow muff, Moog K3199's, Skids, 225-75-16 10 ply, OME springs, Euro T/C, Shift kit, Trans cooler w/thermal bypass, Bigboy bkt, Samco CAC, Brake controller, Trans temp gauge, Al's Upper Arms

A good piece of maintenance advice for any driver is to stop whacking small animals...

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2005 CRD Limited Flame Red w/ Renegade rock rails & light bar, AirLift 1000. 225/75R16 MT/R's on cheap black steel wheels, dual MOPAR subwoofers, Ipod kit & seat covers, Samco hoses - totaled and gone. 2008 WK Laredo 3.0L diesel - AirLift 1000, wife won't let me mess with it much. 2013 JK Sahara on order.

I agree with Glend, my crd had just that "thunk" and that was the problem, 2 of the screws (under the hood) above the strut were a half turn loose and every bump I would go over would make this sound. 3 dealers could not figure out the problem. crd's shake a lot and with this shaking screws, nuts, and bolts get loose

2006 Black CRD 4x4
ERG Mod, Nurf Bars

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mestrejr
2006 Black 4x4 CRD Sport
ERG Mod, Nurf Bars, Airbox Mod, Running 5W 40 Amsoil

Happy to have your first comment.
You 2 are probably right..
Trying to scrape pennies together to get the Eco-Mind-Wipe (GDE ECM ORM).
The battery is dying, tires need replacing and that bumper skin is a pain in the gl-ass, winter is coming.
The second dog, the one I hit, took out the windshield wiper sensor. Swerved to avoid the first, the second poor dog was unavoidable.
I replaced the fumoto valve with a new plug because it no longer worked.
Thunk moved to the back, of course I was off road.

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'06 Jeep Liberty Sport CRD with: GDE Hot Flash and Tranny Flash, ehm, Cummins fuel pump, 3" Magnaflow muff, Moog K3199's, Skids, 225-75-16 10 ply, OME springs, Euro T/C, Shift kit, Trans cooler w/thermal bypass, Bigboy bkt, Samco CAC, Brake controller, Trans temp gauge, Al's Upper Arms