Whenever I come to a Stop and get on the Brakes a lil more than "Regular", when I let go of the Brakes to Move Forward, it's like something let's Loose, you Feel a lil Thud in the Truck and the Sound of something letting go, then everything is fine.

It's almost as if when you get On and Hold the Brakes, it "Holds" whatever is Loose towards the Rear of the Vehicle. Then when you let Off the Brakes, it "Let's Go" and Moves back Forward.

It's weird to Explain, but if you were in the Vehicle when it Happens, you'd know exactly what I'm Talking about.

But if I Drive down the Road, Rock the Truck Back & Fourth, get on the Brakes but stay Rolling, it doesn't do it. Only when coming Out of a Complete Stop.

I had the Dealer Look at it, and they couldn't Find anything.

Truck only has 15k Miles on it as well, and is NEVER Off Road.

This has got to be a "Universal Problem" because I have been in other Vehicles where this has happened. So it's gotta be 1 Main thing that is Loose or Bad that Causes it.

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'06 KJ CRD-Philips Xtreme Power Headlights/Philips Night Guide 9005 Fogs/Amsoil Air Filter/Swiss Cheesed Airbox/Magnaflow Exhaust/TS MP-8/Gutted Cat.

It's the knuckle in the back of the drive shaft.

Comes as an assembly with all the universal joints, drive shaft and knukle.

If you instead were to buy the Universal joints, drive shaft and knukle separately they would cost over $350 dollars, but for some unknown reason if you buy them as an assembly it only costs $168.00 from Mopar Parts America.com.

Buy the assembly and eliminate the problem.

30 minute install.

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2006 Liberty Limited CRD, Deep Beryl Green, Yeti tune, Arp studs, new cams, rockers, lifters, TB. "Green Monster"
2005 Liberty Sport CRD, Deep Beryl Green, GDE Hot Tune, ARP studs. "Rocket"
1982 Fiat 124 Spider Convertible. "Fiona"

part# 0r pic?on the knuckle?
thought it might be rear ball joint.

Knuckle in the driveshaft? Never heard of anything like this. Details?

Had this same problem. My $15 U-joint back there solved it.

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2005 Stone White KJ Limited CRD 4x4
Off-Road Pkg
Trac-Lok
Emu 790s/948s
Skyjacker H7088s rear/Bilsteins front
15x7 Black Rock Lobos/31x10.50 Firestones
GDE HOT Tune + TCM Tune
Euro TC
CB radio
Thrush Turbo muffler
AEM DryFlow filter

Tried to find the part number by going into my account on Mopar Parts America but they don't show the part number....

But this is what it says:

Ordered on 11/19/09 - OEM Catalog - SHAFT DRIVE - 1 - $163.30 $0.00 $163.30 Status: Sent

and that was for the whole shaft assembly, it included the universal joints and rear Yoke knuckle attached to the drive shaft and sold as an assembly.

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2006 Liberty Limited CRD, Deep Beryl Green, Yeti tune, Arp studs, new cams, rockers, lifters, TB. "Green Monster"
2005 Liberty Sport CRD, Deep Beryl Green, GDE Hot Tune, ARP studs. "Rocket"
1982 Fiat 124 Spider Convertible. "Fiona"

What your discribing sounds like what mine is doing and having owned 3 XJ's I know the symptoms well. The problem on the XJ's is the splines on the slip joint on the rear drive shaft where it fits over the tail shaft on the transfer case needs lubricated The OLDER XJ's have a grease on them

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Atlantic Blue 06 CRD Limited (his)
Joined by a 2000 XJ Classic (hers)

Mine does the same thing. So I can just grease the rear U-Joint and that will solve the problem, or do I need to replace it?

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In this war of lines, so many have been crossed. Where will it all stop?

2006 Deep Beryl Green CRD Sport *SOLD 1/22/12*
Provent, V6 Airbox, Fumoto, Samcos, GDE ECO & TCM Tune, Euro JK TC, Magnaflow Catback
245/70/16 Destination A/T's
Boiler's Radiator Skid Plate
Jeepin' By Al 2.5 inch Adjust-A-Strut Lift, JBA Gen 4.5 UCA's (6/5/10)

So Buy a Whole New Drive Shaft?

This is what I Found, is it Correct: Drive shaft, liberty, 4wd, 2.8l $188.89

The 3 Subcategories are: Drive Shaft / Slip Yoke / Universal Joints

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'06 KJ CRD-Philips Xtreme Power Headlights/Philips Night Guide 9005 Fogs/Amsoil Air Filter/Swiss Cheesed Airbox/Magnaflow Exhaust/TS MP-8/Gutted Cat.

First, I'd put new U-joints in it, and re-grease the splines on the t-case end. That should cure the problem. If not, you are only out $15-30 bucks. Better than throwing almost $200 at it immediately.

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2005 Stone White KJ Limited CRD 4x4
Off-Road Pkg
Trac-Lok
Emu 790s/948s
Skyjacker H7088s rear/Bilsteins front
15x7 Black Rock Lobos/31x10.50 Firestones
GDE HOT Tune + TCM Tune
Euro TC
CB radio
Thrush Turbo muffler
AEM DryFlow filter

It's not your u-joints, it's the slip yoke in the rear driveshaft. Pull it off and grease the splines - problem solved.

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05CRD: GDE Hot ECU & TCM tunes, Provent, Cat filter, Facet lift pump, TransGo kit, Florida TC, Samcos, stainless brake lines, HDS thermostat, Renegade light bar,
RL super sliders, Bilstein adjustables, Al's Gen 4.5 Arms, 235/85-16 Duratracs, DTT rear, Elocker front, EVIC+TPMS, Turbo timer, McNally pillar gauges, Weeks Stage II kit.

I'm so glad you brought this up. We have the same issue. Will grease slip joint first.

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HERS:'16 WK2 Limited EcoDiesel - GDE hot
HIS: '06 Liberty CRD - EHM , GDE eco, Brite Box, Stanadyne FM100, Cummins lift pump, OME lift
'06 Dodge/Cummins - Play truck; a couple of fans, a proper cam shaft, and man handled electrons by EFILive 500/900
'01 Dodge/Cummins - Work truck; Lots of mods

Does anyone have a pic of the slip joint that they could post?

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In this war of lines, so many have been crossed. Where will it all stop?

2006 Deep Beryl Green CRD Sport *SOLD 1/22/12*
Provent, V6 Airbox, Fumoto, Samcos, GDE ECO & TCM Tune, Euro JK TC, Magnaflow Catback
245/70/16 Destination A/T's
Boiler's Radiator Skid Plate
Jeepin' By Al 2.5 inch Adjust-A-Strut Lift, JBA Gen 4.5 UCA's (6/5/10)

I used to grease mine, had to do it once a year. Now, bah, fuggit.

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2006 Sport CRD

Could the Aztecs have known, that in 2012 after a 4 year experiment, our country would cease to exist?

It's under the rubber boot at the front end of your rear driveshaft, just forward of the big metal ring damper. It's held on by two clamps. If you're really careful you can unhook the rear clamp on the rubber boot. Unbolt the driveshaft from the diff, after marking it to reinstall in the same position. Slide the driveshaft off and wipe some grease in the splines. If you were careful you can re-use that clamp on the boot.

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05CRD: GDE Hot ECU & TCM tunes, Provent, Cat filter, Facet lift pump, TransGo kit, Florida TC, Samcos, stainless brake lines, HDS thermostat, Renegade light bar,
RL super sliders, Bilstein adjustables, Al's Gen 4.5 Arms, 235/85-16 Duratracs, DTT rear, Elocker front, EVIC+TPMS, Turbo timer, McNally pillar gauges, Weeks Stage II kit.