'06 Vibration, This is crazy

[EC4145]

Sorry it took me so long to update, been busy. Took it to the dealer and they rotated and balanced tires under warranty. When I left I thought that might have made a slight difference, but now it seems to be back to the new normal. I still am not sure if it is driveline or tire/wheels. Disregard the part above in reference to the "hop". It is not actually hopping, but it seems to me that the back end "wants to start hopping, or bouncing, but it is mainly a vibration. It does do it at low speeds, but not quite as bad. I know this for sure, going down hill at highway speed- when I take it out of gear and coast, it makes absolutley no difference in the vibration, it is still there and just as bad (still seems to be coming from the rear). Would a bad u joint still be vibrating while out of gear? If somebody else drove my truck they might not think it is THAT bad. The main thing is that it was SO smooth before, and is now a WHOLE lot worse now. I wanted to put 285 BFG AT's on it, but have not because it was just so smooth with the Michelins. Appreciate all the help guys!

 

[DPKetchum]

Darn. My friends is going to take his in today or tomorrow. He's already done a road force balance etc. As I stated before he says his was SMOOTH and over a few days developed and then stayed full time. He says he will drop it off,leave it until its SMOOTH like it was OR another truck. Does not want or will not pick up and leave with truck until its repaired. He did FIND his poor fuel mileage,low power issue. Was in Kentucky and said got 10. 5 towing there and gutted on inclines. Finally looked in air box. Said air filter looked like it had been stepped on and crushed was sucked in somewhat. Put in a new one and said now showing 13. 5 towing on overhead,lots more zip and very little down shifting on inclines etc. He's HOT about this vibration issue. Has about 3k on it now.

 

[wcjp]

DPKetchum



A friend of mine had issues with DC on his 06' Liberty. It had a whistle on the freeway. Vehicle was two weeks old when he noticed the problem. He returned it to the dealership twice. The second time he informed the dealership he wouldn't receive the vehicle until problem was solved. The regional manager flew into town to test drive the Liberty. The regional manager returned vehicle to dealership stating noise level is normal for this vehicle. Despite the fact my friend test drove two other Liberty's on the same lot that didn't have the noise. They called my friend to come retrieve the vehicle. When he refused they informed him they would move the vehicle to their used vehicle lot and charge him the difference of depreciation.



He found another dealership that fixed the problem under warranty. Problem was the mirror and faulty windshield trim. Hope your friends dealership doesn't play hardball.

 

[DPKetchum]

They won't. But they aren't engineers eaither.

 

[EC4145]

DPketchum,



What dealership is your friend using? Let us know how it turns out.

 

[DPKetchum]

If he'd stop bitxxx and get it in. Little D. C. store in Commerce Georgia. Said this Thursday or Friday(today)Now Monday maybe he says. I told him if at ALL possable to test drive ANOTHER SAME TRUCK at least 30 miles and compare. He said if IT does it means IT needs repair also. Not a KINDA same truck but THE SAME truck and see if any differance etc. If the dealer has one etc. He says it was fine for 1500 miles or so. I want to drive it also. Just curious to how bad it is and what it feels like. I've been on the OTHER end of vibrations. Use to give me heart burn just thinking of a new model with a vibration at certain speeds/conditions etc. You'd pray it would be obvious knowing it wouldn't be or that the engineers would KNOW what to do and it would be ok afterwards. I've seen this sort of thing in G. M. /Nissan/Isuzu/Mazda/D. C. NEVER has one been easy or a sure thing.

 

[anestech]

Railroad tracks, 45 mph, "felt like it was shaking apart. " That all sounds like Death Wobble to me. It is usually associated with a lift (ie changing suspesion component angles, especially track bar to tie rod angles), but is does happen to bone stock SFA vehicles as well. It is WELL known to the Jeep world.



http://www.off-road.com/jeep/tech/deathwobble/

 

[DPKetchum]

His STILL has a vibration DAYS after the railroad tracks. Thats a LONG death wobble. :--)

 

[cojhl2]

Thought I'd throw in this bit of info,, you prob know it but apparently some don't.



I saw a beautiful big black Dodge Cummins Pickup this evening that had quite a lift kit installed. I looked it over.



The rear axle was rotated backward so the pinion shaft pointed toward the transmission output shaft. I suppose this was done to eliminate some u-joint angle.



Apparently the installer of this lift does not know that:

1) Ujoints must be in pairs and always serve parallel shafts.

2) Must be installed in time (registered).



Failure to follow these rules produce the darndest vibrations!!



(If the U-Joints are CV these rules dont apply. )

 

[CLamb]

Thought I'd throw in this bit of info,, you prob know it but apparently some don't.



I saw a beautiful big black Dodge Cummins Pickup this evening that had quite a lift kit installed. I looked it over.



The rear axle was rotated backward so the pinion shaft pointed toward the transmission output shaft. I suppose this was done to eliminate some u-joint angle.



Apparently the installer of this lift does not know that:

1) Ujoints must be in pairs and always serve parallel shafts.

2) Must be installed in time (registered).



Failure to follow these rules produce the darndest vibrations!!





(If the U-Joints are CV these rules dont apply. )

Those "rules" don't really apply to lifted vehicles if you really look around. Thats how I had to do my jeep to kill driveline vibes. Pinion points straight at the output of the t-case. Just have to make sure you increas the fluid level to keep the pinion bearings oiled .

 

[cojhl2]

It doesn't sound right but I guess experience says it is!! Thanks for the response CLamb.



BTW, the front Ujoint looked about unusable to me. It was in a real bind. The problem with U-Joints is that the output angular roataion is not a constant with the input. I bet that front one jerked hard.



Anyway, again thank you for the response.

 

[DPKetchum]

Up date. friends truck in the shop finally. I was going down the road and there his truck was in front of me with a Tech driving it. He and I chatted breifly. Said he found a VERY ROUGH/loud bearing in the rear of the transfer case. Had it in his hand. Said that the NOISE was gone and MAYBE some roughness but the steering wheel shook back and forth at anything over 45 mph. Was heading back to shop to look further.

 

[DPKetchum]

Another UPDATE. ANOTHER FRONT DRIVESHAFT took care of DRIVELINE Vibration. He's HAPPY now.

 

[TulsaOkie]

had the same thing

had a bad vib.coming from mine, it was coming from a bad u-joint in the rear... Just had a new one pop up from the transmission in 2nd gear, having it replaced this week... big bucks it looks like. After 153,000 in 14 months I guess you can say that I just drive the heck out of it. So far that been all after they finally got my lift pump to work right... ...