Pulsing/droning vibration at highway speeds (2 Viewers)

[cDan]

of course those are extreme angles to say the least, but i understand the concept. I raised the frame/body at the rear, about 1in which gave me about 1-2deg more down angle on the rearend.....it's about as straight as it's going to get. Going for a test drive today, i'll let you know what happens. Next step.......take the driveshaft to the shop on monday.
dan

 

[cDan]

of course those are extreme angles to say the least, but i understand the concept. I raised the frame/body at the rear, about 1in which gave me about 1-2deg more down angle on the rearend.....it's about as straight as it's going to get. Going for a test drive today, i'll let you know what happens. Next step.......take the driveshaft to the shop on monday.
dan

just finished a test drive......still doing it. To the shop monday. I will advise.

 

[ntsaint]

Subscribed

 

[dnp]

Subscribed

me too

 

[ntsaint]

Bolted the "whats this thing bolted to my frame" thing back onto the truck today. Will hit the highway later and report back.

Also tightened down the sliders, which had loosened some.

 

[ntsaint]

Three highway trips at varying speeds from 60-80. Drone is GONE. The weight thing on the frame did it.

 

[Sandroad]

Way cool. Glad the "mystery" weight solved your problem.

 

[montegofd3s]

Three highway trips at varying speeds from 60-80. Drone is GONE. The weight thing on the frame did it.

Interesting! I wish I still had mine. Maybe make one from a hockey puck?

 

[ntsaint]

Ha, yeah it took me an hour digging around in my shop to find it.

 

[benc]

I have been chasing the same thing down on mine.
Mine started after the 4.88s, its bad at about 65mph.
Here is what I have done so far with no luck.
New oem u joints front and rear, frame thingy bolted back on, drive shaft straightened and balanced and pinion angle corrected with adjustable control arms. And it's still just as bad as ever! I have narrowed it down to the rear but I'm not sure what els it could be, all I can think is the driveline shop didn't get it balanced right. If I take the rear shaft off and drive with just front wheel drive there is no vibration.
Any one fixed this with something I have not tried or have any ideas?
Thanks

 

[marcfj60]

The last 3 posts on here are all from attendees at this year's HIH. I'm a little worried about how bad it's going to be towing my new pop-up to Ouray. The only consolation for me is it's only a 5 -hour drive and only 3 of those are at speeds above 55. A guy in our local club had a 100 for a while that had this problem. He replaced all kinds of stuff to try to fix it. It was one of the reasons he finally sold it and went to the dark side and bought a Jeep. And he is a hardcore Land Cruiser guy, but only old-school stuff now.

 

[benc]

Yep, cruise set at 58, vibe not bad there.

 

[warpdriv]

I can live with the vibration as long as I know that it's something mechanical not shaking itself apart. That said, I would love to know the source of it so I can fix it.

 

[ToHiHy]

Do you have aftermarket rock sliders installed. Just curious? Only I experienced something similar.

 

[benc]

I can live with the vibration as long as I know that it's something mechanical not shaking itself apart. That said, I would love to know the source of it so I can fix it.

That's the prob! Vibrations will start destroying pinion and output shaft bearings.

 

[marcfj60]

I have MetalTec sliders bolted to the frame. But my vibrations became noticeable before the sliders went on.

 

[Xetabur]

I just drove 500 miles in my LC and the droning is annoying as hell. I shifted in to neutral and the vibration is still there. Any LC specialist in the Boone NC area?

 

[4wheelforay]

I just pulled my rear driveshaft after getting a terrible vibration at 70+mph. I had the rear tires balanced and the vibration was reduced but didn't go away. I then had the front tires balanced but there was no difference. I thought I might have messed up the wheel bearing install I just did, but after pulling the driveshaft it is apparent that the rear u joint is trashed, 305k miles and poor maintenance will do that.

After some digging I found this thread and although some of you have different symptoms it seems as though bad u joints are my main problem.

I am having trouble with one part of this job though, and I am looking for answers while I write this up. If I remember correctly some of you have removed your rear driveshaft and driven your trucks to confirm that it is the rear driveshaft that is the problem. Am I remembering this correctly? After attempting to drive my truck with the rear driveshaft removed I got nowhere. The truck moves in low range but not high. Should it move in high? Is something broken? Thanks for your help.

-Robert

 

[benc]

Lock the center diff lock.


Sent from my iPhone

 

[4wheelforay]

Thank you...

Safe to take to highway speed with it locked?