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Old 04-02-2015, 11:20 AM   #15
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I have a 12 JK Wrangler. No troubles. Has LSD diffs.
Is they key on?
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Old 04-02-2015, 12:17 PM   #16
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Originally Posted by Twoflyrodders View Post
Thanks forhe suggestions.
This has a stowmaster tow bar and base plate setup and a Airforce braking system. No front limited slip and no auto hubs (full time 4wd disengaged before towing). The GoPro setup would work if I could make it occur - but it might take 1000 miles before it happens.....
Could the full time four wheel drive that is disengaged be somehow trying to reengage?

I had a nasty wobble on a Ford F350 that was finally traced to the front hubs. The hubs were locking and unlocking on their own. Not the same thing of course but this issue seems so close to what I ran into.
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Old 04-02-2015, 12:32 PM   #17
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Redridge mentioned the front rotors

I had a Ford some years back that would overheat the front rotors due to dragging (not fully released) it would start to vibrate like the front tires were flat, I would pull over and stop then it was good to go. Next time it happens touch both front rims (carefully), might be your problem, mine was very intermittent, took a long time to figure it out. Ford did something under warranty.
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Old 04-02-2015, 12:36 PM   #18
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Not sure this is your problem but what you are describing is "Death Wobble" which is common to lifted Jeep Wranglers and many other vehicles with a live axle in the front. Not common with what you have but I suspect the causes are the same and that is misalignment and a loose part in the front steering or suspension somewhere. If allowed to continue it will destroy something.
I had experienced the exact same hurendeous thing in my Dodge Ram 3500. I would have swore the wheel was coming off the front, didnt stop till I got pulled to the side of the road. A pot or or series of bumps would set it off. Happened several times and it ended up being a bad steering stabilizer.
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Old 04-02-2015, 01:08 PM   #19
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Thanks for the inputs. This vehicle has independent front suspension so the older Jeep models problems are different I will having someone inside the Jeep yank on the wheel while I'm towing it - that should simulate striking an object in the road which seems to have contributed to the shaking occurring.
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Old 04-02-2015, 01:18 PM   #20
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Thanks for the inputs. This vehicle has independent front suspension so the older Jeep models problems are different I will having someone inside the Jeep yank on the wheel while I'm towing it - that should simulate striking an object in the road which seems to have contributed to the shaking occurring.
If and when you kind out what is causing the problem, PLEASE post it back in the forum so that the rest of us towing a '14 or '15 Cherokee can benefit from your experiences. I'm in the process of setting ours up and now have something else to worry about.
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Old 04-02-2015, 01:21 PM   #21
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You said the geometry is correct...so the tow bar is level? Does this happen when you are applying the brakes or deccelrating? Does it ever happen while you are under way - maintaining speed or accelerating?
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Old 04-03-2015, 09:30 AM   #22
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Tow bar is level. Seems to occur when maintaining speed or at lower speeds (under 25 MPH) NOT when braking that I can tell, although once it commences it continues while braking to a stop.
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Old 04-03-2015, 10:29 AM   #23
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I had the same problem a few weeks ago while driving my lifted off-road vehicle. An alignment shop that works on lots of off road vehicles told me that 90% of the time the problem is in the tires. I had mine rotated and re-balanced and the problem is gone.
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Old 04-03-2015, 10:43 AM   #24
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Tow bar is level. Seems to occur when maintaining speed or at lower speeds (under 25 MPH) NOT when braking that I can tell, although once it commences it continues while braking to a stop.
Ok, I assume the transfer case is in neutral and transmission is in 'Park'. The fact that it may take a 1000 miles before it happens again and typically happens when you hit a small bump makes me wonder if the caster is right on the edge of being within specs and everything is ok until you hit that small bump in the road. But it seems like it would be worse at fwy speeds rather than ~35mph. Maybe the within spec caster is not enough? Hvae you had that checked?
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Old 04-04-2015, 06:05 PM   #25
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Dealership realigned last week. Per Jeep's instructions after I told them of the problem. Caster was out of spec, as was toe in. Now it remains to see - in July - if the problem still exists.
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Old 04-18-2015, 09:47 AM   #26
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I think I know the issue you are having. I tow a Chevy Equinox behind a DP using a Blue Ox tow bar and a NSA inertia braking system. The hook up is the same that I used with a previous Tahoe toad. Never an issue with the Tahoe. Different story with the Equinox. As with your experience, occasionally when coming out of a turn the car will start jerking from side to side (as witnessed in the rear view camera and observed by a friend driving behind me). On several instances I had to completely stop and go back to the car and straighten the wheels on the car to align with the track of the MH.

For reference, the car only has 10,000 miles on it so I feel pretty confident that the car parts are functioning properly. Two items came to light when evaluating the problem. One, the steering on the Equinox is easy and appears to have a light footprint. The other issue is the mating of the parts of the tow set up. The receiver hitch connection on the MH and with the NSA braking system there is another female receiver connection where the Blue Ox tow bar connects to the braking system. That gives me two very loose connections allowing movement side to side and vertically.

Solution: I read in a travel magazine, FMCA, I think, that mentioned a clamp to be placed on the tow bar to eliminate the movement. I got it from Blue Ox, I think it was about $60 +/-, because of using the NSA braking system I needed another clamp for that portion of the towing system. I got it from NSA and it is called a De-rattler. With both of these installed, I have towed about 3000 miles and so far I have not had any of the previous jerking issues.
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Old 04-19-2015, 12:42 PM   #27
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Good thoughts. I just rechecked the hookup - no looseness at all at the receiver so the clamp won't do it. Alignment is about 1" drop from motorhome to Jeep. That's not supposed to be enough to matter, although a previous writer mentioned that any upward lift when towing would exacerbate any tendency there was to wobble. If my fixes thus far don't do it I will try a 2" or 4" drop receiver adapter next. We'll see this summer.
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Old 04-19-2015, 01:13 PM   #28
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Dealership realigned last week. Per Jeep's instructions after I told them of the problem. Caster was out of spec, as was toe in. Now it remains to see - in July - if the problem still exists.

This, most likely, was the cause of your problem. When you are towing the power steering is not pressurized thus no dampening on the front wheels.

It is essential to have as much positive caster as possible put into the front end alignment. Caster is the alignment setting that most affects vehicle stability. The condition you are experiencing is called "bump steer". Normally this is dampened by the power steering, but without the dampening the wheels oscillate left and right. High positive caster settings helps prevent "bump steer".
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