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07-11-2017, 03:22 PM
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#1
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Senior Member
Join Date: Jan 2017
Posts: 177
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Violent shaking on 6% grade
Coming out of Denver on I-70 I started down that first 6% grade and was trying to apply a light brake (3 bars) and truck and trailer shook violently.
I had a 6% grade. 2 days ago and I had no problems.
What could cause this. I had the front alignment. Checked last week, tpms on truck and trailer indicated all was ok.
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07-11-2017, 03:26 PM
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#2
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Senior Member
Join Date: Mar 2012
Posts: 805
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What is your tow vehicle? Plenty of Ford threads out there describing a death wobble.
__________________
DYNAMAX 2016 FORCE HD
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07-11-2017, 03:29 PM
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#3
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Senior Member
Join Date: May 2016
Posts: 1,363
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Quote:
Originally Posted by houstonstroker
What is your tow vehicle? Plenty of Ford threads out there describing a death wobble.
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Boy, what a leap.
Next to know info and you jump to that? LOL.
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07-11-2017, 03:30 PM
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#4
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Senior Member
Join Date: Jan 2017
Posts: 177
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I thought my signature line was showing.
Truck is a 2011 GMC 2500 HD Duramax pulling a 2013 356 Puma toy hauler.
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07-11-2017, 03:31 PM
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#5
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Senior Member
Join Date: Oct 2015
Posts: 364
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Taking a wild guess here, but sounds like warped rotors on your TV.
__________________
2017 Rockwood MiniLite 2506S
2022 F250 7.3/4.30
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07-11-2017, 03:35 PM
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#6
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Senior Member
Join Date: Mar 2015
Location: Frederica DE
Posts: 1,223
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Quote:
Originally Posted by 325BH
Boy, what a leap.
Next to know info and you jump to that? LOL.
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Right! I don't think the term "death wobble" has ever been mentioned on a RV Forum.
__________________
2016 Ford F250 XLT 4X4 6.2L
2015 Rockwood Signature Ultralite 8329SS
Hensley Arrow
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07-11-2017, 03:48 PM
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#7
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Senior Member
Join Date: Sep 2016
Location: Harrison ar
Posts: 107
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Quote:
Originally Posted by bshort
Taking a wild guess here, but sounds like warped rotors on your TV.
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That would be my first guess as well.
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07-11-2017, 03:49 PM
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#8
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Senior Member
Join Date: Jan 2017
Posts: 177
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Quote:
Originally Posted by bshort
Taking a wild guess here, but sounds like warped rotors on your TV.
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May be but under 45 mph or on fairly flat I don't feel any anything just smooth when I apply brake
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07-11-2017, 03:51 PM
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#9
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Senior Member
Join Date: Jan 2017
Posts: 177
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Quote:
Originally Posted by uhduh camping
Right! I don't think the term "death wobble" has ever been mentioned on a RV Forum.
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I had this on a motorcycle and that is exactly what my first thought was.
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07-11-2017, 04:03 PM
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#10
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Senior Member
Join Date: Mar 2012
Posts: 805
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Well now since his truck did not show up in his signature I was just guessing. The dreaded Death Wobble for Fords has been around quite awhile. I have an F250 but have never encountered the dreaded wobble. If you Google Chevy and death wobble, it appears that this also effects Chevies. Mostly it has to do with some loose of bad steering parts. I dunno maybe something is loose and the down hill jaunt made it worse. Google Death Wobble and see if it fits. There is even Youtube videos, go figure.
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DYNAMAX 2016 FORCE HD
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07-11-2017, 04:06 PM
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#11
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Senior Member
Join Date: Sep 2010
Location: Eastern Ontario
Posts: 4,167
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Maybe just a bad hill with ripples in pavement....
__________________
Fonzie
2011 Rockwood 8319SS with ProPride 3P hitch/GoodYear Marathons/TST TPMS 507
2019 F350 Ruby Red 6.7l diesel 3.31 axle electronic locker
Yamaha 3000iseb generator:Progressive Ind. EMS-HW30C : Eastern Ontario
Nights Camped: 2014 (18) 2015 (18) 2016 (36) 2017 (32) 2018 (42) 2019 (28) 2020 (35)
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07-11-2017, 04:06 PM
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#12
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Senior Member
Join Date: Mar 2012
Posts: 805
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And guess what, I'm a member on the RV.net board and if you search death wobble you get two pages worth of reading.
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DYNAMAX 2016 FORCE HD
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07-11-2017, 04:08 PM
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#13
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Senior Member
Join Date: Feb 2015
Location: Southern, IL
Posts: 3,272
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Quote:
Originally Posted by uhduh camping
Right! I don't think the term "death wobble" has ever been mentioned on a RV Forum.
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Somebody call? Lol... My money is on warped rotors.
__________________
Bob & Michelle
2016 Ford F-250 Lariat 4x4
2017 Flagstaff Super Lite 526RLWS
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07-11-2017, 04:09 PM
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#14
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Senior Member
Join Date: Jan 2017
Posts: 177
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Quote:
Originally Posted by houstonstroker
Well now since his truck did not show up in his signature I was just guessing. The dreaded Death Wobble for Fords has been around quite awhile. I have an F250 but have never encountered the dreaded wobble. If you Google Chevy and death wobble, it appears that this also effects Chevies. Mostly it has to do with some loose of bad steering parts. I dunno maybe something is loose and the down hill jaunt made it worse. Google Death Wobble and see if it fits. There is even Youtube videos, go figure.
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Thanks, t chevked lug nuts on both and want see any sign of any seal failure
I would have thought the folks that checked the alignment would have caught OT.
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07-11-2017, 04:10 PM
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#15
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Senior Member
Join Date: May 2017
Posts: 316
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Actually I've seen pretty violent death wobble on an older motorhome, so RVs are not immune 
Technically speaking, warped rotors pretty much don't happen. What causes the pulsating brake feel is uneven wear and/or uneven material transfer from the pad onto the rotor. The weird thing is that it can show more or less depending on brake temperature and pedal pressure. A few years back I had a Grand Cherokee that did vibrate and shake under light braking on a long downhill but had never any problems when braking normal or hard.
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07-11-2017, 04:11 PM
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#16
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Senior Member
Join Date: Jan 2017
Posts: 177
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Quote:
Originally Posted by fonzie
Maybe just a bad hill with ripples in pavement....
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Actually it was fairly new resurface and nice and smooth
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07-11-2017, 05:30 PM
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#17
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Member
Join Date: Apr 2017
Posts: 75
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Check your u joints, that is what my semi did. U joint just starting to dry up, worth a try!
__________________
Tbd
2020 Trailhawk toad
Semper Fi
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07-11-2017, 05:37 PM
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#18
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Senior Member
Join Date: Jun 2017
Posts: 297
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As stated there is no such thing as warped rotors/drums. It just dont happen.
From my experience that vibration you felt was most likely from the rear brakes/drums.
I would say from getting overheated and the rear brakes may be over adjusted.
over adjusted the rears grab before the fronts and dragging them down a 6% it would rear its ugly head like you experienced..
Just my opinion though.
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07-11-2017, 05:38 PM
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#19
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Senior Member
Join Date: Jan 2017
Posts: 177
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Quote:
Originally Posted by Pillboxmc
Check your u joints, that is what my semi did. U joint just starting to dry up, worth a try!
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I will go take a look at them
Thanks
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07-11-2017, 05:42 PM
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#20
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Senior Member
Join Date: Jan 2017
Posts: 177
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Quote:
Originally Posted by Lawrosa
As stated there is no such thing as warped rotors/drums. It just dont happen.
From my experience that vibration you felt was most likely from the rear brakes/drums.
I would say from getting overheated and the rear brakes may be over adjusted.
over adjusted the rears grab before the fronts and dragging them down a 6% it would rear its ugly head like you experienced..
Just my opinion though.
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Its worth taking a look at when I get on level ground
Thanks
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