Rear end bounces @ 40-45 MPH - Page 52 - Ford Truck Enthusiasts Forums



6.7L Power Stroke Diesel 2011-current Ford Powerstroke 6.7 L turbo diesel engine
Sponsored by:
Sponsored by:

     
Old 11-03-2014, 09:29 PM
How-Tos on this Topic
 
Last edit by: IB Cristina
See related guides and technical advice from our community experts:

Browse all: Steering and Suspension Guides
Print Wikipost

Rear end bounces @ 40-45 MPH

Reply
 
 
 
Thread Tools Search this Thread
  #766  
Old 09-01-2017, 02:00 PM
Batman7777 Batman7777 is online now
Junior User
 
Join Date: Sep 2016
Posts: 85
Batman7777 is starting off with a positive reputation.
Same here... Is the bounce gone in the 2017?
Reply With Quote
  #767  
Old 09-01-2017, 04:05 PM
GregWork's Avatar
GregWork GregWork is offline
Junior User
 
Join Date: Aug 2017
Posts: 53
GregWork is starting off with a positive reputation.
Quote:
Originally Posted by Batman7777 View Post
Same here... Is the bounce gone in the 2017?
2017 has fully boxed frame and bounce is gone.
Reply With Quote
  #768  
Old 09-01-2017, 06:15 PM
GregWork's Avatar
GregWork GregWork is offline
Junior User
 
Join Date: Aug 2017
Posts: 53
GregWork is starting off with a positive reputation.
Quote:
Originally Posted by rickbrad View Post
Please if you do install the TSB part let us know how much it improves it with the Sulastic Shock. I have the TSB but not the Sulastic. The TSB helps, but it does not eleminate the hop. There are still speeds that the truck exhibits the behavior, but mine cruises quite smooth at 75 mph. Often times I drive my 2002 Lexus with 194K miles on it just because the truck ride is just too stiff. I think the Sulastic might give gains on that order. I look at speed bumps with dread...
Installed the damper today. Have a 500 mile trip tomorrow to test it out. My only concern is that there is zero clearance between the damper and the sulastic shackle. Test drive had no noises or felt issues with rubbing etc. So hopefully it will be fine. Will update after the trip on ride improvement if any.

The damper is basically a rubber gyro like device. Only partial rotation then rebounds.
Attached Images
    

Last edited by GregWork; 09-01-2017 at 06:21 PM. Reason: reduce image size
Reply With Quote
  #769  
Old 09-02-2017, 11:04 AM
Chris Stewart's Avatar
Chris Stewart Chris Stewart is offline
Senior User
 
Join Date: Mar 2012
Location: Warsaw, IN
Posts: 115
Chris Stewart is starting off with a positive reputation.
Quote:
Originally Posted by rickbrad View Post
Is the bounce gone on the 2017? I can't wait to get one, but I will probably get a 2019 in 2020, lol.
Quote:
Originally Posted by Batman7777 View Post
Same here... Is the bounce gone in the 2017?
Quote:
Originally Posted by GregWork View Post
2017 has fully boxed frame and bounce is gone.
Yessir, glad to report the 2017 F350 CCLB has no bounce. She's rock solid!
Reply With Quote
  #770  
Old 09-02-2017, 08:18 PM
rickbrad rickbrad is offline
Senior User
 
Join Date: Sep 2006
Location: Texas Gulf Coast
Posts: 158
rickbrad is starting off with a positive reputation.
Quote:
Originally Posted by GregWork View Post
Installed the damper today. Have a 500 mile trip tomorrow to test it out. My only concern is that there is zero clearance between the damper and the sulastic shackle. Test drive had no noises or felt issues with rubbing etc. So hopefully it will be fine. Will update after the trip on ride improvement if any.

The damper is basically a rubber gyro like device. Only partial rotation then rebounds.
Cool man. Let us know. I can't remember how the damper mounts but maybe it can be slotted and moved away from the sulastic 1/8" or so?

I can't wait to hear what you think of the combo.
Reply With Quote
  #771  
Old 09-03-2017, 03:04 AM
GregWork's Avatar
GregWork GregWork is offline
Junior User
 
Join Date: Aug 2017
Posts: 53
GregWork is starting off with a positive reputation.
Well.....

I'm sorry to say, but this thing is a $500 paper weight. ☹️

It does reduce the hop, but not a lot. Maybe 10-15% by seat of the pants

Not the reduction I had hoped for.
Reply With Quote
  #772  
Old 09-03-2017, 10:49 AM
rickbrad rickbrad is offline
Senior User
 
Join Date: Sep 2006
Location: Texas Gulf Coast
Posts: 158
rickbrad is starting off with a positive reputation.
Quote:
Originally Posted by GregWork View Post
Well.....

I'm sorry to say, but this thing is a $500 paper weight. ☹️

It does reduce the hop, but not a lot. Maybe 10-15% by seat of the pants

Not the reduction I had hoped for.
Yeah, that is my experience. I was hoping combined with the Sulastic you would have better results.
Reply With Quote
  #773  
Old 09-11-2017, 03:59 PM
poorboy08 poorboy08 is offline
New User
 
Join Date: Jul 2017
Posts: 11
poorboy08 is starting off with a positive reputation.
Quote:
Originally Posted by poorboy08 View Post
I just read through about 80% of this thread...WOW!

I recently just purchased a 2014 CCSB F250 6.2l with 18" wheels and 35" BFGs. The truck had 106,000 miles on it and was WELL taken care of. Interior was in excellent condition and my mechanic looked it over very well and it had not been wrenched on or wrecked etc. We took it out for a test drive and I did notice it had a bounce, which both myself and my mechanic blamed on the fairly worn BFG's. After getting the wheel and tire combo road force balanced I still noticed it had the same problem, although the tech that did the balance did say that none of the wheel and tire combos passed the road force balance and he did get them as close as he could without breaking the tire down and rotating it on the wheel.

NOW, as I've been driving this thing around I have been thinking to myself that I have never felt anything like this with an un-balanced wheel/tire and that is when I did a little search on the interwebs and found this thread. What a F @ C K I N G $H17 show!

I'm really hoping I can at least reduce the amount of up and down oscillation at around 45 - 50 mph. I do need new tires...IDK, but this thread has me really bummed.
Update...I just recently purchased some wheels and tires from someone on this site. They are 20" OEM Platinum wheels with the Michelin shoes...hop is gone! I 100% firmly believe that it was the egged shaped BFGs causing vibration and or an odd oscillation which was causing the hop in the rear end.

I understand this might not be a solution for everyone, actually I know it's not, but I just wanted to update my original post for the record.
Reply With Quote
  #774  
Old 09-11-2017, 04:05 PM
don123's Avatar
don123 don123 is online now
Elder User
 
Join Date: May 2006
Location: Massachusetts
Posts: 765
don123 is starting off with a positive reputation.
I'm surprised I don't have any issues with my truck rides great. No bounce at any speed. I'm guessing not all trucks have this problem.
Reply With Quote
  #775  
Old 09-11-2017, 04:34 PM
GregWork's Avatar
GregWork GregWork is offline
Junior User
 
Join Date: Aug 2017
Posts: 53
GregWork is starting off with a positive reputation.
Quote:
Originally Posted by poorboy08 View Post
Update...I just recently purchased some wheels and tires from someone on this site. They are 20" OEM Platinum wheels with the Michelin shoes...hop is gone! I 100% firmly believe that it was the egged shaped BFGs causing vibration and or an odd oscillation which was causing the hop in the rear end.

I understand this might not be a solution for everyone, actually I know it's not, but I just wanted to update my original post for the record.
Sadly, mine already has that...
Reply With Quote
  #776  
Old 09-15-2017, 10:07 PM
Lubbockguy1979's Avatar
Lubbockguy1979 Lubbockguy1979 is offline
Posting Guru
 
Join Date: Jan 2009
Location: Lubbock
Posts: 2,499
Lubbockguy1979 has a very good reputation on FTE.Lubbockguy1979 has a very good reputation on FTE.Lubbockguy1979 has a very good reputation on FTE.Lubbockguy1979 has a very good reputation on FTE.
Mine is some what rougher than my ccswb f250. But i also have airbags and a couple thousand pounds in toolboxes and a flatbed so that migh be the issue as well
Reply With Quote
  #777  
Old 12-06-2017, 12:06 AM
RUNVS's Avatar
RUNVS RUNVS is offline
FTE Chapter Leader
 
Join Date: Jun 2003
Location: Ohio
Posts: 927
RUNVS has a good reputation on FTE.RUNVS has a good reputation on FTE.
While most have the bounce issue in the 40's, I am more like 60-75mph.
It's horrible on the concrete portion of the Interstate!

Now if this works I will be happy to fabricate something but has anyone else tried a frame brace like this? This appears to be forward of the trans case which seems like it would need to be further back. I have a CCLB 6.2L 2012 f350 and if this works I will fab something up for sure. I just installed 35" Dick Cepeks with Bilstein 5100's and while it reduced it, it definitely didn't cure it.

I can buy into the flex in the C-channel - there's a lot of leverage in a frame this long.

Mhatlen: do you have any more information on this? How many bolt holes had to be drilled? What size bolts? If this worked it probably also made your overall ride quality great!

Quote:
Originally Posted by mhatlen View Post
It's a frame issue and it starts at the radius arm hangers on the frame rails. My truck hopped like wild at 40-42 mph. This is the solution guaranteed.
Reply With Quote
  #778  
Old 12-06-2017, 08:21 AM
cangim's Avatar
cangim cangim is offline
Postmaster
 
Join Date: Nov 2003
Location: Utah County, UT
Posts: 3,285
cangim is gaining momentum as a positive member of FTE.cangim is gaining momentum as a positive member of FTE.
I'd be down for giving it a shot
Reply With Quote
  #779  
Old 12-06-2017, 10:13 AM
Batman7777 Batman7777 is online now
Junior User
 
Join Date: Sep 2016
Posts: 85
Batman7777 is starting off with a positive reputation.
Concrete bounce due to concrete road segments is a different problem associated with the taking a bit of a hop on the road segments.


The 40 mph bounce is likely due to wheel or tire run out or out-of-round. Some suggest it's a harmonic effect, others say suspension, etc.


We have seen many attempts with some working and others not so much.


I noticed the biggest improvement when I took the truck to Les Schwab (an entirely different tire store from where I bought them) and had them road force balance again and the problem is nearly gone. This certainly suggests there is a problem with the wheels and or tires.


Watch for tire out-of-round and wheel run-out where the rim has a slight wobble (more likely occurs with inner dually steel rims).


At one tire store, they propped up the rear and while the tires turned at engine idle, we could see the tire to ground clearance change. Opps... Sure looks like out-of-round tires... Goodyear was very very nice and no hassle replaced them.


Truck 2016 F450
Tires: Goodyear G622 19.5
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Rear end bounce at 45 and 65 gdiehl 6.7L Power Stroke Diesel 15 09-07-2017 11:13 PM
Rear end bouncing 02TB250 1999 to 2016 Super Duty 9 07-31-2017 06:54 PM
F450 Owners...have you gone to the edge of the earth to balance your wheels? mmm635 6.7L Power Stroke Diesel 20 02-22-2017 03:30 AM
Truck bounce at 45 mph wkndwrnch 1999 - 2003 7.3L Power Stroke Diesel 19 02-13-2017 02:15 AM
TSB 16-0087 Maxium4x4 6.7L Power Stroke Diesel 0 12-28-2016 09:19 AM


Go Back   Ford Truck Enthusiasts Forums >

Tags
2005, 2011, 45mph, 70, article, bounces, bouncing, bronco, end, f250, f350, hop, hopping, mph, rear, truck

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -5. The time now is 05:49 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: