hopping and vibration

mattl140 · Apr 15, 2015

truck hopps and vibrates does it most at 45 what could cause this I'm thinking shocks they are pretty old and beat. thanks

Arisley · Apr 16, 2015

Wheel balance.

cbf9703 · Apr 16, 2015

Arisley said:
Wheel balance.

This. Dealt with it for a couple years with a set of re-centered hummer wheels that wouldn't balance worth a chit. Finally put different wheels on.

ThreeFitty · Apr 16, 2015

Wheel balance like above or maybe U-joints

littleredstroker · Apr 16, 2015

every time ive had ujoints go out the vibration has come on about 45 mph, the last few I checked felt tight with driveline on the truck, felt tight with driveline OFF the truck , and was only confirmed when I drove it minus the rear driveline, There was a time when i would go through a set of ujoints a year so naturally anytime somene talkes about a vibration @ 45mph thats my first thought

mattl140 · Apr 16, 2015

ok thanks guys i put on some 33s but it still vibrated pretty good before the tires and now it is a little worse with the new tires ill check the joints thanks. maybe they didn't balance the new wheels correctly.

mattl140 · Apr 16, 2015

it almost sound like its grinding when about to come to a stop.

lariat 7.3 · Apr 19, 2015

every superduty i've been in/driven gets bed hop at 45, just a fact of life

lincolnlocker · Apr 19, 2015

lariat 7.3 said:
every superduty i've been in/driven gets bed hop at 45, just a fact of life

my 6.7 is the only one that does it that i have personally drove....

live life full throttle

PsdPullerJr · Apr 20, 2015

Check ball joints too. I chased that problem, new u joints, different tires still did it. Finally after I got enough miles on a set of tires that the drivers front was wearing on the inside I put all new ball joints in and hop went away.

cbf9703 · Apr 20, 2015

lariat 7.3 said:
every superduty i've been in/driven gets bed hop at 45, just a fact of life

I'm glad I don't live your life. LOL

Jomax · Apr 20, 2015

lariat 7.3 said:
every superduty i've been in/driven gets bed hop at 45, just a fact of life

That's not a fact of life. I've driven/had plenty superduties. There's a problem if it hops.

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Jomax · Apr 20, 2015

cbf9703 said:
I'm glad I don't live your life. LOL

Lol

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cbf9703 · Apr 20, 2015

Jomax said:
That's not a fact of life. I've driven/had plenty superduties. There's a problem if it hops.

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Exactly.

Arisley · Apr 20, 2015

The only time my truck hops at 45 is when I am in the throttle really, really hard and hit a speed bump right on a shift.

mattl140 · Apr 21, 2015

just replaced all ujoints and carrier bearing it helped a bit. i did my ball joints last year but ill check. i think my problem are my shocks they are pretty beat and maybe front bearings. how would i check the rear axle bearings? put the back on stands and run it? thanks guys

lincolnlocker · Apr 21, 2015

jack it up and shuck the tire up and down.

live life full throttle

Lethalthreat7.3 · Apr 26, 2015

Does it go away above 45?
Did you keep your driveline balanced/inline. You can incorrectly install a joint off 90* throwing them out of balance which creates a vibration.

Arisley · Apr 26, 2015

Lethalthreat7.3 said:
Does it go away above 45?
Did you keep your driveline balanced/inline. You can incorrectly install a joint off 90* throwing them out of balance which creates a vibration.

Yep, one of the most important tool on a u-joint swap is a red or yellow crayon.

mattl140 · Apr 27, 2015

its inline. the vibrations and hopping kinda clears up around 55 my shocks are pretty bad I'm going to be changing them soon with some bilsteins and some x code springs.