Shake or Vibration Issues

Brakin7 · December 22, 2016

Driveshaft needed balanced. Vibrations gone.

Schmidt152 · December 22, 2016

RT,

Very appreciative of the info you've put on here. I sent both those videos to them last week. Maybe the GM engineer will look at them as well. Sometimes I think "It has to be the tires" and other days I can't make heads or tails of anything. I wish I had a lift so I could at least measure this stuff myself. I have an accurate dial indicator.

Schmidt152 · December 22, 2016

Brakin7

Could you explain your symptoms in detail?

Congratulations on a smooth riding truck!! Notices like this give us hope

07Softail · December 22, 2016

RT,

Very appreciative of the info you've put on here. I sent both those videos to them last week. Maybe the GM engineer will look at them as well. Sometimes I think "It has to be the tires" and other days I can't make heads or tails of anything. I wish I had a lift so I could at least measure this stuff myself. I have an accurate dial indicator.

Many Many Many people have installed new tires with no positive results. It will mask it for a while but I guarantee it's always shaking whether you think it is or not, You don't need a lift!!!. Hahaaa!!!!

RT

EspoMan · December 23, 2016

I had my driveshaft balanced by a professional shop and my truck still vibrates.

07Softail · December 23, 2016

Then check the axles

RT

Dnt · December 23, 2016

show them these videos and ask them if it's still the tires!

https://vimeo.com/194200154

RT

Where did these videos come from and are they available in a longer format? Not long enough to tell much about it..... but looks like it could be a vibration SHAKE source

Edited December 23, 2016 by MyFavTruck

07Softail · December 23, 2016

1 was from performance trucks and the other was from this site. Long enough to see problems with both. I fixed my drive shaft and will be checking axles next but My vibration is gone after the driveshaft was trued. Look at the bottom plane on the drive shaft and then look at the outer edge of the axle flange.

RT

EspoMan · December 23, 2016

Then check the axles

RT

I will do that next. Thanks. If it was the axle flange, wouldn't I feel the shake all the time? Mine does it at 45mph exactly and between 72-85.

Thanks

07Softail · December 23, 2016

Not necessarily. My driveshaft was not true from factory like the video above and my truck vibrated between 60-70 mph.

RT

randrball · December 23, 2016

My vibrations are now gone to, but it took replacing the rear ring and pinion. I went from 3:08 to 4:10's.

EspoMan · December 23, 2016

Hey guys just a thought. Would it be possible to lift the truck up on a lift, all four wheels off the ground, bring the truck up to speed, get underneath the truck and try and see if anything sticks out as the source of vibration?

pickmeup · December 23, 2016

Makes me wonder if GM has or does any quality control checking of parts and sub components. How else can you explain all the different parts and components that people report got changed and helped some but not all. It appears it might be tires, driveshaft , axles , torque converter,motor mounts, cab mounts,shocks and the list goes on.

07Softail · December 23, 2016

My vibrations are now gone to, but it took replacing the rear ring and pinion. I went from 3:08 to 4:10's.

That's a helluva jump in gearing! Hahaa I bet it runs like a bat out of Hell now! How tall are your tires and what RPM's is it showing at 80 mph?

RT

Knightfall · December 23, 2016

Has anyone tried running a lower than normal air pressure? I've noticed most of us on here like to run higher tire pressures for loads, mpg's, stuff like that. Maybe if we run factory pressure or little lower than factory that'll smoothen the ride....