Could use the running sound to identify the wearied bearing?

[Philip Gao]

Here to ask professional guys to find the vibration source:
2012 Ram 1500 4x4 HEMI 5.7
Problem phenomenon:
a vibration come with the running, obviously vibration when the Ram speed between 105~115KM/hour, more than 120km/hour is better
Recently 2 years repair:
1) a new front drive shaft ( but it rarely use in 4x4 mode)
2) two new U-Joint in rear drive shaft, replace the fluid of rear differential, personally diy it, here require disassemble rear differential, really difficult for the big nut
3) two rear pack brake assembly replacement
4) left rear ABS parts (speed ring & sensor)

right now the vibration can be feel in steering wheel and all truck, not serious, do not sure some wheel bearing need replace
Could record the truck running voice, record in different speed, according the noise frequency, to identify some bearing or parts need special inspection?
Thank you and Be in Peace!

 

[NETim]

Tires good? Recently balanced?

 

[Jeepwalker]

Is this vehicle stock or lifted in the front? Oversized tires?

Ideas:
- Start by eliminating tires/wheels as a vibration source, which is among the most common source. Most standard wheel balancers will gladly balance out bent wheels and out-of-round tires. The tech just puts on the weight the machine says. Sure, they might be 'balanced' but a warped or out-of-round tire will still be bent/warped causing a vibration down the road. Tires can have 'hard-spots" and broken cords which can't be seen. Get a good "Hunter Road Force" balance job to uncover tire/wheel flaws if any (Google it). Then stand there and watch the tire tech the WHOLE time, to make sure he's doing it 'right' and looking the tires/wheels over carefully. The machine applies in excess of 1200 lbs of 'road force' as the tire/wheel is spinning which attempts to simulate and uncover on-road flaws. Make sure that lower drum is engaged to the wheel (some lazy techs might skip that step). Then you can feel pretty certain you've eliminated tires & wheels as a vibration source.

- Inspect front suspension for worn tie rod, bad shock/strut or ball joint/s. A worn shock can lead to wheel-hop at road speed. Causes steering wheel vibration. Then your tire goes out of round and must be replaced.
- Inspect front wheel bearings
- Inspect front half-shaft CV's, esp inner CV's for up/down wear
- Re-inspect front driveshaft
- Ensure front diff (if 4x4) bushings good and EPS unit is bolted 'tight'.

.

 

[Philip Gao]

Thank you so much, so kind....
Remember these, change a new set tire first

Blessed have Peaceful heart in the day!

 

[1 MEAN66]

A road force balancer can, as stated, detect these problems, provided the operator knows how to use the balancing machine! You can balance a football - but it does not roll very smoothly!