Skip the auto shop - Our mechanics make house calls

Q: Shudder or bounce after hitting bump

asked by on

My truck is 2wd with rack and pinion steering, I have a shudder or fast bounce only when I hit a bump at any speed and a slight vibration from 40-50mph. I believe the shudder is coming from the rear. I have installed new quality Moog components in the front: upper control arms, lower control arms, wheel hubs, outer tie rods, sway bar end links, and sway bar bushings. I ve also installed new Bilstein shocks all around. I am a part-time mechanic myself, am stumped by what it could be. I assumed the shocks at first then thought it was the front end. What else could cause this? All part numbers are correct. Please help!

My car has 112000 miles.
My car has an automatic transmission.

Hello there, thank you for writing in. Based off of your details, you may first want to concentrate on diagnosing the speed sensitive vibration at 40-50 MPH because that will be easier to resolve. I would place wireless chassis ears at all 4 corners of the car, probably attaching to the hub/spindle area. Run vehicle at speed necessary to generate the vibration and try to isolate a corner (i.e., switch between the channels and listen at each corner).

If a corner(s) stands out as noisier than the others, see if you have an issue with that wheel/tire assembly. "Imbalance" can easily be hidden (i.e., tire will check out perfectly on balancer but vibrate noticeably) if the issue is a tire defect, abnormal wear or road force related "variation". Resolve that first and see if the symptoms when hitting a bump are reduced or eliminated.

If not, you can use chassis ears as well to diagnose that, although you will have to make many "passes" over a known bump in the road that will create the necessary signal, while switching between the channels on the chassis ears. If you’d like YourMechanic can assist you with this diagnostic by coming to your home or office to inspect the issue.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Shudder or bounce after hitting bump

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: squealing noise when I turn the wheel slightly while driving

Hi there. It may be, play in the wheel bearing hub assembly causing the squeal while turning a little to the left. It could also be, the brake pad wear indicator/sensor touching the brake rotor while turning a little left....

Q: Keyhole damaged after attempted break in.

I would recommend having your door handle/lock assembly replaced by a professional. Most door locks are integrated into the outer door handle but if yours is not than the lock itself is all that will be needed. The technician will...

Q: hello i have a 2000 sierra 5.3 idling high and tranny shifts when its idling high seems like it does it when its warmer weather tu

If I am understanding your question correctly, it sounds like the engine is idling high, but I don't understand the transmission issue you're having. The high idle is most likely an intake manifold vacuum leak at the gasket O-rings. This...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.