Q: SUV sounds like 2 pieces knocking together underneath

asked by on May 25, 2016

My SUV sounds like it's literally falling apart underneath me when I'm driving. It sounds like 2 pieces are knocking together. Can you tell me what this means?

Hi there. There are a number of things that can cause this. The most common causes of noise under this vehicle are loose frame cross members or worn out shocks. If the springs are worn out then the control arm bump stops may be hitting the frame. I typically get under the vehicle and inspect the suspension and steering for worn out or loose parts as there are a lot os possibilities here. If you need to have this looked at, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose this for you.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

How do I read the tachometer?
The tachometer is located on your instrument panel, and tells you how fast your engine is moving, in terms of revolutions per minute (RPM). The tachometer is a semicircle, with a hand that points to a number. This number, times...
Nissan primera p11 won't rev pass 2500 rpm
Hi there. The car sounds like it has gone into limp mode for some reason. I would double check to be sure the MAF (https://www.yourmechanic.com/services/mass-airflow-sensor-replacement) is working properly as this will cause this type of reaction as well. Check to...
my 1991 camaro v6 is getting spark and fuel but wont start
If the EGR valve is stuck open or there is a large vacuum leak(s), that could cause the problem you are having. A severe restriction in the exhaust system could cause this issue. You'll also want to check to be...
Truck wont seem to shift into park.
Since the transmission does shift into park with the shifter disconnected, the problem lies elsewhere. Most likely the issue lies in the shift interlock system. It could be a faulty ignition lock cylinder not triggering the interlock system to allow...
Transmission replacement - 2006 Jeep Grand Cherokee
Hello - yes, you are correct. Both the 3.7l and 6.1l Jeeps utilize the W5A580 transmission. Should be a straightforward swap. Torque converter may be different however (RPM range engagement), check your transmission supplier for details.
2014 Lincoln MKZ has a bumpy ride.
Hello, thank you for writing in. Is this something that has been an issues since you obtained the vehicle? Did this happen suddenly, or possibly gradually over time? If the tires are brand new and properly inflated, the ride should...
Bcm replacement
If you are certain that the BCM has failed and you intend to get one from the junkyard anyway, I would recommend simply giving it a try. If it works, problem solved. If it does not work, it is very...
Will the code po171 effect the emissions test?
Hi Cassi. Thanks for sending us a message tonight. Yes, the P-0171 OBD-II trouble code (https://www.yourmechanic.com/article/p0171-obd-ii-trouble-code-system-too-lean-bank-1-by-andrew-quinn) indicates a lean mixture issue, which will impact the pass/fail of most emissions tests. Depending on where you live, any check engine light or...
Should I keep using high mileage oil?
The term "High Mileage" is a marketing term only and thus has no meaning in Tribology, the relevant science one relies on to measure and evaluate the technical appropriateness of engine oils. I am not aware of any published, public...

Related articles

A Buyer’s Guide to the 2012 GMC Terrain
When When you look at smaller SUVs like the Honda CR-V and the Toyota RAV4, do you wish for just a little bit more space? But then when you look at the larger SUVs like the Ford Explorer or the...
A Buyer's Guide to the 2012 GMC Yukon XL
When When you want a huge vehicle with plenty of luxury inside, you’re probably going to be happiest with the 2012 GMC Yukon XL. Key Features The 5.3-liter V8 engine on this full-size SUV isn’t surprising, but its fuel economy...
GMC Certified Pre-Owned (CPO) Car Program
Drivers Drivers in the market for a used GMC vehicle may want to check out cars under their certified pre-owned program. Many manufacturers have a certified pre-owned (CPO) program, and each one is set up differently. Read on to learn...