Skip the auto shop - Our mechanics make house calls

Q: What would cause a heavy shake when the van is just about to shift under a load? Speed does not matter.

asked by on

This van has new heads (she got it hot, just trying to be thorough) and does not show any codes. but as the van accelerates, like when starting to climb a hill in overdrive, the van shakes like crazy. After it shifts and the RPMs get higher the shake immediately goes away and it runs like a dream. To be clear there is no power loss or miss. It, to me, seems like it is not inside the engine. maybe CV shaft or drive-train. This can happen at any speed but on the route I drove it occurred at 25 mph and 67 mph. I am looking for ideas on where to look before I take this in to get raped.Thank you in advance.

My car has 180000 miles.
My car has an automatic transmission.

A: Hi there: In many cases, the symptoms you’...

Hi there:

In many cases, the symptoms you’re describing can be caused by loose motor mounts, steering stabilizer bars, or other front end suspension components. If the shaking occurs during shifting of the transmission, it could be a harmonic balancer issue or drive shaft that has fallen out of calibration. My suggestion is contact a local mechanic who can come to your home and complete a vehicle is vibrating inspection first. This service will allow them to pinpoint the source of the vibration so that the right repairs can be made; without the guess work.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Car window off track

The window regulator is the mechanism that lifts the glass, and holds it in the tracks. It is comprised of cables and pulleys. If any part of it breaks, the window will usually tilt, and fall of track. Removing the...

Q: Ticking noise from passenger side

Hello, I'm sure the dealership heard the noise however it is a normal noise from a Chrysler Hemi engine. This noise is most likely a lifter rattle or noise where a lifter spring is sticking closed and rattling in its...

Q: Engine misfiring.

A misfire can be caused by a lot of things, from a worn spark plug to an internal engine problem. The first step is to retrieve the diagnostic codes associated with the check engine light. These codes will provide a...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...