Skip the auto shop - Our mechanics make house calls

Q: Truck shaking at steady speeds at about 40 kmph

asked by on

My car has an automatic transmission. I have a problem with the truck shaking at times when I drive steadily at about 40 kmph. At times, it feels as though it has a manual transmission and as if I didn't pressed the clutch--like it is going to die out completely. Therefore, I have to do either downshift to D3 or press the overdrive so that it stops shaking. Other than this, the vehicle runs fine. Do you have any suggestions?

A: Erratic shifting into gears too early will ...

Erratic shifting into gears too early will cause overloading of the engine and the shaking you feel. An engine that misfires under load may miss when at this speed before shifting into overdrive. If the transmission is shifting into overdrive before 40 mph then the vehicle speed sensor or transmission input speed sensor may be giving incorrect readings. Have the engine mounts checked to make sure there is no corrosion or pin and socket problems. A certified mobile mechanic can inspect and diagnose what's causing your truck to shake.

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

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Car shaking while idling.

If the engine shakes a little while driving this could be a fuel or ignition systems malfunction. If not enough fuel is being delivered to each cylinder or if the ignition system is not strong enough to burn the correct...

Q: Master cylinder and clutch slave cylinder replaced

Unfortunately, using the same plastic clutch slave cylinder assembly the vehicle was manufactured with will cause the same results if the vehicle is abused. The plastic part is very strong, but cannot withstand the heat and pressure from hard driving....

Q: Whirring sound coming from engine

Hi there. That is a classic sound of a bad Power steering pump or it may be low on fluid. Over time, the high pressure power steering hoses tend to start leaking and cause the pump to run dry and...

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...