Skip the auto shop - Our mechanics make house calls

Q: Accelerating from red light, car jerks; also at 25-35 mph

asked by on

After sitting at a red light, I accelerated and the car jerked; then it was a few seconds before it would accelerate again. It happened again when I was going between 25-35 mph. This keeps happening. I have been to the dealership “five” times and they can't find what is causing this. I was determined so I have gone back, yet again. This time they told me that the transmission should be replaced. Before I agree to that, I would like your professional diagnosis and do you agree regarding the transmission needing replacement?

Hello there. Many different faults can cause the vehicle to jerk and have acceleration issue. The most likely cause of these are spark plugs, battery, alternator, fuel pump, low transmission fluid, MAF sensor, vacuum leak, exhaust leak or oxygen sensor. All of these would need to be ruled out before the transmission was replaced. If the transmission is failing, there will generally be a Check Engine Light that indicates an internal fault within the transmission. A qualified technician, such as one from YourMechanic, will be able to diagnose the jerking issue and perform any repairs required.

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: The car takes about 5 cranks to start and once it does start the car jerks and only idles at about 500 rpm

This is a fuel supply problem. Fuel pressure will be the key indicator for which component of the fuel system isn't performing as needed. Check to be sure the fuel pump relay is good, and the fuel pump is running...

Q: When I press the gas pedal the vehicle misfires

The code P1128 means that the heated oxygen is swapped from the circuitry. Check the wiring on the O2 sensor and check the condition of the O2 sensor. If the sensor is working fine or you have replaced the sensor...

Q: My car pulls to the side when I leave acceleration and when I'm braking. What could be the real problem?

For the vehicle to move to the right as you accelerate, that would be an engine and transmission mount that is either loose, damaged, or broken. For the vehicle to pull as you brake, there could be an issue with...

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 Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...