Skip the auto shop - Our mechanics make house calls

Q: Car bucks when I put it in reverse and drive.

asked by on

Once I put my car into either reverse or drive, it will buck even if I have the brakes on. I'm assuming it's a transmission problem but I'm not sure what it could be.

My car has 140000 miles.
My car has an automatic transmission.

A: Check your idle speed. If your vehicle is i...

Check your idle speed. If your vehicle is idling too high, it will buck when you engage the transmission. Your idle speed in park should be around 500-600 RPM’s. If you are noticing the RPMs to be higher that usual, then you should have the bucking issue diagnosed by an expert, as the potential causes can range from bad transmission fluid to a clogged fuel filter to a faulty idle control valve.

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: Code P0171. Do I need to take car to dealership to address this problem.

Hey there. It sounds like your throttle body is bad. Check to make sure it's clean and not sticking. Clean the throttle body if necessary and check for loose connections with the throttle body connectors, too. Since you said that...

Q: Truck ran out of gas and will not start.

Hello and thanks for the question. That is a lot of good information you have shared, and its always a good idea to pass along any information that may help the mechanic. However, I would recommend having a mechanic, such...

Q: Car cannot be put in drive, high revving

Hello. Thanks for writing in about your 1995 Buick Riviera. If restarting the engine allows you to get the car running properly again, then chances are that the valve body in the transmission is failing. Over time the body can...

Related articles

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...
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...