Skip the auto shop - Our mechanics make house calls

Q: My car jerks when decelerating from what seems to be 4th gear to 3rd.

asked by on

I just bought this car and when I slow down from 35 mph to about 30, the car will jerk into gear. It is an automatic transmission. I took it to a shop and they said the transmission fluid levels were fine. Is my transmission messed up? What kind of damage can I expect here?

My car has 112000 miles.
My car has an automatic transmission.

A: You need to have the codes scanned by a pro...

You need to have the codes scanned by a professional with a scan tool for the transmission computer. The codes may give you an indication if the sensor is not performing correctly. If it is not a sensor malfunctioning (like a speed sensor), then you likely have an internal issue in the valve body of the transmission. For that, you will need to see a transmission specialist.

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・Save up to 30%

Get a quote

What others are asking

Q: Engine revs but van is slow to kick into gear. There is also some redish fluid sprayed all over the engine. The stick shows full.

SPIII ATF is the correct fluid for your vehicle. The fluid in your transmission may have been over filled. Make sure the fluid level is checked after the transmission is warmed up and driven a while. The fluid will...

Q: Car won't start after driving any distance. I have to let it cool down before I can start the engine again.

It's curious that you don't seem to have a code in the ECM. Usually if you have a malfunction that prevents the car from starting, there will be a code resulting. That being said, it sounds like you may have...

Q: Starter bad and car won't start.

I would recommend that you ask for help from a mechanic, possibly from YourMechanic, who has the diagnostic equipment and experience to check your starting system and determine why your car will not start.

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...