Skip the auto shop - Our mechanics make house calls

Q: Sounds as if the car is not going into gear. I have RPM reading odometer, not sure what it should be reading when driving on freeway.

asked by on

I have had this car since June. I replaced the tires (4 new) and also car seemed to be quieter when I got it. Now it sounds as if the car is running louder and it doesn't sound like it has shifted into drive....no indication light is on to determine engine needs service ...RPM's not sure how it should read while driving..example: going 70 miles per hour on freeway...should it be on 3?

My car has 87676 miles.
My car has an automatic transmission.

A: Hello and thank you for contacting YourMech...

Hello and thank you for contacting YourMechanic. Watch the tachometer (rpm gauge) as the vehicle is in motion. When driving, you should see the tachometer go up and then go down a little when the transmission shifts gears. For 4 cylinder engines with a 4 speed transmission, the RPM’s will be at 3,000 when driving at 70 mph on the highway. This is a normal condition for your vehicle and you should be okay. If you are very concerned about the noise or begin experiencing drivability problems, have a professional, like one from YourMechanic, diagnose the car sound and determine if any adjustments are needed.

Was this answer helpful?

A: Tires are a big contributor to road noise. ...

Tires are a big contributor to road noise. It is very difficult to determine how quiet or loud a set of tires will be. Your new tires could certainly be the culprit in this case. If not the new tires, it could be something else, but if there is something wrong, outside of noisier tires, most people would recognize a more localized noise.

As for the transmission question, the 3 indicates 3000 RPM (revolutions per minute). This would be about right at 70 mph. In addition, the fact that you reached 70 mph means the car is indeed in drive. The question I have for you is, are there lights on the dash that indicate the gear? When you first put the key in the ignition and turn it on without starting it, all the warning lights on the dash should turn on. This is a bulb check to be sure all the bulbs that need to be working still are. If you do this and your gear indicator is not illuminating, there is a bulb problem. With your Aveo, it could be an illumination bulb as well.

From what I can tell with the information provided, there may not be anything wrong. If you are uncertain, I recommend having the noise inspected at your home or office by one of our mobile technicians.

Good luck!

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: 2011 impala speedometer up & down while idling, car cuts off at low lidle

I think you mean that the tachometer is going up and down, not the speedometer. If the tachometer is going up and down and then the engine stalls, it's an indication that the engine has a major vacuum leak...

Q: The thermostat has been replaced in my car twice in six months because the Service Engine Light keeps coming on

The thermostats on this engine have an electrical heater element intended to help the engine warm up faster. Many thermostat housings for this engine are plastic - from different suppliers. The plastic housings tend to leak around the heater wire...

Q: Car shakes when brakes applied

The shaking when the brake pedal is pressed is most likely caused by your brake rotors; you may need to have them replaced, as well as your brake pads. I recommend having a certified mechanic, such as one from YourMechanic,...

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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.