Skip the auto shop - Our mechanics make house calls

Q: Rpm going really high and mph going slowly

asked by on

Rmp going high and mph going slower and a big thump sound when it get it second gear

My car has 6600 miles.
My car has an automatic transmission.

It sounds like your vehicle’s transmission is not shifting properly. Check the level of transmission and fluid condition. If the fluid level is low, that will cause shift difficulties. If the fluid is discolored or has a burnt odor, that would reflect an internal mechanical fault. Failures to shift are due to either external control failures, including in some cases engine related controls such as the throttle position sensor, but also including the vehicle speed sensor, transmission control module, and shift solenoids. Many of these issues can be repaired with the transmission in situ. Internal faults can be due to valve body faults, plugged transmission filter and failed piston seals, o-rings, bands, and clutch packs. To identify the problem, the recommended service is a failure to shift diagnostic. Once that diagnostic is complete, the mechanic will explain the repair strategy to you in detail and estimate the cost.

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: Got a tune up. Sputtering during acceleration abd now it won't start. Smell of gas without touching pedal. No interior lights and battery is good

Hello and thank you for your question. Sounds like a couple things are wrong with your car. First there is a crossed wire with the spark plug wires. If only two wires are crossed, then the vehicle will run on...

Q: How can I check to see if my transmission is staying cool

Shift speeds (specified at RPM or vehicle speeds) are specified in the Factory Service Manual so it is possible to determine if your operation is normal or not. You can determine fluid temperature by using an infrared thermometer. Anytime you...

Q: Car not starting

Hello! First I would suggest to have a mechanic check the timing of the engine. To check the timing the technician would use a timing light to see if the timing is within tolerance. Timing chains usually don't develop any...

Related articles

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...
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.