Skip the auto shop - Our mechanics make house calls

Q: Why car surges when get in last gear n rpm goes up and down. shift good until last gear

asked by on

Why rpm goes up and down when gets to last gear..

My car has 208000 miles.
My car has an automatic transmission.

A: Automatic transmissions can be tricky. When...

Automatic transmissions can be tricky. When diagnosing them, always start with the simple solutions first. Low transmission fluid can lead to slow and or no shifting between gears.

Check your owners manual for information on checking your vehicles transmission fluid. If you are low, refill and keep an eye on the level. You may have a leak in the system somewhere.

Another component to check without getting incredibly complex is the throttle cable. If the throttle is not responding correctly at certain points, the computer will struggle to demand the correct functions from the transmission.

Doing a scan for diagnostic trouble codes may help guide you to what the issue is. Transmission shift solenoids are another part that may cause these types of symptoms, but come with other symptoms you would have noticed as well.

If you need help with this, I would suggest having a certified technician, like one from YourMechanic, diagnose and service your vehicle at your home or office for an accurate repair.

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 help

It is possible that you have issues with your ignition switch or maybe an intermittent short or open in the wiring. Without electrical testing, there is no way to tell what is causing your concern. I suggest having a certified...

Q: How Long Does Transmission Fluid Last?

The best guideline for when to change automatic transmission fluid comes from the manufacturer of the transmission itself. The owner’s manual for each vehicle provides the recommended mileage intervals for service. Typical recommendations generally range from 30,000 to 60,000 miles....

Q: My gas tank (where I open the lidoor and actually put the gas pump in) is literally detached from the car.

You will need to replace the plastic retainer for the fuel fill pipe. Have a certified mechanic, like one from YourMechanic, inspect the gas cap and order all the necessary parts. They will also help you install it. The mechanic...

Related articles

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
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.