Q: My car is hesitating and shifts hard - could that be a sensor or is the transmission going out?

asked by on

it will slip a little when we start out then on streight out out doing 70 its fine fluid is fine but needs to be changed.woould changing the fluid help sense its dirty?

My car has 2007700 miles.
My car has an automatic transmission.

If the transmission has over 200,000 miles, there might be a benefit to changing the filter and fluid in response to the shifting issues you are describing. Before you do that, though, have a professional carefully check the fluid level (hot and cold) because too little or too much transmission fluid will cause shifting problems. You want to rule out "wrong fluid level" before you try other fixes.

If the fluid level is OK, but it is very old and the filter has never been changed, and you are only experiencing hard shifts, I would go ahead and change it on the small chance that it will resolve the issue. If it doesn’t resolve it, you likely have issues internal to the transmission that will necessitate looking at the valve body and solenoids at minimum and, in the worst case, possibly a rebuild of the whole transmission. If you are also experiencing engine hesitation, that would be due to an ignition, fuel, air induction and/or engine management problem that would require a pretty standard diagnostic routine.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. My car is hesitating and shifts hard - could that be a sensor or is the transmission going out?

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: I have a 2007 GMC Acadia and I'm experiencing a hesitation when I accelerate from a stop.

Hi there. The hesitation would be a communication error with the transmission. Also, if the transmission is low on fluid there could be a hesitation when accelerating. Check the transmission fluid level and make sure that it is full. Check...

Q: The four wheel drive system is not engaging the front wheels

From what you are describing it sounds like you have either a failure in the transfer case or in the front axle actuator. I usually drain the fluid from the transfer case first and check it for metal. If there...

Q: coolant evaporating very quickly

Hello. If the coolant continues to go low then there is a problem with the vehicle. It can be an external leak or the engine may have an internal failure which is causing the coolant to burn off. Since you...

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...
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...
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...