Skip the auto shop - Our mechanics make house calls

Q: Why is my transmission slipping?

asked by on

recently transmission is slipping at 40+mph, runs through other gears fine. trans fluid is full. Serviced on time, no previous problems, strong running engine. please advise? Cannot understand always cared for, never beat on. Will I lose the gear or be stranded roadside?

My car has 184000 miles.
My car has an automatic transmission.

A: This may be a sign of a faulty transmission...

This may be a sign of a faulty transmission control solenoid. As you know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car’s computer activates a transmission solenoid, which directs transmission fluid into the valve body to engage the correct gear. When this is faulty or not working properly, this can cause a delay in gear shifting or in some cases cause the car to not shift at all. I would recommend having an expert from YourMechanic come to your location to take the car for a test drive to more specifically determine the cause for this.

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: Connector that links shift lever to transmission disconnecting

Hello. If the shifter cable is popping off of the transmission selector sensor, then either the end of the cable is worn out or the selector is bad. Most of the time the cable end is where the problem is...

Q: Stalling

Depending on the conditions when the stalling occurs, this may be related to the various loads put on the motor which may indicate a faulty MAP sensor. The Manifold Absolute Pressure (MAP) sensor senses engine load and generates a signal...

Q: Car started vibrating a lot

Hello there. The LX470 does, in fact, take premium gasoline. When a lower octane is used such as 87 unleaded than there is a possibility for the engine to knock. In most cases, the vehicle's computer will adjust to the...

Related articles

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...
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...