Q: Transmission not shifting properly

asked by on July 31, 2017

My son has a 2008 crown Vic and his rpm go up but when he hit the gas it won't go over 20 Mph his dad says transmission but I'm his mom and I'll be the one fixing it I said change the relays and transmission filter please help me

My car has 201000 miles.
My car has an automatic transmission.

Transmission Fluid Service $125.08 - $496.65 Get a Quote

What you are describing is often a sign of low transmission fluid or 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. This type of problem is amplified any time the transmission is low on fluid creating a drop in hydraulic pressure. I would recommend having a professional from YourMechanic come to your location to diagnose and inspect your vehicle.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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


Experienced Mechanic?

Earn up to $65/hr

What others are asking

Noise in front end when turning left

Any movable suspension component could account for the noise including the strut assembly, strut mount including bearing, ball joint(s), tie rod ends, sway bar links and sway bar frame mounts, control arm bushings and possibly loose brake components. If the...

Clutch pedal goes down without resistance

Hello. If your clutch pedal goes to the floor and won't return up, your clutch master cylinder or slave has failed, or you have a leak. If you can see that the reservoir for the clutch is full, then the...

Electrical or transmission problems with Hummer

Hi there. This vehicle is known for having a history of electrical issues. From the symptoms you are getting it sounds like a bad ignition switch or a failing body control module. Most of the time it is the ignition...

2008 Ford fusion, stalls out while driving

Re-flashing the PCM, or replacing the PCM, is the very last step in a many pages long diagnostic routine for the throttle body. Were all steps in the Ford diagnostic specified for the throttle body actually performed? If not, the...

Throttle Body needs replacing, is cardone re-manufactured 'better' than a 'new' throttle body

When it comes to remanufactured or brand new you are better off in most cases with the new one. The reason the company did not have the remanufactured one in stock is due to there has not been enough old...

Advice on replacing the positive battery cable on a '95 Ford Mustang GT

Yes, definitely replace the cable. It was a design flaw on those, and as they get old, they short out internally. It happens all the time. And don't just get those cheap splice kits and put it in and done....

No leak, still losing tons of oil

It is typical for vehicles with higher mileage to use or burn some oil due to normal wear and tear, however it is abnormal for a vehicle with twenty thousand miles on it to burn through quarts of oil between...

Sputtering and other things - 2004 Ford Taurus

Hi there. Typically the issue you're describing is ignition or fuel delivery related. It could be as simple as a crankshaft sensor that is faulty or as complex as a fuel / air mixture issue caused by a faulty mass...

My car had code 420 pop up and cylinder 1,2,3 misfire , my car was jerking when I drove and had loss of power

Misfires are frequently caused by ignition coil failures, but there are other possibilities as well. Sometimes I might diagnose a misfire by swapping components between cylinders to see if the misfire moves. Anyway, you are probably on the right track...

Related articles

How to Get Ford Dealership Certified
Ford car dealerships offer automotive technician jobs to mechanics who are certified through either the ASSET or the FACT program.
Top 10 PZEV Cars for Eco-Friendly Drivers
Teddy Leung / Shutterstock.com The whole idea of a PZEV (that is, a partial zero-emissions vehicle), seems paradoxical. You’d think it’d have to either be zero-emissions or not in the category at all. But as contradictory as...
The Top 5 Selling Cars in Kansas in 2012
Kansas Kansas sees a varied climate with all four seasons, which means drivers in the area choose a variety of vehicles. In years past, some of the front-runners have included the Ford F-150, Buick and Toyota Camry. 2012’s top five...