Q: Car don't seem to downshift

asked by on January 21, 2017

When I drive the car everything seems fine until I get ready to slow down and the car jerks. To me it feels like somethings bout to fall but to a man he say its not downshifting but I would like to know the cause.

My car has 15000 miles.
My car has an automatic transmission.

Hi There, What you are describing sounds like possibly low transmission fluid or a bad speed sensor or potentially a faulty transmission control module, which also controls the speed sensors. The transmission control module has various sensors such as vehicle speed sensors, wheel speed sensors, throttle position sensors, turbine speed sensor, and transmission fluid temperature sensors that all direct information to it in order for it to perform it’s function. Other functions controlled by the TCM are components such as a kick down switch, traction control system, and cruise control module. Any of these may also affect the way the transmission control module performs and controls the transmission and the shifting of your vehicle. A faulty transmission control module may cause also cause a delay in acceleration or erratic shifting of gears. Lastly, this may also be a result of low transmission fluid. I would suggest having a professional from Your Mechanic come to your location to properly diagnose your transmission problem.

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

What others are asking

The car has no power, the ignition relay keeps making a clicking noise, and the car won't start

I suspect you have a dead (or very low) battery, a failed alternator, and an electrical circuitry problem as well. It may be hard to tell which came first if there is wiring damage already. The clicking you hear is...

Engine shaking while in neutral and park

It's possible you may have disturbed a vacuum hose while you were doing the job, check for that first. But I'm concerned about the valves because If you get the valve clearance too tight, it may develop a miss at...

How do you operate the continuously variable transmission?

If your car is equipped with an automatic transmission rather than a stick shift, you actually have what’s called a continuously variable transmission, or CVT. These are a little different from conventional automatics. Here’s what drivers need to know: ...

Engine idle fluctuates

You may have a dirty or failing idle air control valve. The idle air control valve reads the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and at idle. Since...

Had a hole in the oil pan so replaced it. Ever since then the oil filter will spray out oil.

Try checking all of the fittings near and around the oil filter housing as well as the oil pump. Check to be sure the correct O-ring is sealing correctly when the oil filter is screwed on as this is a...

How much to replace all motor mounts on my 2007 honda odyssey exl

sent to CS

where can i take my car

Hi there. It really depends on what type of car you have and where you live. If you live in one of our service areas in the United States, one of our mobile mechanics can come to your location and...

Clutch broke and won't shift into gear.

This could be a symptom of a bad clutch. Another way to test the clutch is to drive down the road, get into 3rd gear and with your foot on the gas pedal push the clutch in and let the...

I am trying to replace the dc converter in my 2006 Honda Civic Hybrid. I bought used one online and put it in but not working.

Hi there. Unfortunately, there are too many variables we are not aware of, including the type of component you are using (OEM or aftermarket), the installation process or condition of the vehicle prior to the service completed to provide you...

Related articles

3 Essential Things to Know About Your Car’s Turn Signal
The turn signal on your vehicle is mounted on the front and back of the vehicle, on both the...
P3460 OBD-II Trouble Code: Cylinder 8 Deactivation/Intake Valve Malfunction
P3460 P3460 code definition The P3460 code represents what’s known as Cyl8 Deactivation/Intake Valve Ctrl Circ Low. Cyl8 narrows the issue down to engine cylinder number 8. Other codes in the P3400 series may present concurrently with P3460, indicating a...
P0094 OBD-II Trouble Code: Fuel System Leak - Small Leak Detected
P0094 P0094 code definition Fuel System Leak - Small Leak Detected What the P0094 code means The P0094 code is set in a vehicle’s Powertrain Control Module (PCM) when it detects a small leak in the fuel system. It is...