Exception in rendering!

Message: window is not defined

ReferenceError: window is not defined
    at new c (/tmp/execjs20161208-85577-1101n9hjs:136:3912)
    at m.mountComponent (/tmp/execjs20161208-85577-1101n9hjs:47:15602)
    at /tmp/execjs20161208-85577-1101n9hjs:49:31860
    at a.r.perform (/tmp/execjs20161208-85577-1101n9hjs:47:12503)
    at Object.a [as renderToString] (/tmp/execjs20161208-85577-1101n9hjs:49:31821)
    at r (/tmp/execjs20161208-85577-1101n9hjs:50:21164)
    at Object.S.ReactOnRails.serverRenderReactComponent (/tmp/execjs20161208-85577-1101n9hjs:32:6073)
    at eval (eval at <anonymous> (/tmp/execjs20161208-85577-1101n9hjs:173:8), <anonymous>:10:23)
    at eval (eval at <anonymous> (/tmp/execjs20161208-85577-1101n9hjs:173:8), <anonymous>:17:3)
    at /tmp/execjs20161208-85577-1101n9hjs:173:8

Q: Auto transmission downshifting to lower gear when decelerating causes the car to lurch. Why?

asked by on

When decelerating through 20 mph the auto transmission downshifts to a lower gear than needed causing the car to lurch like hitting the brakes suddenly. I feels likes downshifting into 1st gear at 20 mph when it should be downshifting into 2nd or 3rd gear.

My car has 115000 miles.
My car has an automatic transmission.

A: This may be a result of low transmission fl...

This may be a result of low transmission fluid or potentially a faulty transmission control module. A faulty transmission control module may cause a delay in acceleration or erratic shifting of gears. 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 components 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. In your case it sounds like you may have a faulty kick down switch causing the transmission to downshift prematurely. I would suggest having a professional from Your Mechanic come to your location to properly diagnose your transmission shifting problem.

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: Radiator fan cycles on once then never again

The cooling fan resistor if near the cooling fan connector on drivers side. The replacement of the high pressure switch for the a/c may fix the fan coming on with the a/c. Have the system computer scanned for codes and...

Q: Filling Windshield Water Tank 100%

Hello. Every dealer and manufacturer will have policies regarding certain things. Typically engine damage will not occur if it is completely filled. I do know that most manufacturers, such as Honda, do not recommend it because if it is filled...

Q: Car dead after leaving lights on.

Oh no! From the looks of it, it is very likely that the lights being left on drained the battery just enough to prevent the starter from doing its job. In most cases a simple jumpstart of the battery will...

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.