Q: What would cause my transmission to not shift

asked by on

Transmission is Shifting at all RPMs are high

My car has 228000 miles.
My car has an automatic transmission.

One cause to rule out is low fluid level or a plugged transmission fluid filter. Delayed shifts can also be caused by internal hydraulic leaks in the valve body or failing internal transmission seals found on clutch pack pistons and piston o-rings. External pressure gauge testing can be useful in the diagnosis. Other possibilities external to the transmission include faults in the MAP sensor, throttle position sensor, and vehicle speed sensor. If the faults are external, such as in the aforementioned sensors, of course it will be readily restorable. However, due to the age of the transmission if there are internal leaks, faulty clutches and bands, valve body problems, and the like it will be more cost effective to remove the transmission and rebuild it than address, piecemeal, a variety of deficiencies. If this is the original transmission, it’s near the end of its service life. Rebuilding is no big deal, indeed technically it is one of the easier systems on the car to deal with. If you desire that the shift problem be diagnosed, the recommended service is a shift diagnostic.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. What would cause my transmission to not shift

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: 95 honda accord long crank to get started than runs like a champ what causes that

Hi there. In most cases when an engine sits for a while and is hard to start, it is caused by fuel injectors that are clogged with excessive debris or a dirty throttle body. It is also possible that the...

Q: My car starts i put it in reverse but when i put it in to drive it has trouble moving

The transmission most likely have worn out clutch bands or discs inside the transmission. The bands hold the reverse first band to give you forward gears. I would recommend having the transmission pressure tested first to see if the problem...

Q: Sometimes, the lower gears are slow to shift (high RPM) when starting to drive from being stopped or almost stop 2012 Ford Escape

Hi there, The "slow shift" symptoms you are experiencing may be caused by a malfunctioning transmission internal speed sensor, or by a failing throttle position sensor (which communicates with the transmission controller). Either of these could cause the symptoms you...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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...