what causes an automatic car not to change gears?
474450
If when you put your vehicle into gear and it won't move, this may be a problem with low transmission fluid due to a leak, the shifter, shifter cable, or it could even be a problem in the valve body of your automatic transmission.
753001
Hard shifting with manual transmission usually has to do with a problem in the gear system or with the clutch. Either one of the parts of the gear system is damaged or it is just completely worn out from too much use.
587524
Another classic sign of a CVT transmission malfunction is a noticeable hesitation for the transmission of the car to engage a gear when you put the gear shifter in “D” or “R.” Issues like low transmission fluid, a loose belt, or a failing clutch pack of an internal transmission seal can cause the delay in gear ...
622778
Delayed Shifting Does your car's engine rev high as the automatic transmission shifts from park to drive or in between driving gears? This is a clear indication of low fluid levels and continued operation will result in a need for major transmission repair.
39294
Automatic transmissions that shift hard, jerk or shake during a shift change may mean your transmission fluid needs changed or fluid level is low. In manual transmission vehicles, abnormal gear shifts could indicate damaged gear synchros, worn clutches or other, more severe issues.
378423
Instead of the one clutch controlled by a clutch pedal, there is a series of clutch plates inside of the automatic transmission that is applied automatically. ... Between the different gear sets, there are clutch packs that, when activated, combine the different gear sets together, thus changing the overall gear ratio.
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["Refusal to Switch Gears. If your vehicle refuses or struggles to change gears, you're more than likely facing a problem with your transmission system. ... ", 'Burning Smell. ... ', 'Neutral Noises. ... ', 'Slipping Gears. ... ', 'Dragging Clutch. ... ', 'Leaking Fluid. ... ', 'Check Engine Light. ... ', 'Grinding or Shaking.']
213214
If you have an automatic transmission vehicle, stalling can be a sign of a malfunctioning torque converter or a torque converter solenoid. ... A problem with the solenoid can also be a reason why a car stalls at idle. Another potential transmission-related cause of car stall is low transmission fluid levels.
811826
A 6-speed automatic transmission uses six different drive gears to give you the best combination of fuel economy and power, as determined by the manufacturer. Since the transmission is automatic, the car determines when it needs to change gears and does it for you--all you have to do is drive the car.
118955
More common in a car with automatic transmission, a grinding or shaking that occurs when the gears change is often a sure indication that your transmission has a problem. Humming, whining, or clunking noises—none are good sounds to hear in your car. Let a local mechanic take a look.
706580
The first culprit to suspect when your vehicle refuses to go into gear is low transmission fluid. Perhaps your fluid is leaking or low, and that may cause your car problems having a smooth gear transmission. ... You should be looking out for the level, smell and color of the fluid. If little, try adding some liquid.
175327
An automatic transmission uses sensors to determine when it should shift gears, and changes them using internal oil pressure. ... On a manual transmission the driver does that by pushing in the clutch pedal, but on an automatic, it's handled by the torque converter.
834611
Semi-automatic cars are a great way for both new and experienced drivers to learn about shifting gears. Unlike manual transmission cars, semi-automatics lack a clutch pedal, making them easier to use. To drive, all you need to do is pull the lever when it's time to change the car's mode or gear.
1015523
This happens because, if the master cylinder and/or release cylinder is damaged or leaks, it can cause loss of pressure on the fluid, this can make the clutch not disengage properly. If the clutch and engine do not disengage properly, the manual transmission will be hard to shift all gears, or fail to shift entirely.
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Automatic Transmission Band Service Usually it means the customer noticed the transmission wasn't behaving normally. ... Even in those older cars, transmission band adjustment was maintenance — something you did before a problem showed up. Once the transmission started acting up, it was generally too late.
335275
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.
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['Low, worn out or burned transmission fluid.', 'Solenoid problems.', 'Worn or broken transmission bands.', 'Clutch problems.', 'Worn out gears.', 'Torque converter issues.']