Why Your Car Won't Go Into Gear: Common Causes and Solutions

Many drivers immediately assume it's a transmission problem, but there can be other reasons behind this issue. It's important to have your car properly diagnosed and resolved by professionals at an auto service center. In this article, we will explore the major reasons why your car won't go into gear and provide you with solutions to address these problems.

Transmission Fluid Issues

One of the primary causes of a car not shifting gears is an issue with the transmission fluid. The fluid level may be either too low or too high, which can lead to difficulties in shifting gears. If the fluid level is low despite regular maintenance, there may be a leak. On the other hand, excessive transmission fluid can cause gear slippage. Additionally, dirty or burnt transmission fluid can also prevent your car from going into gear smoothly.

To fix this issue, you should check the transmission fluid and determine if it needs to be changed. You can assess the fluid by its color, smell, and consistency. If the fluid appears blackish and smells like burnt fluid, it's a clear indication that it should be replaced immediately.

Malfunctioning Shift Lock Release

In automatic transmission cars, the shift knob is locked when the vehicle is parked, and it is released only when the driver's foot is on the brake and the engine is started. This is to prevent accidental gear shifts in the absence of the driver. However, in some cases, the shift lock may get stuck and fail to disengage properly, resulting in the car's inability to shift gears. Most modern cars with automatic shifters have a "shift lock" or "shift release" switch located near the shifter. It might be hidden under a small trim piece that can be removed with a screwdriver or key. By using the key to release the lock, you can shift into drive.

If you encounter a stuck gear shift, you can attempt to bypass the shift interlock solenoid. Start the vehicle and maintain pressure on the brake pedal as you shift into reverse or drive. For more detailed instructions on how to perform this bypass, refer to the guide for a car gear stuck in park mode.

Clutch Failure

In manual transmission cars, a leaking hydraulic fluid in the master cylinder can cause gear shift issues. The master cylinder is responsible for translating the motion of the clutch pedal into the movement of the vehicle. When the clutch pedal releases and engages the clutch, the master cylinder uses hydraulic fluid to function. Even a small leak in the fluid can cause the clutch pedal to stop functioning properly, resulting in the car's failure to go into gear. Another sign of a bad car clutch is when the clutch pedal falls to the floor or requires excessive pressure.

To fix a malfunctioning car clutch, it is recommended to consult a professional mechanic. They will assess the issue, replace any worn components if necessary, and ensure proper clutch operation for optimal vehicle performance.

Torn Shift Linkage Wire

The cables and wires in your car can sometimes get pinched off or ruptured, especially when they rub against the sharp metal edges of the car's frame. If the linkage cable to the clutch is broken off, your car won't go into gear, regardless of the type of transmission. Different situations can indicate the condition of your shift linkage wires:

- Inability to shift gears entirely: This could suggest a potential break in your horizontal shift cable.

- Ability to shift only into 3rd or 4th gear: This may indicate a potential issue with your vertical shift cable.

- Shifting gears without affecting transmission: This situation might point to the possibility of both cables being broken.

If you suspect a severed linkage cable, you may need to go underneath the car or locate the linkage in the engine bay to assess the situation. Trace the linkage from the shifter to the transmission and ensure all components are securely connected and free from visible wear or damage. Merely reconnecting the parts may not be sufficient, as the linkage may require replacement parts or adjustments for proper functioning. We recommend getting your vehicle inspected by a professional mechanic to address this issue.

Bad Torque Converter

Various internal components in automatic transmissions can go bad, causing problems with shifting gears. The pump, stator, and turbine in a torque converter can become faulty and lead to slipping when shifting gears. It is crucial to inspect these elements, as they can potentially prevent the transmission from shifting altogether. Regular maintenance of the automatic transmission can also help resolve minor problems that affect gear shifting.

Fixing a faulty torque converter is a complex task that often requires expertise and specialized equipment. Therefore, it is advised to have this issue fixed by an auto expert.

Failed Clutch Packs

If you own a vehicle with an automatic transmission and encounter issues with your clutch pack, your car won't go into gear when the engine is running. Signs of clutch pack problems include transmission slippage, where the engine revs without a corresponding increase in vehicle speed during gear shifts, or difficulties in getting your car moving after coming to a stop.

To address this problem, it is necessary to enlist a skilled mechanic for the replacement of the clutch pack. Both plates and disks should be replaced to maintain uniform quality and wear across these components.

Misaligned Gearbox

Manual transmissions are more prone to misalignment issues, which, if left unattended, can lead to complete gear failure. Misalignment can occur due to factors like thermal expansion or other underlying problems such as imbalanced transmission fluid or clutch issues.

To fix a misaligned gearbox, you may need to adjust the clutch slightly or replace the worn clutch plate. However, a faulty gearbox might require the replacement of some worn-out car parts.

FAQ

Q: Why does my car jerk when shifting gears in automatic transmission?

A: An automatic car may jerk when shifting gears due to low or dirty transmission fluid, slipping clutch packs, or other issues. Ignition problems can also cause the engine to run rough, resulting in jerks during gear shifts. It is recommended to consult an automatic transmission specialist to diagnose and fix these problems.

Q: Why does my car turn off when I switch gears?

A: If your car turns off when you switch gears, it may be due to a broken or bad torque converter. When the torque converter fails, the vehicle can't maintain enough power at low speeds or when idle, causing the engine to shut off.

Q: Why is my automatic transmission not changing gears?

A: There are several reasons why your automatic car may not shift gears, including a malfunctioning engine control module, bad internal connections, worn-out sensors, or faulty solenoids. It is advisable to have your car checked by an experienced mechanic who can diagnose and repair issues with the electrical system.

Q: My car won't move in gear in an automatic transmission. What could be the problem?

A: If your car won't move in gear regardless of which gear you try, it could indicate worn clutches. Broken clutches can make the transmission unresponsive. Another possibility is that the transmission gear is stuck in two gears simultaneously, preventing movement. Additionally, the shift mechanism itself can malfunction, preventing you from putting your vehicle into gear. Regular maintenance and prompt repairs can help avoid these issues.

In conclusion, when your car won't go into gear, it can be frustrating and potentially dangerous. By understanding the common causes and implementing the appropriate solutions, you can ensure that your car's transmission system operates smoothly. Regular maintenance and timely car repair are essential for preventing gear shifting problems. If you encounter any issues beyond repair, it may be worth considering buying a used car in the UAE. Stay informed about different car parts, their functions, and repair guides by following UAE's top auto blog.