Why is my Dodge Ram not changing gears?

If your Dodge Ram is not changing gears properly, there could be several potential causes. The most common issues include problems with the transmission, the transmission control module, or the transmission fluid. Let's explore these potential problems in more detail.

Transmission Issues

One of the most common reasons a Dodge Ram may not be changing gears is a problem with the transmission itself. This could be due to worn or damaged transmission components, such as the clutches, bands, or gears. Over time, these parts can become worn down, preventing the transmission from shifting smoothly between gears. If the transmission is the issue, you may notice symptoms like delayed or erratic shifting, grinding noises, or the transmission slipping.

Transmission Control Module Failure

The transmission control module (TCM) is the computer that manages the transmission's operation. If the TCM is malfunctioning, it may not be able to properly control the shifting of the gears. This can result in the transmission not changing gears at the appropriate times or not changing gears at all. Symptoms of a faulty TCM include erratic shifting, the transmission getting stuck in one gear, or the "Check Engine" light illuminating.

Low or Contaminated Transmission Fluid

Proper transmission fluid level and condition is crucial for the transmission to function correctly. If the fluid is low or contaminated with debris, it can cause the transmission to have difficulty shifting gears. You may notice the transmission slipping, delayed or erratic shifting, or even the transmission getting stuck in one gear. In this case, the solution may be as simple as topping up the transmission fluid or flushing and replacing the fluid.

Troubleshooting Steps

• Check the transmission fluid level and condition. Top up or replace the fluid if necessary.


• Scan the vehicle for any diagnostic trouble codes related to the transmission or TCM.


• Inspect the transmission for any visible signs of damage or wear, such as leaks or metal shavings in the fluid.


• If the issue persists, have a professional technician diagnose and repair the transmission or TCM as needed.

Addressing transmission issues in your Dodge Ram promptly is important to prevent further damage and ensure your vehicle continues to operate safely and reliably. If you're unsure of the cause or need assistance, it's best to consult a qualified automotive technician.

Why isn't my truck changing gears?

A truck that won't go into gear is likely experiencing a problem with its transmission fluid, clutch/torque converter, or shifter linkage/cable. To diagnose the issue, check the transmission fluid level and condition, inspect the shifter and linkage for any blockages or damage, and listen for unusual sounds. 
Possible causes and what to check
Automatic transmission

• Low or dirty transmission fluid: This can prevent the hydraulic pressure needed for shifting. 
• Faulty torque converter: The torque converter can fail and cause slipping or an inability to engage gears. 
• Malfunctioning shift solenoids: These control the flow of fluid. If they are faulty, they can prevent gears from engaging. 
• Broken shifter cable or linkage: This can prevent the computer from knowing the correct gear position. 
• Issues with the shift interlock solenoid: This safety feature prevents shifting out of park without the brake pedal being pressed. 

Manual transmission

• Worn or broken clutch: The clutch may not be disengaging fully, preventing gear engagement. 
• Clutch fluid leak: A leak can lead to a loss of pressure in the hydraulic clutch system, making it impossible to disengage the clutch. 
• Damaged shifter linkage or cable: This can misalign the shifter, so it doesn't engage the gears properly. 
• Misaligned gearbox: The internal parts may be damaged or misaligned. 

What you can do

• Check transmission fluid: Look for low levels or dark, burnt-smelling fluid. 
• Inspect the shifter: Check for any physical obstructions like a floor mat getting in the way of the clutch pedal or shifter. 
• Listen for sounds: Grinding sounds can indicate a mechanical problem, while silence or clicking might point to an electronic issue. 
• Try different gears: See if any gears (like reverse or neutral) will engage, even if one won't. 

When to call a professional

• Do not force the shifter: Applying excessive force can cause further damage to the transmission.
• Consult a specialist: If the issue isn't a simple one, it's best to have a transmission specialist diagnose and fix the problem. 

How do you reset the transmission on a Dodge Ram 1500?

You can reset the Ram 1500 transmission by disconnecting the battery or using the accelerator pedal method, which involves holding the pedal down for about 15 seconds while the ignition is on. For a more advanced reset, an OBD-II scanner can be used to clear codes and perform a "quick learn" procedure with a specific vehicle-driving test. After any reset, drive the vehicle normally to allow the Transmission Control Module (TCM) to relearn the new shift patterns. 
Method 1: Accelerator pedal reset
This method reboots the TCM without special tools.
This video demonstrates how to perform an accelerator pedal reset for a Dodge transmission: 54sCar Care CluesYouTube · Nov 11, 2024

1. Turn the ignition to the 'ON' position: without starting the engine. 
2. Press and hold the accelerator pedal: all the way down for about 15 seconds. 
3. While still holding the pedal, turn the ignition off. 
4. Release the accelerator pedal: and wait at least 5 minutes before restarting the engine. 
5. Take the truck for a test drive: to allow the TCM to relearn the new shift patterns. 

Method 2: Battery disconnection
This is a "hard reset" that clears all computer memory, including the TCM. 

1. Disconnect both the negative and positive battery terminals . 
2. Touch the disconnected positive and negative cables together: for a few minutes to drain any residual power from the modules. 
3. Wait for at least one hour: after reconnecting the battery to allow the computer to fully reset before starting the vehicle. 
4. Drive normally: to allow the TCM to relearn the shifting patterns. 

Method 3: OBD-II scanner reset
This method is for those who have an advanced diagnostic scanner and the professional version of the software for a more complete reset. 

1. Connect the scanner: to the vehicle's OBD-II port. 
2. Navigate through the scanner's menus to find the transmission control module (TCM). 
3. Select and perform the "Reset Adaptive Values" or "Quick Learn" procedure: as instructed by the scanner. 
4. Follow all on-screen instructions, which may involve specific steps for shifting gears and applying the brake. 
5. Test drive the vehicle: to verify that the shifts are smoother. 

How do you reset the service shifter on a Dodge Ram?

To reset a Dodge Ram's service shifter, try a simple electronic reset by turning the ignition to 'ON' without starting the engine, holding the brake for 10 seconds, turning the ignition off, and waiting 30 seconds, repeating this three times. A more comprehensive method is to disconnect the negative battery terminal for at least 20 minutes, then reconnect it. If these methods don't work, there may be a more serious underlying issue, such as a faulty transmission range sensor or brake switch, which may require professional diagnosis and a specific reset procedure using a diagnostic tool. 
You can watch this video to learn how to manually reset the transmission control module: 56sFixITYouTube · Jun 18, 2025
Simple electronic reset

1. Start the truck, but do not start the engine.
2. Press the brake pedal and hold it for 10 seconds.
3. Turn the ignition off.
4. Wait for 30 seconds.
5. Repeat this process two more times. 

Battery disconnect reset 

1. Turn the vehicle off and remove the keys from the ignition.
2. Open the hood and locate the negative (black) battery terminal.
3. Use a wrench to carefully disconnect the negative cable.
4. Wait at least 20 minutes to allow the system to fully discharge.
5. Reconnect the negative cable securely.
6. Start the truck to see if the warning has cleared. 

When simple resets fail

• Scan for codes: A persistent "service shifter" message may indicate a specific problem. Use a diagnostic scan tool to check for any trouble codes, which can help pinpoint the issue. 
• Inspect the brake switch: A faulty brake light switch is a common cause, as it can prevent the vehicle from registering when the brake pedal is pressed. 
• Check fuses: A blown fuse can cause this warning. Check the fuse box for any blown fuses related to the transmission or shifter. 
• Consult a professional: For more advanced issues, especially with newer models that require recalibration after a reset, a Mopar service department or a technician with a diagnostic tool like Alpha OBD may be needed to perform a proper reset. 

You can also watch this video to learn how to manually reset the shifter overrides: 57sGeorge MelnikYouTube · Feb 28, 2019

Why is my Ram 1500 not shifting gears?

If your Ram 1500 won't shift out of first gear, check the transmission fluid level and condition first. Low or dirty fluid can cause shifting issues. Inspect the transmission control module (TCM) for error codes using a scanner. Faulty shift solenoids or a failing torque converter can also cause this problem.