how to fix my Ram 1500 DT (2019-Present) transmission not shifting properly

Ram 1500 DT (2019-Present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

577 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix transmission shifting issues in the 2019 Ram 1500 DT. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Transmission

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before opening any components related to the transmission.

Symptoms

•Unusual engine revving without corresponding acceleration
•Harsh or delayed shifts between gears
•Transmission slipping or losing power during acceleration
•Fluid leaks under the vehicle
•Warning lights illuminated on the dashboard (e.g., check engine light)
•Unusual noises during shifting (grinding or whining)

Diagnostic Steps

1
Scan the vehicle's computer system using an OBD-II scanner for any error codes related to the transmission.
2
Check the transmission fluid level and condition (color and smell).
3
Inspect the transmission wiring harness for any signs of damage or corrosion.
4
Test the transmission solenoids for proper operation using a multimeter.
5
Examine the transmission filter for clogs or restrictions.
6
Perform a road test to replicate the shifting issue and note specifics (e.g., RPMs, speed, and conditions).

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Socket set
•Multimeter
•Torque wrench
•Transmission fluid pump

Parts Required

•Transmission filter
•Transmission fluid
•Transmission solenoids (if needed)

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Symptoms

•Unusual engine revving without corresponding acceleration

•Harsh or delayed shifts between gears

•Transmission slipping or losing power during acceleration

•Fluid leaks under the vehicle

•Warning lights illuminated on the dashboard (e.g., check engine light)

•Unusual noises during shifting (grinding or whining)

Diagnostic Steps

1
Scan the vehicle's computer system using an OBD-II scanner for any error codes related to the transmission.
2
Check the transmission fluid level and condition (color and smell).
3
Inspect the transmission wiring harness for any signs of damage or corrosion.
4
Test the transmission solenoids for proper operation using a multimeter.
5
Examine the transmission filter for clogs or restrictions.
6
Perform a road test to replicate the shifting issue and note specifics (e.g., RPMs, speed, and conditions).

Solution

1. Preparation

Tools Required: OBD-II scanner, socket set, multimeter, torque wrench, transmission fluid pump.
Ensure the vehicle is parked on a level surface.
Disconnect the battery to prevent electrical shorts during repairs.
Allow the engine to cool down before beginning work on the transmission.

2. Check Transmission Fluid

Remove the transmission dipstick and wipe it clean.
Reinsert the dipstick and remove it again to check fluid level; top off with the manufacturer-recommended transmission fluid if low.
Inspect the fluid’s color; if it’s dark brown or has a burnt smell, a fluid change is necessary.

3. Replace Transmission Filter

Tools Required: Socket set, torque wrench.
Drain the transmission fluid into a clean container.
Remove the transmission pan by loosening the bolts; be cautious of fluid spillage.
Remove the old transmission filter and replace it with a new one, ensuring proper alignment.
Reinstall the transmission pan and torque the bolts to the manufacturer’s specifications.

4. Test and Replace Transmission Solenoids (if necessary)

Disconnect the wiring harness from the solenoids.
Use a multimeter to test the resistance of each solenoid according to the specifications found in the service manual.
If any solenoid is faulty, replace it by removing the retaining screws and replacing it with a new unit.

5. Reconnect and Refill

Reconnect any wiring harnesses and the battery.
Use a transmission fluid pump to refill the transmission with the correct type and amount of fluid.
Start the engine and allow it to reach operating temperature, then recheck the fluid level and adjust as necessary.