why does my Ram 1500 DT (2019-Present) transmission slip when shifting

Ram 1500 DT (2019-Present)

Error Codes

4-8 hours

Time

hard

Difficulty

high

Severity

4 min read

615 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 slipping in Ram 1500 DT (2019-Present). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Transmission

Estimated Time

4-8 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before opening the transmission or draining fluid.

Symptoms

•Transmission slips during acceleration
•Delayed engagement when shifting from park to drive or reverse
•Unusual noises (such as whining or grinding) during shifting
•Poor acceleration despite engine revs
•Check engine light illuminated
•Increased engine RPMs without corresponding vehicle speed

Diagnostic Steps

1
Scan the vehicle’s onboard computer for trouble codes using an OBD-II scanner.
2
Check the transmission fluid level and condition (color, smell, and contaminants).
3
Inspect for any visible leaks around the transmission and associated components.
4
Test the transmission solenoids with a multimeter to ensure proper operation.
5
Examine the transmission filter for clogs or debris.
6
Road test the vehicle to observe shifting behavior and identify any patterns.

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
•Transmission funnel
•Fluid pump
•Multimeter
•Socket set
•Torque wrench
•Rags

Parts Required

•Transmission fluid (Mopar ATF+4 or equivalent)
•Transmission filter
•Gasket

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Symptoms

•Transmission slips during acceleration

•Delayed engagement when shifting from park to drive or reverse

•Unusual noises (such as whining or grinding) during shifting

•Poor acceleration despite engine revs

•Check engine light illuminated

•Increased engine RPMs without corresponding vehicle speed

Diagnostic Steps

1
Scan the vehicle’s onboard computer for trouble codes using an OBD-II scanner.
2
Check the transmission fluid level and condition (color, smell, and contaminants).
3
Inspect for any visible leaks around the transmission and associated components.
4
Test the transmission solenoids with a multimeter to ensure proper operation.
5
Examine the transmission filter for clogs or debris.
6
Road test the vehicle to observe shifting behavior and identify any patterns.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is turned off.
Wear appropriate safety gear (gloves, goggles).

2. Check and Replace Transmission Fluid

Tools Required: Transmission funnel, fluid pump, rags.
Sub-steps:
1. Remove the transmission dipstick and wipe it clean.
2. Insert the dipstick back and pull it out to check the fluid level.
3. If low, add the recommended transmission fluid (Mopar ATF+4 or equivalent) through the dipstick tube.
4. If fluid is dark or burnt, proceed to drain and replace it.
  - Locate the transmission drain plug and remove it to allow fluid to drain into a pan.
  - Replace the drain plug after fluid has fully drained.

3. Replace Transmission Filter

Tools Required: Socket set, torque wrench, new transmission filter, gasket, and fluid.
Sub-steps:
1. Remove any necessary components to access the transmission pan (e.g., exhaust components, cross members).
2. Remove the transmission pan bolts with a socket set.
3. Carefully lower the pan and remove the old filter.
4. Clean the pan and the mating surface thoroughly.
5. Install the new filter and gasket, ensuring it is seated correctly.
6. Reattach the transmission pan and torque the bolts to the manufacturer’s specifications.

4. Check Solenoids and Wiring

Tools Required: Multimeter, wiring diagram.
Sub-steps:
1. Disconnect the battery to ensure safety.
2. Remove the electrical connectors from the solenoids.
3. Use a multimeter to test the resistance of each solenoid against specifications.
4. Repair or replace any faulty solenoids as required.

5. Test Drive

Sub-steps:
1. Reconnect the battery and start the vehicle.
2. Allow the transmission to warm up and perform a test drive to check for slipping.
3. Monitor shifting behavior and ensure no abnormal sounds are present.