why is my Ford F-150 13th Generation (2015-2020) not shifting smoothly

Ford F-150 13th Generation (2015-2020)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

549 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 Ford F-150 13th Generation (2015-2020). Step-by-step guide with diagnostic procedures 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 the transmission system to prevent burns.

Symptoms

•Jerky or harsh shifting between gears
•Delayed engagement when shifting from park to drive or reverse
•Unusual noises during gear changes (clunking or grinding)
•Fluctuating RPMs during acceleration
•Check engine light illuminated
•Fluid leaks under the vehicle

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any transmission-related trouble codes.
2
Inspect the transmission fluid level and condition; check for burnt smell or metal shavings.
3
Examine the transmission filter for clogs or restrictions.
4
Check the throttle position sensor (TPS) for proper function and alignment.
5
Inspect the transmission control module (TCM) connections for corrosion or loose wiring.
6
Test drive the vehicle to replicate the shifting issue while monitoring engine and transmission behavior.

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
•Screwdriver set
•Transmission fluid pump
•Transmission fluid

Parts Required

•Transmission fluid
•Transmission filter
•Gasket for the transmission pan
•Throttle position sensor (if replacement is necessary)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any transmission-related trouble codes.
2
Inspect the transmission fluid level and condition; check for burnt smell or metal shavings.
3
Examine the transmission filter for clogs or restrictions.
4
Check the throttle position sensor (TPS) for proper function and alignment.
5
Inspect the transmission control module (TCM) connections for corrosion or loose wiring.
6
Test drive the vehicle to replicate the shifting issue while monitoring engine and transmission behavior.

Solution

1. Preparation

Tools Required: OBD-II scanner, socket set, screwdriver set, transmission fluid pump, transmission fluid.
Ensure the vehicle is on a level surface and the engine is cool.
Disconnect the battery to prevent electrical issues during repairs.

2. Check and Replace Transmission Fluid

Sub-steps:
1. Locate the transmission dipstick and remove it to check fluid level.
2. If fluid is low, add the manufacturer-recommended transmission fluid.
3. If fluid is burnt or contaminated, proceed to drain and replace the fluid.
  - Drain: Remove the transmission pan bolts and carefully remove the pan.
  - Replace: Install a new transmission filter and gasket, then reassemble the pan.
  - Refill: Use a transmission fluid pump to refill the system with new fluid.

3. Inspect and Replace the Throttle Position Sensor (If Needed)

Sub-steps:
1. Locate the TPS on the throttle body.
2. Disconnect the electrical connector and remove the mounting screws.
3. Install the new TPS and reconnect the electrical connector.
4. Adjust the TPS if required according to the manufacturer’s specifications.

4. Check Transmission Control Module (TCM)

Sub-steps:
1. Inspect wiring and connectors for signs of damage or corrosion.
2. Clean any corrosion with electrical contact cleaner.
3. Reconnect and secure all connections.
4. If necessary, replace the TCM based on diagnostic results.