why does my Ford F-150 13th Generation (2015-2020) transmission slip when I accelerate

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

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

510 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 Ford F-150 (2015-2020). 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

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

Symptoms

•Transmission slips or hesitates when accelerating
•RPMs increase without corresponding vehicle speed
•Harsh or erratic shifting
•Check engine light illuminated
•Fluid leaks under the vehicle
•Burning smell coming from the transmission area

Diagnostic Steps

1
Use an OBD-II scanner to check for any error codes related to the transmission.
2
Inspect the transmission fluid level and condition; look for discoloration or a burnt smell.
3
Check for any visible leaks in the transmission system.
4
Inspect the transmission filter for clogs or debris.
5
Test the transmission solenoids using a multimeter to ensure they are functioning properly.
6
Perform a road test to replicate the slipping issue and note the conditions under which it occurs.

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
•Torque wrench
•Transmission fluid drain pan
•Multimeter
•Jack and jack stands

Parts Required

•Transmission fluid
•Transmission filter
•Gasket for transmission pan
•Solenoids (if replacement is necessary)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Use an OBD-II scanner to check for any error codes related to the transmission.
2
Inspect the transmission fluid level and condition; look for discoloration or a burnt smell.
3
Check for any visible leaks in the transmission system.
4
Inspect the transmission filter for clogs or debris.
5
Test the transmission solenoids using a multimeter to ensure they are functioning properly.
6
Perform a road test to replicate the slipping issue and note the conditions under which it occurs.

Solution

1. Preparation

Gather tools and parts required for the repair.
Ensure the vehicle is parked on a level surface and the engine is cool.

2. Change Transmission Fluid and Filter

Sub-steps:
1. Raise the Vehicle: Use a jack and jack stands to elevate the vehicle safely.
2. Drain the Fluid: Place a drain pan under the transmission and remove the drain plug or pan bolts to drain old fluid.
3. Remove the Transmission Pan: Detach the pan bolts, gently pry off the pan, and clean the mating surface.
4. Replace the Filter: Remove the old filter and install a new one, ensuring it's properly seated.
5. Reattach the Pan: Apply a new gasket and torque the pan bolts to the manufacturer specifications (typically 10-12 ft-lbs).

3. Inspect and Replace Solenoids (if necessary)

Sub-steps:
1. Remove the Transmission Valve Body: Detach the necessary components to access the valve body.
2. Replace Solenoids: Disconnect the electrical connectors and remove the solenoids; install new solenoids in reverse order.
3. Reassemble the Valve Body: Ensure all components are correctly seated and reattach the valve body following torque specifications.