my Ford Explorer transmission slips when I accelerate what should I check

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

486 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 during acceleration in Ford Explorer. 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 pan.

Symptoms

•Transmission slips during acceleration
•Harsh or delayed shifting
•Check engine light illuminated
•Unusual noises while shifting (grinding or whining)
•Fluid leakage under the vehicle
•Poor fuel economy

Diagnostic Steps

1
Check the transmission fluid level and condition using the dipstick.
2
Scan for error codes using an OBD-II scanner to identify any transmission-related codes.
3
Inspect the transmission fluid for contamination or a burnt smell.
4
Examine the transmission cooler lines and seals for leaks.
5
Test the vehicle's throttle position sensor (TPS) for proper operation.
6
Inspect the transmission filter for clogs or blockages.

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
•Clean drain pan
•Funnel

Parts Required

•Transmission fluid
•Transmission filter
•Transmission pan gasket
•Throttle position sensor (if needed)

Related Faults

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Diagnostic Steps

1
Check the transmission fluid level and condition using the dipstick.
2
Scan for error codes using an OBD-II scanner to identify any transmission-related codes.
3
Inspect the transmission fluid for contamination or a burnt smell.
4
Examine the transmission cooler lines and seals for leaks.
5
Test the vehicle's throttle position sensor (TPS) for proper operation.
6
Inspect the transmission filter for clogs or blockages.

Solution

1. Preparation

Gather all necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the battery to prevent any electrical shorts.

2. Check and Replace Transmission Fluid

Remove the transmission dipstick and check the fluid level; add fluid if low.
If the fluid appears burnt or dirty, proceed to replace it.
Tools Required: Socket set, funnel, clean drain pan.
Steps:
1. Place a drain pan under the transmission pan.
2. Remove the transmission pan bolts using a socket wrench.
3. Carefully lower the pan and allow fluid to drain completely.
4. Remove the old filter and replace it with a new one.
5. Clean the transmission pan and install a new gasket.
6. Reattach the pan and torque bolts to manufacturer specifications (typically around 12-15 ft-lbs).

3. Inspect and Repair Transmission Components

Check for any visible damage or wear on the internal transmission components.
Inspect the throttle position sensor (TPS) and replace if faulty.
Tools Required: Multimeter, transmission rebuild kit (if necessary).
Steps:
1. Remove electrical connectors from the TPS and use a multimeter to check for proper voltage.
2. If readings are outside specifications, replace the TPS.
3. If internal issues are suspected, consider a rebuild or replacement of the transmission.