2007 Ford Explorer Sport Trac Transmission

The 2007 Ford Explorer Sport Trac, a unique blend of SUV comfort and pickup truck utility, offered a relatively straightforward but crucial component: its transmission. Understanding the transmission options and their nuances is vital for anyone considering purchasing, maintaining, or repairing this vehicle. Let's delve into the specifics.

Transmission Options: A Tale of Two Units

For the 2007 model year, the Explorer Sport Trac featured two primary transmission choices, both automatic. The first, and more common, was the 5R55S 5-speed automatic. This unit was paired with both the 4.0L V6 and the 4.6L V8 engines. The second, found exclusively with the 4.6L V8, was the 6R60 6-speed automatic.

The 5R55S is a proven design, known for its relative reliability and ease of service, although it's not without its potential issues. It's an electronically controlled transmission, meaning its shift points and overall behavior are managed by the vehicle's computer system (PCM). This allows for a smoother driving experience and better fuel economy compared to older, fully hydraulically controlled transmissions.

The 6R60, on the other hand, represented a step forward in transmission technology for Ford. Its extra gear allowed for closer gear ratios, contributing to improved acceleration and potentially better fuel efficiency, especially at highway speeds. It also offered a more sophisticated electronic control system. However, its increased complexity also means potentially more points of failure and often, more costly repairs.

Common Issues and Considerations

Both transmissions share some common failure points, although the frequency and nature of the problems may differ. Here are a few key areas to be aware of:

• Valve Body Issues: The valve body is the hydraulic control center of the transmission. Wear and tear, contamination from dirty fluid, or even manufacturing defects can lead to valve sticking, erratic shifting, or complete transmission failure. This is a particularly common issue with the 5R55S. Symptoms include harsh shifts, slipping, and a failure to shift into certain gears.
• Torque Converter Problems: The torque converter is responsible for transferring engine power to the transmission. A failing torque converter can manifest as shuddering during acceleration, poor fuel economy, and stalling at low speeds. Lock-up torque converter failures are also common, leading to a loss of fuel efficiency.
• Fluid Degradation: Like all automatic transmissions, the Explorer Sport Trac's transmissions rely on clean, high-quality transmission fluid for proper lubrication and cooling. Neglecting fluid changes can lead to overheating, excessive wear, and ultimately, premature failure. It's crucial to use the correct type of fluid, as specified by Ford (typically Mercon V for the 5R55S and a specific synthetic fluid for the 6R60).
• Solenoid Failures: The solenoids are responsible for actuating the various hydraulic circuits within the transmission. Faulty solenoids can cause erratic shifting, failure to shift into certain gears, or even complete transmission failure. Diagnosing solenoid problems often requires specialized diagnostic equipment.

Maintenance and Longevity

Extending the life of your 2007 Explorer Sport Trac's transmission hinges on proactive maintenance. Regular fluid and filter changes are paramount. The recommended interval varies, but generally, a service every 30,000 to 60,000 miles is a good starting point, depending on driving conditions. Severe duty driving (towing, off-roading, frequent stop-and-go traffic) necessitates more frequent servicing. Always use the correct type of transmission fluid, and consider using a high-quality synthetic fluid for improved protection and performance. Avoid harsh acceleration and unnecessary shifting, and address any suspected transmission issues promptly to prevent further damage.

Diagnostic Tools and Techniques

Diagnosing transmission problems often requires specialized tools and knowledge. A scan tool capable of reading transmission-specific diagnostic trouble codes (DTCs) is essential. These codes can provide valuable clues about the nature and location of the problem. A thorough visual inspection can also reveal leaks, damage, or other obvious issues. Additionally, a transmission fluid analysis can help determine the condition of the fluid and identify potential problems early on. Mechanics familiar with Ford transmissions and equipped with appropriate diagnostic equipment are best suited to tackle complex transmission repairs.

In conclusion, the 2007 Ford Explorer Sport Trac's transmission, whether the 5R55S or the 6R60, is a critical component that requires careful attention and maintenance. Understanding its operation, potential issues, and proper service procedures is crucial for ensuring its longevity and performance.