Understanding 68RFE Transmission Problems and Their Solutions

The 68RFE transmission, used in various Dodge Ram trucks equipped with the Cummins 6.7L diesel engine, has gained a reputation for both its strengths and weaknesses. While it offers smooth shifting and can handle substantial power, it is also known for several common issues. This article explores these problems and provides solutions to help keep your transmission running smoothly.

Common 68RFE Transmission Problems

1. Overheating:
   • Cause: Towing heavy loads or driving in hot conditions can cause the 68RFE to overheat, leading to degraded transmission fluid and potential damage to internal components.
   • Solution: Install an aftermarket transmission cooler to help dissipate heat more efficiently. Regularly check and maintain the transmission fluid levels and condition.
2. Solenoid Pack Failure:
   • Cause: The solenoid pack, which controls the shifting of gears, can fail due to electrical issues or contamination in the transmission fluid.
   • Solution: Replace the solenoid pack with a new or upgraded unit. Regular fluid changes can help prevent contamination-related issues.
3. Torque Converter Issues:
   • Cause: The torque converter in the 68RFE can suffer from issues such as clutch slippage or lockup problems, leading to poor performance and potential damage.
   • Solution: Upgrade to a high-performance torque converter designed to handle increased power and torque. Ensure the transmission fluid is clean and at the proper level.
4. Clutch Pack Wear:
   • Cause: The clutch packs in the 68RFE can wear out prematurely, especially under heavy use or poor maintenance conditions.
   • Solution: Install upgraded clutch packs that are designed for higher durability and performance. Regularly inspect and replace transmission fluid to reduce wear.
5. Valve Body Problems:
   • Cause: The valve body, which controls the flow of transmission fluid, can develop issues due to wear or contamination, leading to erratic shifting and poor performance.
   • Solution: Consider replacing the valve body with an upgraded version that offers improved flow and durability. Regular fluid changes can help maintain valve body performance.
6. Software and Tuning Issues:
   • Cause: The 68RFE’s performance can be impacted by outdated or improper tuning, leading to shifting issues and poor overall performance.
   • Solution: Update the transmission control module (TCM) with the latest software from the manufacturer. Custom tuning by a professional can also optimize performance for specific applications.

Preventive Maintenance Tips

1. Regular Fluid Changes:
   • One of the most important maintenance tasks for the 68RFE is regular transmission fluid changes. Using high-quality synthetic fluid can help improve performance and longevity.
2. Transmission Filter Replacement:
   • Replacing the transmission filter during fluid changes helps to keep the transmission clean and free of contaminants, reducing wear and preventing issues.
3. Monitoring Transmission Temperature:
   • Installing a transmission temperature gauge allows you to monitor the operating temperature and take action if it begins to overheat. Keeping the transmission within its optimal temperature range can prevent many issues.
4. Avoiding Overloading:
   • While the 68RFE is capable of handling heavy loads, consistently pushing it to its limits can accelerate wear and lead to problems. Avoid overloading your vehicle and adhere to recommended towing capacities.
5. Professional Inspection:
   • Periodic professional inspections can identify potential issues before they become serious problems. A transmission specialist can provide valuable insights and recommendations for maintaining your 68RFE.

Conclusion

The 68RFE transmission, while capable and versatile, requires careful maintenance and attention to perform at its best. By understanding common issues and implementing preventive measures, you can ensure the longevity and reliability of your transmission. Upgrades and regular maintenance are key to avoiding the pitfalls and enjoying the full potential of your Dodge Ram’s 68RFE transmission.