The 68RFE transmission is a staple of Dodge Ram trucks equipped with Cummins diesel engines, offering a blend of strength, reliability, and advanced technology. It’s designed to handle heavy loads, making it a popular choice among truck owners for both everyday use and demanding applications like towing and hauling. This article delves into the features and benefits of the 68RFE transmission, explaining why it’s such a vital component of the Dodge Ram lineup.
What is the 68RFE Transmission?
The 68RFE is a six-speed automatic transmission introduced by Chrysler in 2007. It was designed to complement the powerful 6.7L Cummins diesel engine, offering seamless performance and improved durability over its predecessors.
- RFE Stands for: “Rear-wheel drive Fully Electronic,” highlighting its rear-wheel-drive configuration and electronically controlled shifting.
- Applications: Primarily found in Dodge Ram 2500 and 3500 heavy-duty trucks.
Key Features of the 68RFE Transmission
1. Six-Speed Design
The 68RFE’s six-speed configuration includes:
- Two Overdrive Gears: For enhanced fuel efficiency during highway driving.
- Wide Gear Ratios: Offering smoother transitions between gears and better adaptability to various driving conditions, such as towing or off-road scenarios.
2. Torque Management System
The transmission employs an advanced torque management system to handle the high torque output of the Cummins engine, ensuring durability under heavy loads.
3. Electronically Controlled Shifting
The electronic control module (ECM) optimizes shift points for performance and fuel efficiency, adapting to driving conditions in real time.
4. Robust Internal Components
- Steel Planetary Gears: For added strength and longevity.
- High-Strength Clutches: Designed to handle increased torque without slipping or premature wear.
5. Integrated Cooling System
The 68RFE features an advanced cooling system to prevent overheating during high-demand situations like towing or climbing steep grades.
Benefits of the 68RFE Transmission for Dodge Ram Owners
1. Enhanced Towing Capability
The 68RFE is engineered for heavy-duty performance, making it ideal for towing large loads. Key advantages include:
- Increased Torque Handling: Can manage up to 850 lb-ft of torque, ensuring reliability even under maximum towing conditions.
- Tow/Haul Mode: Adjusts shift points to maintain power and control when hauling heavy trailers.
2. Improved Fuel Efficiency
With two overdrive gears and electronically optimized shifting, the 68RFE helps maximize fuel economy during highway driving, a significant benefit for owners covering long distances.
3. Durability and Reliability
The 68RFE is built to withstand the rigors of heavy-duty applications:
- Reinforced Internal Components: Reduce wear and tear under high stress.
- Heat Management: The integrated cooling system ensures that the transmission operates within safe temperature limits, even in extreme conditions.
4. Smooth and Responsive Shifting
The electronically controlled shifting provides a seamless driving experience, with precise gear changes that adapt to the vehicle’s needs.
5. Compatibility with Engine Upgrades
The 68RFE is a favorite among enthusiasts who modify their Cummins engines for increased power. Its robust design allows it to handle moderate performance upgrades without significant modifications.
Common Concerns and Solutions
While the 68RFE transmission offers numerous benefits, it’s not without its challenges. Here are some common issues and ways to address them:
1. Overheating
- Cause: Prolonged towing or inadequate cooling.
- Solution: Upgrade to a larger aftermarket transmission cooler or switch to high-performance synthetic transmission fluid.
2. Weak Valve Body
- Cause: Over time, the stock valve body may develop leaks or pressure issues.
- Solution: Upgrade to an aftermarket valve body for better performance and durability.
3. Torque Converter Issues
- Cause: Slippage under high torque loads.
- Solution: Replace the stock torque converter with a high-performance aftermarket unit.
Performance Upgrades for the 68RFE
For owners looking to push their Dodge Ram’s performance, several upgrades can enhance the 68RFE’s capabilities:
- Shift Kits: Improve shifting speed and reduce wear on internal components.
- Heavy-Duty Clutch Packs: For increased torque capacity.
- Billet Input Shafts: Add strength to handle extreme loads.
- Tuning and Programmers: Optimize shift points and torque management for customized performance.
Maintenance Tips to Maximize Longevity
To keep the 68RFE transmission running smoothly, regular maintenance is essential:
- Fluid Changes: Replace transmission fluid and filters every 30,000 to 60,000 miles, depending on usage.
- Cooling System Check: Ensure the transmission cooler is free of blockages and functioning correctly.
- Inspect for Leaks: Check seals and gaskets periodically to prevent fluid loss.
Is the 68RFE Right for You?
The 68RFE transmission is a reliable and capable choice for Dodge Ram owners who need a balance of performance, efficiency, and durability. Whether you’re using your truck for daily commuting, towing a trailer, or off-road adventures, the 68RFE is built to handle it all.
While it has some limitations under extreme conditions, these can often be addressed with performance upgrades or proactive maintenance. With proper care, the 68RFE can serve as a dependable partner for your Dodge Ram, providing years of reliable service.