O 68RFE is a six-speed automatic transmission manufactured by Chrysler. It was introduced in 2007 and is commonly used in heavy-duty Dodge Ram trucks, particularly models equipped with the 6.7L Cummins Turbo Diesel engine. Designed to handle higher torque loads, the 68RFE is a critical component in Ram’s capability to haul and tow.
Key Specifications
| Specification | Details |
|---|---|
| Fabricante | Chrysler |
| First Introduced | 2007 |
| Type | 6-speed automatic |
| Gear Ratios | 1st: 3.23:1 2nd: 1.84:1 3rd: 1.41:1 4th: 1.00:1 5th: 0.82:1 6th: 0.63:1 Reverse: 4.44:1 |
| Max Torque Capacity | ~570 lb-ft (stock) |
| Weight | ~260 lbs (dry) |
| Transmission Fluid | ATF+4 (Mopar Automatic Transmission Fluid) |
| Cooling | External cooler recommended |
Features
- Electronically controlled with adaptive learning
- Integrated Tow/Haul mode for optimized shift patterns
- Dual overdrive for fuel efficiency at highway speeds
- Improved clutch and gear strength over its predecessor (545RFE)
- Typically paired with the 6.7L Cummins diesel engine in 2500 and 3500 series Ram trucks
Common Applications
| Vehicle Model | Years Used | Motor |
|---|---|---|
| Dodge Ram 2500 | 2007.5–present | 6.7L Cummins Turbo Diesel |
| Dodge Ram 3500 | 2007.5–present | 6.7L Cummins Turbo Diesel |
Common Issues
While reliable under normal use, the 68RFE has a few known issues, especially under heavy stress or improper maintenance:
- Torque converter failure
- Valve body issues
- Slow or harsh shifting
- Overheating under load without aftermarket cooling
These issues often appear when the transmission is pushed beyond factory torque limits without internal upgrades.
Cost Breakdown
| Item | Estimated Cost (USD) |
|---|---|
| New 68RFE Transmission | $3,500–$4,500 |
| Remanufactured Transmission | $2,200–$3,500 |
| Labor for Replacement | $800–$1,500 |
| Transmission Fluid (ATF+4) | $100–$150 (with filter) |
| Performance Rebuild/Upgrade | $4,500–$7,000+ |
Note: Costs vary based on location, mechanic, and level of upgrade.
Upgrade Options
Many aftermarket companies offer performance rebuild kits and improved valve bodies for the 68RFE, ideal for those running added horsepower or towing heavy loads regularly.
Popular upgrades include:
- Billet torque converters
- High-capacity clutch packs
- Improved valve bodies and solenoids
- Deeper pans for better cooling
Conclusion
O 68RFE transmission is a solid workhorse for diesel-powered Ram trucks, striking a balance between performance and durability. While it’s not without its limitations—especially when pushed past factory torque ratings—it can be a reliable unit when maintained properly or upgraded for performance. Whether you’re hauling trailers or building a performance diesel, understanding its capabilities and costs helps make the best decision for your needs.
