The Ford F650, equipped with a Cummins 6.7L engine, is a popular choice for those needing a powerful and dependable workhorse. But how reliable is this powertrain combination, and what kind of performance can you expect? Let’s explore the longevity and capabilities of the F650 Cummins Engine.
The older 4-speed automatic transmissions (46RE/47RE), when built to 48RE specifications with upgraded friction components and minor modifications, can prove remarkably durable. However, the 68RE, with its additional gears, offers a significant advantage. Despite occasional negative anecdotes, these older 4-speed transmissions often provide hundreds of thousands of trouble-free miles, especially with proper maintenance. For example, a car hauler with a 2005 model, towing a 3-car trailer, has approached 300,000 miles on a single rebuild, thanks to proactive maintenance and recommended modifications. Regular transmission service, keeping the system clean, is crucial for longevity. Preventative maintenance, addressing potential issues before they escalate into costly breakdowns, is key to maximizing the lifespan of any transmission.
While the Allison transmission is widely recognized as a superior option specifically designed for heavy-duty applications, and Dodge conversions are available, they come with a significant price tag. For those seeking a balance between performance and affordability, the Ford chassis and its transmission options remain a solid choice. Even with a 22-foot single-car trailer or heavier loads like Kubota excavators, the F650 can handle the task with relative ease. Proper operating temperatures are vital. Overheating, particularly from previous owners, can significantly impact transmission lifespan. Maintaining temperatures below 180 degrees Fahrenheit, even under heavy loads and lower gears on steep inclines, is crucial for long-term reliability.
Ultimately, the Ford F650 with the Cummins 6.7L engine offers a robust platform for demanding tasks. While transmission choices and maintenance play a critical role in longevity, the F650’s overall build quality and the Cummins engine’s reputation for reliability make it a compelling option in its class.
