* Driving habits: Aggressive driving, frequent towing heavy loads, and excessive idling significantly reduce transmission lifespan. Gentle driving and proper maintenance extend it.
* Maintenance: Regular fluid and filter changes are crucial. Neglecting maintenance is a leading cause of premature failure. The recommended service intervals should be followed meticulously.
* Towing: Frequent or heavy towing puts immense stress on the transmission. The heavier the load and the more frequently it's towed, the shorter the transmission's life expectancy.
* Transmission type: Different automatic transmissions (e.g., 47RE, 48RE, 68RFE, 68RFE) have varying inherent strengths and weaknesses. Some are known to be more robust than others.
* Vehicle condition: Overall vehicle maintenance impacts the transmission indirectly. Problems elsewhere in the drivetrain can put additional strain on the transmission.
* Quality of parts: Using low-quality replacement parts during repairs can lead to premature failure.
Considering all these factors, a well-maintained Dodge Cummins diesel automatic transmission *could* last 200,000 miles or more. However, it's not uncommon for them to require significant repairs or replacement before reaching that milestone, especially with heavy-duty use. Some might fail much earlier due to neglect or harsh operating conditions, while others, with exceptional care, might exceed 300,000 miles. There's no single definitive answer.
