The 5-speed automatic (licensed from Mercedes-Benz) used across early-to-mid 2000s Dodge and Chrysler rear-wheel-drive models — a fundamentally sound design let down mainly by neglected fluid service.
Derived from a Mercedes-Benz design, this transmission has a fundamentally solid engineering pedigree, and most documented issues trace back to neglected fluid service rather than an inherent weakness. Torque converter shudder and occasional harsh shifting are the most commonly reported complaints, both of which are meaningfully reduced by proactive fluid changes rather than relying on the factory's longer service interval recommendation.
Not a guarantee, but a pattern seen consistently across owner forums and independent-garage reporting.
The point many independent specialists recommend a proactive fluid and filter service, regardless of factory guidance.
Torque converter shudder becomes more commonly reported on unserviced examples within this range.
Proactively serviced examples commonly continue without major transmission work.
Ask whether a transmission fluid service has ever been performed, and treat an unserviced high-mileage example as a candidate for proactive service.
During the test drive, check for smooth engagement from park and watch for any shudder during light-throttle cruising.
A delayed or harsh shift into higher gears can point to valve body wear, worth a specialist diagnostic if present.