Roughly 7,802 Dodge Challengers built in 2017 had a transmission control module glitch that could leave the car showing Park on the dash while it was actually anything but. The fault traced back to software meant to smooth out shift quality, and Chrysler fixed it with a free dealer update. No accidents were ever tied to it, but it’s a solid reminder that horsepower isn’t the only thing worth double-checking.
Fiat Chrysler has been having some problems with its transmissions shifting out of Park and rolling away. Now the problem has ensnared some of its muscle cars.
According to the National Highway Traffic Safety Administration, an estimated 7,802 Dodge Challengers may indicate that they’re in Park when in fact they’re not. That could leave the vehicle rolling away unexpectedly, which (as you can imagine) could lead to a crash.
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Every muscle car owner trusts one basic thing without ever thinking twice about it: when the shifter says Park, the car is actually in Park. That trust got tested in 2017 for thousands of Dodge Challenger owners after a software quirk buried deep in the transmission control module started telling a different story than what was actually happening under the floor. The dash would show Park, the shifter would sit right where it should, while the transmission itself quietly settled into something else entirely. It’s the kind of mismatch between what a car tells you and what it’s actually doing that deserves real attention, not just a passing mention.
The Park Light That Lied
The root cause traced back to transmission control module software written to smooth out shift quality by extending clutch pressure vent rates. In certain conditions, that same software could trigger what engineers labeled a P1DDD fault, dropping the transmission into 6th-gear limp mode instead of Park — even while the dash indicator and the physical shifter both still showed Park engaged. The affected population was specifically 2017 Challengers built with the 5.7-liter Hemi V8 paired to the 8-speed automatic transmission, a combination that covers a meaningful chunk of the model year’s volume.
A Free Fix And Zero Reported Injuries
NHTSA’s recall covered roughly 7,802 vehicles, and FCA dealers handled the fix with a straightforward transmission control module software update at no cost to owners. The automaker reported no known accidents or injuries connected to the flaw before the recall went out, which is about as good an outcome as a software bug like this can have. It’s a reminder worth keeping in mind even for the fastest cars on this list: horsepower numbers get all the attention, but the software running quietly in the background is just as much a part of what makes a modern muscle car trustworthy.
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