Imagine if you bought a pickup truck to do some towing and hauling, and you made sure the truck you bought had the lowest possible gearing to give you the highest possible gross vehicle weight rating, and then you found out the axle gears listed on the Monroney weren't the gears actually on your pickup.
According to Automotive News, Robert Besley Jr. bought a 2014 Ram 1500 that he thought had 3.55:1 gears, as listed on the window sticker on the truck; however, it actually had 3.21:1 gears. After driving the truck for nine months, he was notified by Fiat Chrysler Automobiles that he had the wrong gears. According to a suit filed by Besley (a downloadable PDF of the suit is available at AutoNews.com), FCA offered Beasley only about $750 in Mopar dollars rather than replace the gearing for free. As a result, Beasley filed a class-action lawsuit on behalf of all those who might have bought a truck with the same gearing mixup.
How often or rare this type thing happens is unclear, but no doubt we'll be hearing more about this issue.
Cars.com images, Evan Sears