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Chrysler improves efficiency of top-drawer minivans

General Motors has proven that it's not all that difficult to eke a bit more efficiency out of already-finished models with its XFE line. By waving a magic wand over the engine's computer, subtle reprogramming tweaks can make a big difference. Other tricks involve altering transmission gear ratios for improved efficiency. Chrysler has gone ahead and made changes such as this to its minivans equipped with the top-level 4.0-liter SOHC V6 engine and six speed automatic transmission combo. The biggest changes seem to be to that auto gearbox, ... Read more →

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