RPO — Vehicle identification record listing factory-installed equipment. Browse RPO codes →
I understand the VIN has a character for the engine but I keep reading that it does not tell you the transmission. Which positions actually carry the powertrain information, and why does the transmission not get its own character?
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The eighth character generally identifies the engine family. There is no dedicated transmission character in the standard seventeen character layout.
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It is a space problem. Seventeen characters have to cover manufacturer, vehicle attributes, a check digit, year, plant and a serial number. Transmission did not make the cut.
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So the engine is in the VIN and the transmission is only in the build record. That clears up why the free decoders never show it.
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Correct, and even the engine character gives you a family rather than a specific variant in some years.
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