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Home >> Chrysler >> 2011 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 89 ((Transmission Control Module (TCM) - Electrical Diagnostics - As68RC Automatic Transmission)) >> Diagnosis and Testing >> P0730-Incorrect Gear Ratio >> Theory of Operation

Theory of Operation

WARNING: This page is about a different car, the 2011 RAM Pickup and 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

The Transmission Control Module (TCM) constantly calculates what the output shaft speed should be in any given gear based on the input speed sensor, output speed sensor and the current gear state.