Home >> Volvo >> 2004 >> S80 Base, 2.5 59, FWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Transmission Control Module (TCM) Diagnostic Trouble Codes - 2 Of 5 >> TCM-002B: 4TH Gear. Incorrect Gear Ratio (4T65EV; 1999-2005) >> Incorrect gear ratio