DTC P0733: 3rd Gear Incorrect Ratio: General Description

To engage 3rd gear, line pressure is supplied to the 3rd clutch piston, engaging the 3rd clutch, and the mainshaft and the mainshaft 3rd gear are connected and revolve together. Hydraulic pressure is supplied to the 3rd clutch through the ATF strainer → the ATF pump → the regulator valve → the manual valve → the shift valves → the feed pipe → the 3rd clutch piston. (A shift valve failure in the supply route above is detected by the malfunction detection of each shift solenoid valve.) The powertrain control module (PCM) computes the ratio of the input shaft (mainshaft) speed to the output shaft (countershaft) speed. When the ratio is not the 3rd gear ratio, the PCM detects a malfunction of the hydraulic circuit or the 3rd clutch and stores a DTC.