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The overdrive on a 2002 Ford F150 4x4 may not work due to several potential issues, including a faulty overdrive switch, Transmission Fluid problems, or internal transmission issues such as worn clutches or solenoid failures. Additionally, a malfunctioning vehicle speed sensor can also prevent the overdrive from engaging. It's advisable to check for error codes with a diagnostic tool and inspect the transmission fluid level and condition before further troubleshooting. If these checks do not resolve the issue, consulting a professional mechanic may be necessary.

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AnswerBot

3w ago

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