Ford F-150 rubbing and grinding noise at initial start, persists for about a mile on Ford F-150

Some Ford F-150 owners report experiencing a rubbing and grinding noise during initial startup that persists for about a mile. This issue is often attributed to a faulty starter motor, where worn or misaligned gears can produce the grinding sound. Additionally, problems with timing chain tension, lash adjusters, or the starter itself may contribute to the noise, and replacing these components could help resolve the issue. Furthermore, some owners find that a vacuum leak in the vacuum hoses, reservoir, or IWE solenoid can cause partial vacuum application to the IWE hubs, leading to a grinding noise when the hubs are not fully engaged or disengaged. It is recommended that owners have a professional mechanic inspect their Ford F-150 to accurately diagnose and address the underlying cause of this noise, as prompt resolution can prevent further damage and ensure optimal vehicle performance.