Pinpoint Test C : Diagonal Wear

Diagnostic Overview 

Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .

1. Possible Sources 
   • Excessive toe in/out
   • Incorrect tire rotation intervals

2. C1 MEASURE THE TREAD DEPTH
   
   
   • Using a tread depth gauge or similar tool, measure the tread depth of the wear pattern.

   Is the tread depth greater than 1.588 mm (0.0625 in) ' 

   Yes

   If no performance concerns (noise/vibration) are present, the tire can remain in service. CHECK the air pressure in the tires, ADJUST as necessary. ROTATE the wheel and tire assemblies. INSPECT for loose, worn or damaged suspension components. INSTALL new components as necessary. CHECK the alignment and ADJUST as necessary.

   No	INSTALL a new tire(s). CHECK the air pressure in the tires, ADJUST as necessary. ROTATE the wheel and tire assemblies. INSPECT for loose, worn or damaged suspension components. INSTALL new components as necessary. CHECK the alignment and ADJUST as necessary.