Pinion Angle
WARNING:
On vehicles with electronic air suspension, suspension system MUST be disabled prior to hoisting or jacking. See DISABLING ELECTRONIC AIR SUSPENSION
under MAINTENANCE.
- Place protractor in vertical position, flush against 2 differential cover retaining bolts. Rotate protractor bubble indicator so that 90-degree mark aligns with indexing mark.
- Read protractor and calculate pinion angle. For example, if protractor indicates 85 degrees, pinion angle is 5 degrees. If pinion angle is not within specifications inspect rear suspension mounting. On Aerostar and Ranger, adjust pinion angle by installing tapered shims between rear springs and rear spring seats.