Park the vehicle on a level surface and secure it
Support the vehicle at normal ride height
Measure the driveshaft angle
Measure the differential pinion angle
Compare the two angles
Set the pinion angle so it is typically 1 to 3 degrees lower than the driveshaft angle for a single-cardan setup
Set the pinion angle so it is typically parallel to the transmission output shaft for a double-cardan setup
Adjust using shims, control arms, trailing arms, or suspension links as applicable
Recheck all angles after each adjustment
Tighten all fasteners to specification
Verify proper driveline operation after installation