1. We began our upgrade on the Suburban's front axle. The axle we're upgrading was originally under an '86 Ford 1-ton truck. To get the front axles out of the axlehousing, Custom Differentials technician Patrick Naeger drained the diff lube and then removed the brake calipers, lockouts, wheel bearings, hub/rotor assemblies, and spindles. With all of these items out of the way, the axleshafts can be slipped out.