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30. With the driveshaft set aside out of the way, bust out the reciprocating saw and slice a 5-1/2-inch section out of the carrier bearing's mounting channel. Be sure to center the cuts between the carrier bearing mounting bolts. Although lowering the carrier bearing minimizes the chance of driveline vibration, each truck is a little different. If the driveline still vibrates, the rear pinion angle can be adjusted using angled shims between the leaf pack and spring perch.