Installation Procedure

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Apply a light coat of axle lubricant, GM P/N 12378557 or equivalent meeting GM Specification 9986207, to the lip of the pinion seal.
Install the new seal using the J 45710.

Fig 1: Installing Drive Pinion Flange/Yoke And/Or Oil Seal - 9.75 Inch Axle (1 Of 5)
Courtesy of GENERAL MOTORS CORP.
Install the pinion yoke.
NOTE: Refer to PINION FLANGE/YOKE INSTALLATION NOTICE in Cautions and Notices.
Seat the pinion yoke onto the pinion shaft by tapping it with a soft-faced hammer until a few pinion shaft threads show through the yoke.

Fig 2: Installing Drive Pinion Flange/Yoke And/Or Oil Seal - 9.75 Inch Axle (2 Of 5)
Courtesy of GENERAL MOTORS CORP.
Install the washer.

Fig 3: Installing Drive Pinion Flange/Yoke And/Or Oil Seal - 9.75 Inch Axle (3 Of 5)
Courtesy of GENERAL MOTORS CORP.
Install the new pinion nut

Fig 4: Installing Drive Pinion Flange/Yoke And/Or Oil Seal - 9.75 Inch Axle (4 Of 5)
Courtesy of GENERAL MOTORS CORP.
Install the J 8614-01 onto the pinion yoke as shown.
NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
Tighten the pinion nut while holding the J 8614-01.
Tighten

Tighten the pinion nut to 370 N.m (273 lb ft).
Install the propeller shaft to the rear axle pinion yoke. Refer to WHEEL SPEED SENSOR REPLACEMENT -- REAR in Propeller Shaft.
Inspect and add axle lubricant to the axle housing, if necessary. Refer to LUBRICANT LEVEL INSPECTION - REAR DRIVE AXLE (8.6 INCH AXLE) or LUBRICANT LEVEL INSPECTION - REAR DRIVE AXLE (9.5, 10.5 INCH AXLE) or LUBRICANT LEVEL INSPECTION - REAR DRIVE AXLE (9.75 INCH AXLE) .
Lower the vehicle.

Fig 5: Installing Drive Pinion Flange/Yoke And/Or Oil Seal - 9.75 Inch Axle (5 Of 5)
Courtesy of GENERAL MOTORS CORP.