GMC 12479267 Seal,Front Differential Drive Pinion Gear

Loosening the wheel lug nuts, you should raise the front or rear of the vehicle and support it securely on jackstands. Consequently, block the opposite set of wheels to prevent rolling. After that, remove the wheels. Disconnecting from the differential pinion flange, secure it out of way. Hand-rotate the pinion and use a torque wrench to measure required torque for rotation. Having marked position of the pinion flange to shaft and counted number of exposed threads. It may necessary to use special tool or chain wrench to immobilize flange and remove pinion nut. If necessary, withdraw the flange with two-jaw puller. Removing old seal, discard it; Then apply lubricate lips of new seal and fill space between lips with wheel bearing grease; After that tap new seal into position using a seal installation tool or large socket; Install pinion flange aligning marks made earlier; Apply RTV sealant to ends of splines visible in center of flange; Install washer and new pinion nut tighting until the recorded number of threads are exposed; Finally measure torque required to rotate pinion and tighten nut in small increments till it matches recorded figure; Reinstall all components, tightening all fasteners to their specified torque values.

Loosen the wheel lug nuts, raise the vehicle, place it securely on jackstands and remove the wheel. Remove the splash shield from under the front axle. Remove the left driveaxle. Drain the lubricant from the front differential. Disconnect the lower stabilizer bar link from the lower control arm. Pry the seal out with a seal remover or pull it out with a slide hammer and adapter. Drive in a new seal, using a seal driver or a socket slightly smaller in diameter than the seal. Lubricate the lips of the seal with multi-purpose grease. Fill the differential with the proper lubricant. Install the driveaxle. Reconnect the lower stabilizer bar link. Install the splash shield, if equipped. Install the wheel, lower the vehicle and check for proper operation. For the left side seal, remove the driveaxle. Drain the lubricant from the front differential. Pry the Differential Seal out of the end of the axle-shaft tube with a seal remover or pull it out with a slide hammer and adapter. Drive in a new Differential Seal, using a seal driver or a socket slightly smaller in diameter than the seal. Lubricate the lips of the Differential Seal with multi-purpose grease. Reinstall the driveaxle.