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Rear output shaft seal 1. Inspect for the following conditions: Overfilled or improper transfer case fluid Blocked vent Seal improperly installed, worn, or damaged Seal bore damaged or cracked Rear output shaft bushing for excessive wear Slip yoke seal surface for wear or pitting 2. Repair or replace the following components if found faulty: Adjust or replace the transfer case fluid. Refer to Clean or properly route the vent hose. Replace the rear output shaft seal. Refer to Rear Replace the rear case half if the seal bore is Replace the rear bushing if worn. Refer to Replace the slip yoke if the surface could cause Front output shaft seal 1. Inspect for the following conditions: Overfilled or improper transfer case fluid Blocked vent Seal improperly installed, worn or damaged Seal bore damaged or cracked Leaking cup plug in the front output shaft 2. Repair or replace the following components if found faulty: Adjust or replace the transfer case fluid. Refer to
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Transfer Case - MP 1222/1225/1226-NQG - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Clean or properly route the vent hose. Replace the front output shaft seal. Refer to Front Replace the front case half if the seal bore is Replace the cup plug in the front output shaft if Shift lever seal leaking Replace the shift lever seal. Refer to Transfer Case Leaking at the vent pipe Transfer case overfilled Inspect for the correct transfer case fluid level. Refer to Inspect for a damaged or missing vent pipe. Replace a damaged or missing vent pipe and seal the vent Transfer case to adapter 1. Inspect for the following conditions: Loose mounting fasteners Gasket faulty The transfer case input shaft seal leaking The pilot bearing in the input shaft leaking 2. Repair or replace the following components if found faulty: Repair or replace the loose fasteners. Refer to Replace the transfer case adapter gasket. Refer to Replace the transfer case input shaft seal. Refer to Inspect for the following conditions: Seal improperly installed, worn, or damaged
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Transfer Case - MP 1222/1225/1226-NQG - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
REPAIR INSTRUCTIONS - ON VEHICLE TRANSFER CASE CONTROL LEVER REPLACEMENT Fig. 4: Transfer Case Control Lever Seal bore damaged or cracked Input shaft seal surface worn, grooved, or Replace the pilot bearing in the input shaft if Case leaking 1. Inspect for the following conditions: A cracked case Case porosity 2. Replace the faulty case half. Refer to Transfer Case Disassemble and Transfer Case Assemble. Front case half to rear case Disassemble and seal the case halves. Refer to Transfer Case
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Transfer Case - MP 1222/1225/1226-NQG - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
TRANSFER CASE CONTROL ROD REPLACEMENT Removal Procedure Callout Component Name Preliminary Procedures 1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . 2. Remove the transfer case shield, if equipped. Refer to Transfer Case Shield Replacement . 3. Remove the front propeller shaft. Refer to Front Propeller Shaft Replacement . 4. Remove the control rod. Refer to Transfer Case Control Rod Replacement. 1 Transfer Case Control Lever Knob Procedure 1. Using an adjustable wrench, adjust the wrench to fit the control lever rod just below the knob. 2. With the adjustable wrench touching the control lever knob, gently tap on the adjustable wrench in an upward motion until the knob is separated 2 Transfer Case Control Lever Bezel Cover 3 Transfer Case Control Lever Bezel Screw (Qty: 3) Tighten: 12 N.m (106 lb in) NOTE: Refer to Fastener Notice . 4 Transfer Case Control Lever Bezel 5 Transfer Case Control Lever Bolt (Qty: 4) Tighten: 25 N.m (18 lb ft) 6 Transfer Case Control Lever IMPORTANT: Before beginning the following service procedure, place the transmission into the PARK position. Then place the transfer
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Transfer Case - MP 1222/1225/1226-NQG - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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