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Condition Possible Cause Correction Transfer case noisy while in, or 1) Transfer case not completely 1) While rolling 2-3 MPH and the 2) Range fork damaged, inserts 2) Repair or replace components as 3) Low range gear worn or 3) Repair or replace components as Lubricant leaking from transfer case 1) Transfer case overfilled. 1) Drain lubricant to the correct 2) Transfer case vent closed or 2) Clean or replace vent as 3) Transfer case seals damaged or 3) Replace suspect seal. Abnormal tire wear. 1) Extended operation in 4HI mode 1) Operate vehicle in 2WD mode on REMOVAL 1. Shift transfer case into 2WD. 2. Raise vehicle. 3. Drain transfer case lubricant. 4. Mark front and rear propeller shafts for alignment reference. 5. Support transmission with jack stand. 6. Remove the transfer case skid plate, if equipped. 7. Disconnect front and rear propeller shafts at trans- fer case. 8. Disconnect transfer case shift motor and mode sensor wire connectors (3). 9. Disconnect transfer case vent hose. 10. Support transfer case with transmission jack. 11. Secure transfer case to jack with chains. 12. Remove nuts attaching transfer case (2) to transmission (1). 13. Pull transfer case and jack rearward to disengage transfer case. 14. Remove transfer case from under vehicle. DISASSEMBLY Position transfer case in a shallow drain pan. Remove drain plug and drain any remaining lubricant remaining in 21 - 1428 TRANSFER CASE - NV243 - SERVICE INFORMATION DR/DH |