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DIAGNOSIS AND TESTING - TRANSFER CASE - NV233 DIAGNOSIS CHART Condition Possible Cause Correction Transfer case difficult to shift or will 1) Transfer case electronically 1) Verify proper operation per the 2) If vehicle was operated for an 2) Drive the vehicle in a straight line 3) Insufficient or incorrect lubricant. 3) Drain and refill transfer case with T ATF +4, Automatic Transmission Fluid. 4) Internal transfer case 4) Repair or replace components as Transfer case noisy in all drive 1) Insufficient or incorrect lubricant. 1) Drain and refill transfer case with T ATF +4, Automatic Transmission Fluid. 2) Internal transfer case 2) Repair or replace components as 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 21 - 876 TRANSFER CASE - NV233 ND |