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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 20 (Manual Transmission - NV 4500 - Service) >> Diagnostic Information and Procedures >> Transmission Gear Clash When Shifting Gears >> Diagnostic Aids

Diagnostic Aids

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Gear clashing may be caused by shifting at too high of an engine RPM or by rushing the shift. If gear clashing is occurring in more than one gear, the clutch may not be releasing properly for proper synchronizer operation.