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Home >> Chevrolet >> 2006 >> Silverado 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 53 (Manual Transmission - NV 4500 - Overhaul) >> Repair Instructions >> Synchronizers Assemble (3rd/4th Speed Gear)

Synchronizers Assemble (3rd/4th Speed Gear)

WARNING: This page is about a different variant/trim than selected.
    IMPORTANT:
    • Only disassemble the synchronizer sleeve from the synchronizer hub if there is a suspected gear shift concern.
    • For installation alignment, scribe an alignment mark on the synchronizer hubs and synchronizer sleeves before disassembling.
    • Mark the synchronizers clutch gears and the blocking rings with the corresponding gear, for correct diagnostic inspections.
    • Install the synchronizer components in the same location, if reusing.
  1. Lay the synchronizer hub on the 3rd speed gear synchronizer blocking ring and clutch gear. The ring and gear will hold the hub up.
  2. Fig 1: Assembling Synchronizer - 3rd/4th Gear
    GM789419Courtesy of GENERAL MOTORS CORP.
  3. Slide the synchronizer sleeve on the synchronizer hub.
    • Align the large tooth with the large slot in the sleeve.
    • The sleeve can go either direction, if it is not marked.
  4. Using a small screwdriver, install the 3 springs and the 3 inserts.
  5. Move the sleeve to the neutral position, to hold the springs and inserts in position.