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Home >> Pontiac >> 2007 >> Solstice Base, Standard >> Repair and Diagnosis >> Transmission >> Manual Transmission >> Repair Instructions >> Synchronizers Assemble >> 3rd/4th Gear Synchronizer

3rd/4th Gear Synchronizer

    Fig 1: View Of 1st/2nd Gear Synchronizer Hub Insert
    GM881243Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The 3rd/4th gear synchronizer hub cannot be used again after removal. Always install a new hub.
  1. Install the synchronizer spring in the hole of a new 3rd/4th gear synchronizer hub.
  2. Slide the insert in while pushing down on the spring.
    3. Fig 2: Identifying 3rd/4th Synchronizer Sleeve
    GM880957Courtesy of GENERAL MOTORS CORP.
  3. Install the 3rd/4th synchronizer sleeve on the hub while pushing in the inserts.
    • The shoulder of the sleeve with the step goes forward, 4th gear side.
    • The smooth side of the hub, without the indents for synchronizer tabs, is the 4th gear side.
    • Align the inserts with the non-tooth areas of the sleeve.
    4. Fig 3: Locating 3rd/4th Gear Synchronizer Hub Components
    GM880955Courtesy of GENERAL MOTORS CORP.
  4. Install the following components to the 3rd/4th gear synchronizer hub (235):
    1. The 3rd gear outer blocking ring (236)

      Ensure the tabs align in the hub.

    2. The 3rd gear internal blocking ring (237)
    3. The 3rd gear inner blocking ring (238)

      Ensure the tabs align in the hub

      The 4th gear blocking ring is installed with the input gear.

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