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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1159 (Manual Transmission - AISIN AY6) >> Repair Instructions - Off Vehicle >> Synchronizers Assemble >> 5th/6th Gear Synchronizer

5th/6th Gear Synchronizer

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of 5th/6th Synchronizer Hub & Blocking Rings
    GM1474823Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Ensure that the hub slides easily.
  1. Apply lubricant GM P/N 88862475 (Canadian P/N 88862476 as shown in illustration. Install the following components into the 5th/6th synchronizer hub (124/118):
    • the 5th gear blocking ring (121b)
    • the 6th gear blocking ring (121a)
    2. Fig 2: View Of Reverse Gear Components
    GM1474824Courtesy of GENERAL MOTORS CORP.
  2. Apply lubricant to the blocking ring, driven gear and sleeve. Install the following components into the reverse gear (206):
    • the reverse gear insert (120) and the spring (195)
    • the reverse gear blocking ring (122)
    • the reverse driven gear (112)
    • the synchronizer sleeve (125)
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