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HOMESERVICE MANUALSPONTIAC2007WAVE LT, 4D HATCHBACK, STANDARD, Y4M/MLMREPAIR AND DIAGNOSISTRANSMISSIONMANUAL TRANSAXLE - Y4MREPAIR INSTRUCTIONSSYNCHRONIZER ASSEMBLY INSPECTION
2007 Pontiac Wave LT, 4D Hatchback, Standard, Y4M/MLM

Synchronizer Assembly Inspection

2007 Pontiac Wave LT, 4D Hatchback, Standard, Y4M/MLMSECTION Synchronizer Assembly Inspection
    Fig 1: Inspecting The Synchronizer Assembly For Damage
    GM1223795Courtesy of GENERAL MOTORS CORP.
  1. Inspect the wear of the cone area. After matching synchronizer ring to gear, measure as shown in figure. Replace if it is below limit.

    Specifications:

    • The standard clearance between the gear and ring is 1 mm (0.039 in).
    • The clearance limit between the gear and ring is 0.5 mm (0.020 in).
    2. Fig 2: Ring Inner Surface & Gear Cone
    GM1223803Courtesy of GENERAL MOTORS CORP.
  2. Inspect the cone contact condition. When synchronizer mechanism is abnormal in operation, connection between ring inner surface and gear cone area is considered to be partially defective in spite of correct clearance between gear and ring. Therefore, cone area and ring inner surface shall be inspected. In this case, ring inner surface shall be glossy. Black area is abnormal and if inspection is difficult, inspect after applying red lead. Cone area can be worn in wave form.
    3. Fig 3: Measuring Key Slot Width Of Synchronizer Ring
    GM1223775Courtesy of GENERAL MOTORS CORP.
  3. Inspect the key slot width of synchronizer ring. Measure key slot width of synchronizer ring. Replace if it exceeds the limit.

    Specifications:

    • The standard key slot width for 1st gear is 9.6 mm (0.378 in).
    • The limit key slot width for 1st gear is 10 mm (0.394 in).
    • The standard key slot width for 2nd, 3rd, and 4th gear is 9.6 mm (0.378 in).
    • The limit key slot width for 2nd, 3rd, and 4th gear is 10 mm (0.394 in).
    • The standard key slot width for 5th gear is 9.4 mm (0.370 in).
    • The limit key slot width for 5th gear is 9.8 mm (0.386 in).
    4. Fig 4: Inspecting Synchronizer Ring Teeth For Damage
    GM1223784Courtesy of GENERAL MOTORS CORP.
  4. Inspect for worn or damaged synchronizer ring teeth. Replace it if necessary.
    5. Fig 5: Worn Synchronizer Key & Spring
    GM1223790Courtesy of GENERAL MOTORS CORP.
  5. Inspect for worn synchronizer key (2).
  6. Inspect for weak, damaged or broken spring (1).
RENDER: 1.0x

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