M/T Synchro Ring and Gear Inspection
  1. Measure the clearance between each gear (A) and its synchro ring (B) all around the gear. Hold the synchro ring against the gear evenly while measuring the clearance. If the clearance is less than the service limit, replace the synchro ring and gear.
    Synchro Ring-to-Gear Clearance
    Standard:
    0.655−1.334 mm (0.026−0.053 in.)
    Service Limit:
    0.4 mm (0.016 in.)

    Double Cone Synchro-to-Gear Clearance
    Standard:
    (1):
    Outer Synchro Ring (B) to Synchro Cone (C) 0.70−1.19 mm (0.028−0.047 in.)
    (2):
    Synchro Cone (C) to Gear (A) 0.50−1.04 mm (0.020−0.041 in.)
    (3):
    Outer Synchro Ring (B) to Gear (A) 0.95−1.68 mm (0.037−0.066 in.)
    Service Limit:
    (1):
    0.3 mm (0.012 in.)
    (2):
    0.3 mm (0.012 in.)
    (3):
    0.6 mm (0.024 in.)


Synchro ring-to-gear
Double cone synchro-to-gear