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Check oil seal for leakage and its lip for excessive hardness.
If either is found, replace.
Also, check corresponding surface of shaft where oil seal lip contacts. Correct or replace as necessary.
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Check clearance “a” between synchronizer ring (1) and output front shaft (2), protruding portion width “b” in synchronizer ring and each chamfered tooth of gear and synchronizer ring and synchronizer ring and replace with new one, if necessary. Also, check gear tooth.
If protruding portion “b” is out of specification, replace synchronizer ring.
Clearance “a” between synchronizer ring and output front shaft
Standard: 0.83 – 1.53 mm (0.033 – 0.060 in.)
Service Limit: 0.6 mm (0.024 in.)
Protruding portion width “b”
6.4 – 6.6 mm (0.252 – 0.260 in.)