Guangzhou Meishun Automatic Transmission Co., Ltd.
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Typical Faults:
Sprag Spring Fatigue
Symptom: Harsh reverse engagement or 1-2 shift flare (P0730)
Cause: Repeated torque reversals weakening springs
Inner Race Wear
Symptom: Grinding noise in reverse
Trigger: Hardened ATF failing to lubricate contact surfaces
Hub Spline Stripping
Symptom: No movement in reverse (with forward gears working)
Root Cause: Improper heat treatment during manufacturing
Critical Checks:
Sprag Engagement: Must lock counterclockwise only
Radial Play: >0.2mm = replacement
Race Scoring: Visible grooves = immediate failure
Pro Tip: Always replace OWC and hub together – mismatched components cause instant re-failure.
