Brand Name:
FORD
Model Number:
6R75 6R80
Typical Faults:
Spline Stripping
Symptom: Slippage in direct gear (P0733/P0776 codes)
Cause: Hardened steel splines wearing against aluminum drum
Piston Bore Scoring
Symptom: Delayed 3-4 upshift
Trigger: Contaminated ATF acting as abrasive
Drum Cracking
Symptom: Sudden loss of drive (metal debris in pan)
Root Cause: Thermal fatigue near lubrication ports
Critical Checks:
Spline Engagement: Should have <0.1mm rotational play
Bore Diameter: Measure at 3 points (taper >0.03mm fails)
Drum Runout: >0.05mm requires replacement
Pro Tip: Use assembly lurbe on splines during rebuild – dry starts accelerate wear
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