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Automatic Transmission Fluid Leaks

Automatic Transmission - 10L80 MHS MQC | Diagnostic Information and Procedures | Document ID: 4572735

Checks Causes
Torque Converter (1) Inspect for damage, cracks at the lug, hub and seal welds.
Stator Shaft Support Assembly Seal (408) Inspect for cut, wear, or damage.
A/Trans Case Assembly (4) Inspect for porosity or damage. Inspect manual shaft seal. Inspect control wiring input sleeve seals.
A/Trans Case Extension Assembly (42) Inspect extension seal assembly. Inspect extension to case seal.
A/Trans Fluid Pan (17) Inspect the pan assembly for damage. Inspect gasket for damage or wear. Inspect case and pan for damage and flatness at gasket interface area.
Cooler Lines/Coolers Inspect and follow cooler lines to front radiator and external coolers. Some vehicles may have rear differential external and internal coolers.