Automatic Transmission Fluid Leaks

WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

Checks	Causes
Leak at Bottom Pan
Bottom Pan	Damaged or not flat
Bottom Pan Gasket	Damaged or off location
Bottom Pan to Case Bolts	Flange inside out, damage High or low torque
Case	Porosity or cracked
Leak at Case Extension
Case	Porosity or cracked
Case Extension	Porosity or cracked
Case Extension to Case Bolts	Low torque Missing
Case Extension to Case Seal	Cut or nicked Missing
Leak at Converter Seal
Converter Hub Seal Assembly	Cut, nicked or worn Missing garter spring
Torque Converter Bolt	Low torque Damaged hub
Leak at Cooler Connectors
Case	Stripped threads Porosity Debris in threads
Cooler Connectors	Stripped threads Damaged flare, seal damage High or low torque Quick connect loose; not locked
Leak at Drive Axle Seal
CV Joint	Corrosion on Tri-Pot housing at mating surface
Leak at Electrical Connector
Case	Porosity or cracked
Electrical connector	Damaged or not seated Cut or nicked Missing, porosity
O-Ring Seal	Damaged or not seated Cut or nicked Missing, porosity
Leak at Fluid Fill Indicator
Seal on Indicator	Cut or nicked Missing
Leak at Manual Shaft
Linkage	Misadjusted
Manual Shaft Seal	Cut or nicked Not seated
Leak at Vehicle Speed Sensor
Vehicle Speed Sensor O-Ring Seal	Cut, nicked or missing