Case Porosity Repair

4L80-E/4L85-E

Case Porosity Repair
Some external leaks are caused by case porosity in non-pressurized areas. You can usually repair these leaks with the transmission in the car.

1. Thoroughly clean the area to be repaired with a cleaning solvent. Air dry the area.

Caution: Epoxy adhesive may cause skin irritations and eye damage. Read and follow all information on the container label as provided by the manufacturer.

- Using instructions from the manufacturer, mix a sufficient amount of an epoxy to make the repair.
- While the transmission case is still hot, apply the epoxy. You can use a clean, dry soldering acid brush to clean the area and also to apply the epoxy cement. Make certain that the area to be repaired is fully covered.
- Allow the epoxy cement to cure for three hours before starting the engine.
- Repeat the fluid leak diagnosis procedures.