Being the technical director for the valve-body and solenoid department, I’ve seen more than my share of errors and mistakes that people have made while working with automatic transmissions. The majority involve electrical components, most of them involving the connectors in some way. Often damage to a connector is done during the disconnection process. We’ve all been told not to wiggle a connector to get it off because it can expand the pin cavities in the connector and cause the pins to have poor or no connection when the connector is plugged back in; for example, in Chrysler 604s.
The 604/41TE has been around for some time and we are all pretty familiar with it; however, some things still pose a challenge on this transmission, and one of them is leaks.