The o-rings seal the junction connector to the trans body. The juntion connector 140 270 02 50 costs 9.75 list and comes with the o-rings. We replace the whole thing. This device is about 2-3 inches long and mounts onto the conductor plate and encompases the union with the cars harness.

There are good reasons to replace the conductor plate, leaks have not been one for us. the connector is a simple replacement.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician