It is common for one of the three plastic retention tabs to break on the wiring harness case pass-through connector. This allows the connector to be pushed into the case when connecting the external harness. Not only does this require extra labor to fix, it also requires a new wiring harness. Sonnax has now developed two wiring harness connector brackets to retain the internal harness connector even though the retention tabs may be broken: 77980-01K for the 4L60-E, and 34998-01K for 4L80-E units with late-style gray connectors only.
The 4L80-E unit uses two different wiring harness connector styles. The early style has exposed terminals and a red rubber gasket. The late style has a gray plastic enclosure surrounding the terminals. The Sonnax 4L80-E bracket 34998-01K works only with the late style connector.
Contact a Sonnax Parts Distributor.