Lower Control Valve Body Assembly (4T80-E): Removal

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

Remove the nine 10-mm bolts (534) from the oil transfer plate (956) and wire harness assembly (943). See Fig 1 . Remove the oil transfer plate (956). Disconnect the wire harness extension (943) from the wire harness assembly (12). See Fig 2 .

NOTE: Do not reuse retainer (915), it must be replaced. See Fig 3 .

Use a small screwdriver in order to disconnect the manual valve link retainer (915) from the manual valve link (913).

NOTE: DO NOT pry against the internal mode switch assembly.

Lift the manual valve and link assembly link (913) out of the inside detent lever (17). Remove the two, 10-mm nuts (955) and the fourteen, 10-mm bolts (958) from the lower control valve body assembly (903). See Fig 4 .
Lift the lower channel plate, control valve body and accumulator assembly (903) and the lower control valve body wire harness extension (943) from the case as a single unit.

Fig 1: Identifying Oil Transfer Plate

Courtesy of GENERAL MOTORS CORP.

Fig 2: Identifying Wire Harness Extension

Courtesy of GENERAL MOTORS CORP.

Fig 3: Identifying Manual Valve Link Retainer

Courtesy of GENERAL MOTORS CORP.

Fig 4: Removing & Installing Lower Control Valve Body

Courtesy of GENERAL MOTORS CORP.