Lower Control Valve Body and Internal Mode Switch Installation

Special Tools

• J 39630-1  Lower Control/Valve Body Gasket Guide Pins
• J 39630-2  Lower Control/Valve Body Gasket Guide Pins
• DT-47707-R1  Internal Mode Switch Alignment Tool

For equivalent regional tools, refer to Special Tools .

Fig 1: Lower Control Valve Body & Guide Pins
Courtesy of GENERAL MOTORS COMPANY
1. Install the lower control valve body (903) over the J 39630-2  guide pins.
CAUTION:

Refer to Fastener Caution .

2. Position the solenoid valve fluid filter retainer (981) onto the lower control valve body (903) and install some of the valve body bolts (938, 940, 941) and hand tighten them.
3. Remove the J 39630-2  guide pins and tighten the bolts (938, 940, 941) in a star pattern to 8-14 N.m (6-10 lb ft).
Fig 2: Internal Mode Switch Alignment Tool
Courtesy of GENERAL MOTORS COMPANY
4. Position the DT-47707-R1  alignment tool onto the lower control valve body, next to the 2-3 shift solenoid valve, and install the two J 39630-1  guide pins.
NOTE:

Hold the IMS (942) against the DT-47707-R1  alignment tool while tightening the bolts.

5. Locate the internal mode switch (IMS) (942) against the DT-47707-R1  alignment tool, install the three 8 mm bolts (939) and tighten to 8-14 N.m (6-10 lb ft).
6. Remove the DT-47707-R1  alignment tool and the J 39630-1  guide pins.
Fig 3: Lower Control Valve Body
Courtesy of GENERAL MOTORS COMPANY
7. Install the remaining bolts (941) into the lower control valve body (903) and tighten to 8-14 N.m (6-19 lb ft).
Fig 4: Lower Control Valve Body Wire Harness
Courtesy of GENERAL MOTORS COMPANY
8. Connect the lower control valve body wire harness (943) to the following parts:
   • 1-2 shift solenoid valve (909)
   • 2-3 shift solenoid valve (910)
   • Internal mode switch (IMS) (942)