Chevrolet Silverado / GMC Sierra. Service manual — part 905

Fig. 220: View Of J 24459-5 & J 43770
Courtesy of GENERAL MOTORS CORP.

1. Install J 24459-5 (1) onto J 43770 (2). See Special Tools.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Fig. 221: J 43770, J 24459-5 & Oil Pump Retaining Bolts
Courtesy of GENERAL MOTORS CORP.

2. Position the oil pump cover assembly (1) on the work table so that the rear of the oil pump

cover assembly is facing down.

3. Align J 43770 (5) and J 24459-5 (4) with the oil pump cover so that:. See Special Tools.

The threaded rod of J 43770 is facing down. See Special Tools.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Two bolt holes of J 43770 align with the bolt holes of the oil pump cover. See Special
Tools.

4. Install J 43770 (5) onto the oil pump cover assembly. See Special Tools.

5. Install 2 oil pump cover retaining bolts (2).

6. Align the slot of J 24459-5 (4) with the retainer pin (3). See Special Tools.

7. Using J 24459-5 (4) and J 43770 (5), compress the main regulator valve spring until the

retainer pin (3) is loose. See Special Tools.

8. Turn the oil pump cover so that the pin (3) is accessible.

9. Using a pick, push the pin through the oil pump cover (1).

10. Relieve the main regulator valve spring tension.

11. Remove tools J 43770 and J 24459-5 . See Special Tools.

Fig. 222: View Of Stop, Spring & Main Regulator Valve
Courtesy of GENERAL MOTORS CORP.

12. Remove the stop (3), the spring (2), and the main regulator valve (1).

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Fig. 223: 1-2-3-4 Clutch Backfill Valve Spring Retaining Clip & J 43773
Courtesy of GENERAL MOTORS CORP.

13. Using J 43773 (2), compress the 1-2-3-4 clutch backfill valve spring until the retaining clip

(1) is loose. See Special Tools.

14. Remove the clip.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado