Chevrolet Silverado / GMC Sierra. Service manual — part 1144

3. Leave J 39855-2 (2) which is part of kit J 39855 on the stator shaft until just before the

pump is to be installed into the transmission. See Special Tools.

Fig. 444: Identifying Pressure Relief Bolt Valve components
Courtesy of GENERAL MOTORS CORP.

4. Install the pressure relief ball (228) and pressure relief spring (229).

5. Install the pressure relief bolt rivet (227).

6. Install the oil pump cover screen seal (231) on the oil pump cover screen (232).

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

7. Install the oil pump cover screen (232) into the pump cover.

Fig. 445: Identifying Converter Clutch Valve Components
Courtesy of GENERAL MOTORS CORP.

8. Install the converter clutch valve spring (246).

9. Install the converter clutch valve (224).

10. Install the stop valve (223) and the oil pump converter clutch valve retaining ring (222).

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

Fig. 446: View Of Oil Pump Cover & Components
Courtesy of GENERAL MOTORS CORP.

11. Install the pressure regulator valve (216).

12. Install the pressure regulator isolator spring (218) and the pressure regulator valve spring

(217).

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

13. Install the reverse boost valve (219) in the reverse boost valve sleeve (220).

14. Install the reverse boost valve and sleeve in the pump cover.

15. Install the oil pump reverse boost valve retaining ring (221).

OIL PUMP COVER AND BODY ASSEMBLE

Tools Required

J 21368 Pump Body and Cover Alignment Band. See Special Tools.

Assemble

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado