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Fig. 472: Locating 3-4 Shift Valve 25. Remove the bore plug retainer (395) and the bore plug (381). 26. Remove the 3-4 shift valve spring (386) and the 3-4 shift valve (385). CAUTION: Refer to Valve Springs Can Be Tightly Compressed Caution .
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 473: Identifying Isolator Valve & Regulator Apply Valve 27. Remove the bore plug retainer (395) and the bore plug (381). 28. Remove the regulator apply valve (380) and the regulator apply spring (397) and the isolator valve (398).
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 474: View Of 4-3 Sequence Valve & 3-4 Relay Valve 29. Remove the bore plug retainer (395) and the bore plug (381). 30. Remove the 3-4 relay valve (384) and the 4-3 sequence valve (383) and the 4-3 sequence valve spring (382). CONTROL VALVE BODY ASSEMBLE Inspection Procedure
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 475: Inspecting Control Valve Body For Channel Witness Marks 1. Inspect the valve body to spacer plate gasket for valve body channel witness marks. The witness marks should be complete. Incomplete witness marks may be caused by an uneven 2. Inspect the valve body casting for the following conditions: Porosity Cracks Damaged machined surfaces
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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