Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBUICK2006LUCERNE V6-3.8L VIN 2REPAIR AND DIAGNOSISDIAGRAMSEXPLODED VIEWSAUTOMATIC TRANSMISSION/TRANSAXLESYSTEM DIAGRAM4T80-E AUTOMATIC TRANSAXLELOWER CONTROL VALVE BODY ASSEMBLY
2006 Buick Lucerne V6-3.8L VIN 2
Lower Control Valve Body Assembly
2006 Buick Lucerne V6-3.8L VIN 2SECTION Lower Control Valve Body Assembly
Disassembled Views
Lower Control Valve Body Assembly:
308 - Retainer Clip (3)
308 - Retainer Clip (3)
308 - Retainer Clip (3)
901 - Return Spring
902 - Retaining Ring
903 - Lower Control Valve Body
904 - Spring Retainer
905 - Ball Check Capsule
906 - 2-3 Shift Valve Spring
907 - 2-3 Shift Valve C
908 - 2-3 Shift Valve D
909 - 1-2 Shift Solenoid Valve
910 - 2-3 Shift Solenoid Valve
911 - 3-4 Shift Valve Spring
912 - 3-4 Shift Valve
913 - Manual Valve Link
914 - Bore Plug
915 - Manual Valve Link Retainer
916 - Manual Valve
917 - Solenoid Screen Assembly
918 - 1-2 Shift Valve Spring
919 - 1-2 Shift Valve A
920 - 1-2 Shift Valve B
928 - Low/Reverse Servo Piston
929 - Low/Reverse Servo Seal (Small)
930 - Low/Reverse Servo Seal (Large)
931 - Low/Reverse Servo Apply Pin
932 - Retaining Ring
933 - Servo Cushion Spring Washer
934 - Servo Cushion Spring
979 - Ball (0.375 Diameter)
980 - Low/Reverse Cushion Sleeve
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.