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Home >> Chevrolet >> 2021 >> Trailblazer RS, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Automatic Transmission - VT40 (MRG) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> No Forward and Reverse

No Forward and Reverse

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Checks Action
Forward Clutch Housing (303) and Forward Clutch Spring (304) Inspect for damage or distortion. Replace the forward clutch piston assembly (303) and forward clutch spring (304). Forward Clutch Assembly Disassemble
Input shaft on the Forward Clutch (106) Inspect for damage or a broken tooth. Replace the forward clutch housing assembly (302). Forward Clutch Assembly Disassemble
Reverse Sun Gear (308) Inspect for worn or broken teeth. Replace the reverse sun gear (308). Forward Clutch Assembly Disassemble
Pressure Regulator Valve train Inspect for:
  • Worn or stuck valve (221)
  • Worn or stuck shuttle valve (222)
  • Worn, sticking or damaged spring (220)
  • Damaged or incorrectly installed bore plug retainer (224)
  • Worn or damaged bore bushing (223)

Control Valve Body Disassemble
Manual Valve (234) Inspect for wear, sticking or binding. Control Valve Body Cleaning and Inspection
Feed Limit Valve (241) and Feed Limit Valve Spring (242) Inspect for wear, sticking, binding or damage. Control Valve Body Cleaning and Inspection
Control Valve Body Spacer Plate (202) Inspect for worn or plugged fluid passages. Replace or flush the spacer plate (202). Control Valve Body Disassemble
Control Valve Body (67) Inspect for clogs with debris or sediment. Replace or flush the control valve body assembly (67). Control Valve Body Cleaning and Inspection
Control Valve Solenoid Body (66) Inspect for debris or sediment. Replace or flush the control solenoid body assembly (66). Control Valve Body Cleaning and Inspection