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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 >> Slips in Drive or No Drive

Slips in Drive or No Drive

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Checks Action
Forward Clutch Plate Assemblies (309, 311 and 312) Inspect for wear - causing slow clutch apply. Replace the forward clutch plate assemblies (309, 311 and 312). Forward Clutch Assembly Disassemble
Forward Clutch Piston Assembly (303), Spring (304) and Dam Assembly (305) Inspect for cut or rolled seals. Replace the forward clutch piston assembly (303), spring (304) and dam assembly (305). Forward Clutch Assembly Disassemble
Transmission Fluid Pump Assembly (104) Inspect for internal damage - causing low or no pressure at the discharge port repair or replace the fluid pump assembly (104). Transmission Fluid Pump Disassemble
Fluid Filter Assembly (181) Inspect filter for clog, damage, looseness or improper sealing. Replace the fluid filter assembly (181). Transmission Fluid Pump Disassemble
Pressure Regulator Valve Train Inspect for:
  • Worn, sticking or binding valve (221)
  • Worn, sticking or binding shuttle valve (222)
  • Worn, sticking or damaged spring (220)

Control Valve Body Cleaning and Inspection
Control Valve Body (200) Inspect for porosity, damage, or contamination with debris. Replace or flush the control valve body (200). Control Valve Body Cleaning and Inspection