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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Automatic Transmission - 6T40 - DTC P0973 To DTC P2764 And Troubleshooting Procedures) >> Diagnostic Information and Procedures >> Fluid Pressure High or Low

Fluid Pressure High or Low

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Checks Causes
Fluid Pump Assembly (201)
  • Inspect for loose fluid pump bolts (204).
  • Inspect for leaking or damaged fluid pump outlet seals (24) and oil filter seal.
  • Inspect for improperly installed, restricted or damaged oil filter (203).
  • Inspect for sticking line pressure blow off valve (304).
  • Inspect for worn, sticking or damaged pressure regulator valve (309) or pressure regulator valve spring (308).
  • Inspect for damaged or restricted oil ports in the oil pump body (303).
  • Inspect for missing, leaking, or damaged auxiliary fluid inlet pump seal (371)-Hybrid Models.
Torque Converter Housing (208)
  • Inspect for missing or restricted differential lube oil circuit orifice.
  • Inspect for missing front differential carrier baffle (205).
Control Solenoid Valve Assembly (w/Body and TCM) (7)
  • Inspect for leaking or damaged filter plate assembly seals (8).
  • Verify VBS operation is not stuck high or low.
Case Assembly (50)
  • Inspect for proper fluid level.
  • Inspect for missing lube oil circuit orifice or front differential carrier baffle (62).
  • Inspect for leaking or damaged valve body spacer plate assembly (12).
  • Inspect for damaged or leaking fluid check valve (55).
  • Inspect for leaking, damaged or broken fluid level control valve (13).
Torque Converter Assembly (28)
  • Inspect for damaged torque converter clutch seal (inside converter assembly).
  • Inspect for damaged or disengaged torque converter hub to oil pump drive gear.