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Home >> Cadillac >> 2005 >> Escalade ESV >> Repair and Diagnosis >> External Pages >> Different car >> Section 140 (Automatic Transmission - 4L80-E/4L85-E - Service, Diagnosis & Trouble Shooting) >> Diagnostic Information and Procedures >> Harsh Shifts

Harsh Shifts

WARNING: This page is about a different car, the 2005 GMC Yukon XL, 2005 Chevrolet Suburban, and 2005 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Harsh Shifts

Checks Cause
Line Pressure Too high
Pressure Control Solenoid Valve (320)
  • Failed Off
  • Loose connector
PCM Loose connector
Accumulator Piston
  • Leaking
  • Stuck
Accumulator Spring Incorrect
Checkballs Missing
Calibration PROM Incorrect
Check the PCM for current DTCs.