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Home >> Cadillac >> 2018 >> Escalade Base, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 19 (Automatic Transmission - 6L80 (MYC) Or 6L90 (MYD) - Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> No Third, Fifth, And Reverse Gear

No Third, Fifth, And Reverse Gear

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Checks Causes
A/Trans Fluid Pan Assembly (29) Verify proper fluid level and condition, inspect transmission assembly for leaks.
Control Valve Upper Body Assembly (304)
  • Inspect for sticking, damaged, or worn 3-5-R regulator valve (336) and valve spring (326).
  • Inspect for damaged or stuck #7 ball check valve.
Control Valve Lower Body Assembly (307) Inspect for worn, damaged, or sticking clutch select solenoid valve 3 (352) and valve spring (353).
1-2-3-4 and 3-5-R Clutch Assembly (51)
  • Inspect for proper installation of 3-5-R clutch backing plate retaining ring (400).
  • Inspect for worn, damaged, or leaking clutch bearing seal assembly (428).
  • Inspect for damaged or worn 3-5-R clutch plates (401 - 404).
  • Inspect for damaged 3-5-R clutch piston (421), apply ring (405), and spring (420).
  • Inspect for cut, worn, or damaged 3-5-R clutch piston dam O-ring seal (418), inner seal (419), and outer seal (422).
  • Inspect for improper selective 3-5-R clutch backing plate retaining ring (400).
Control Solenoid (w/Body and TCM) Valve Assembly (314) Pressure control solenoid 2 commanded/failed HIGH (off) or leaking - Perform solenoid valve assembly function test. Refer to Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test .
A/Trans Fluid Pump (Transfer) Seal Assembly (19) Inspect for damage or leaks.
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