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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 362 (Automatic Transmission - 6L80/6L90 - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> No Drive in All Ranges

No Drive in All Ranges

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No Drive in All Ranges

Checks Causes
A/Trans Fluid Pan Assembly (29) Verify proper fluid level and condition, inspect transmission assembly for leaks.
Torque Converter (with Fluid Pump) Housing Assembly (2) Inspect for damaged or scored pump housing (203), cover (219), rotor (217), slide (212), and vanes (216).
Fluid Filter Assembly (26)
  • Inspect for damaged or restricted fluid filter assembly (26).
  • Inspect for damaged fluid filter seal assembly (25) or improper sealing interface, leaks, and fluid aeration.
Automatic Transmission Fluid Pump Seal (5) Inspect for worn or damaged seal.
A/Trans Cooling/Lubrication System Inspect transmission oil cooler (radiator) and cooler line seals for restrictions, damage, kinks, or leaks.
Torque Converter Assembly (1) Inspect for overheating (blued), ballooning, leaks, or other damage.
1-2-3-4 and 3-5-R Clutch Assembly (51)
  • Inspect clutch pack retaining rings (400 and 429) for proper installation.
  • Inspect housing and clutch pistons and seals for damage or leaks.
Control Valve Lower Body Assembly (351) Inspect for stuck, sticky or damaged clutch select valve (352).
Manual Valve (354) Inspect the manual valve detent lever assembly (505) and connection to the manual valve (354).
A/Trans Manual Shift Shaft Position Switch Assembly (308) Inspect the switch assembly (308) and connection to the manual valve (354).
A/Trans Manual Shift Shaft Position Switch Assembly (308) Inspect PRNDL commands to and from vehicle using Tech 2.
Control Solenoid (w/Body and TCM) Valve Assembly (314) Inspect PRNDL commands to and from vehicle using Tech 2.
A/Trans Fluid Pump (Transfer) Seal Assembly (19) Inspect for damage or leaks.
Output Shaft Assembly (499) Inspect for spline wear or damage.
Output Carrier Assembly (490)
  • Inspect the carrier assembly for damaged pinion gears, thrust washers, pins, and rollers.
  • Inspect for damaged thrust bearings (486 and 488).
  • Inspect for damaged sun gears (487 and 489).
  • Inspect the carrier assembly for damaged output carrier rear sun gear thrust bearing (captured).
Low Clutch Sprag Assembly (467) Inspect for excessive wear or damage.
Input Carrier Assembly (52) Inspect carrier assembly for damaged pinion gears, thrust washers, pins, and rollers.
Input Sun Gear (53) Inspect for spline wear or damage.
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