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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 6T70 - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> No Drive in All Ranges

No Drive in All Ranges

Checks Causes
For an explanation of which clutches are applied during the transmission gear ranges, refer to Range Reference .
Case Assembly (51)
  • Inspect for cracked or broken Case (51)
  • Inspect for stripped or sheared splines
  • Inspect for binding Manual Shift Detent Lever Assembly (511)
  • Inspect for missing Manual Shift Shaft Pin (510)
  • Inspect for interference or binding Park Pawl Actuator Assembly (509)
  • Inspect for disengaged or broken 1-2-3-4 Clutch Piston Spring Retainer (459)
  • Inspect for loose or damaged case bushing.
  • Inspect for missing Lube Orifice Plug
Torque Converter (29)
  • Inspect for stripped or sheared splines on Turbine Shaft
  • Inspect for missing Torque Converter to Flywheel bolts.
Torque Converter Housing (221)
  • Inspect for loose, missing or broken Torque Converter and Differential Housing bolts (26).
  • Inspect for loose, missing or broken Fluid Pump bolts (204).
3-5-R/4-5-6 Housing Assembly (422)
  • Inspect for damaged or broken Input Shaft Thrust Bearing Assembly (32)
  • Inspect for stripped, sheared or loose splines on the Input Shaft to the 3-5 Reverse/4-5-6 Clutch Housing (422)
Oil Pump Assembly (203)
  • Inspect for fluid leaks/improper fluid level
  • Inspect for disengaged, worn, binding or failed Drive Sprocket (216), Driven Sprocket (215) or Drive Link (217)
  • Inspect for leaking Fluid Outlet Seal Assembly (57)
  • Inspect for damaged or worn Drive (219, 220) and Driven Sprocket Thrust Washers (214)
  • Inspect for loose or missing Oil Pump Bolts (204)
  • Inspect for stripped or sheared splines on the Oil Pump Shaft or Driven Sprocket (215)
  • Inspect for damaged, clogged or improperly installed Oil Filter Assembly (201)
  • Inspect for damaged or leaking Oil Filter Neck Seal (202)
Low & Reverse Clutch Assembly (455) Inspect for stripped or sheared splines to the Reaction Carrier (467)
Input Carrier Assembly (470)
  • Inspect for stripped or sheared splines to ring gear
  • Inspect for improperly installed carrier pinion gear pins
  • Inspect for damaged or broken Pinion Gears.
  • Inspect for stripped or sheared splines on the Input Sun Gear (471).
  • Inspect for damaged or broken Output Internal Gear.
  • Inspect for broken or disengaged Output Internal Gear Retainer Ring.
  • Inspect for damaged or broken Input Carrier Thrust Bearing Assembly (468) and Output Carrier Thrust Bearing Assembly (473).
  • Inspect for damaged or broken Input Carrier Thrust Bearings (469, 472).
Reaction Carrier Assembly (467)
  • Inspect for stripped or sheared Reaction Carrier Assembly (467) splines.
  • Inspect for damaged or broken Input Carrier Thrust Bearings (468).
  • Inspect for damaged or broken Pinion Gear teeth.
  • Inspect for damaged or broken Reaction Internal Gear teeth.
  • Inspect for disengaged or broken Reaction Internal Gear retainer ring.
Reaction Sun Gear Assembly (466)
  • Inspect for damaged or broken weld at Sun Gear.
  • Inspect for loose or worn Reaction Sun Gear Assembly bushing.
Output Carrier Assembly (474)
  • Inspect for stripped or sheared splines to reaction internal ring gear.
  • Inspect for damaged or broken Input Sun Gear Thrust Bearings (472).
  • Inspect for damaged or broken Pinion Gear teeth.
  • Inspect for damaged or broken Input Carrier Thrust Bearings (473).
  • Inspect for broken or damaged Output Internal Gear.
Output Sun Gear Assembly (475)
  • Inspect for stripped or sheared Output Sun Gear Assembly (475) splines.
  • Inspect for broken Output Sun Gear Assembly (4755) hub or weld.
Low and Reverse Clutch Assembly (455) Inspect for disengaged or broken Low and Reverse Clutch Assembly (455).
Differential Carrier Assembly (486)
  • Inspect for stripped or sheared splines on Differential Side Gear.
  • Inspect for stripped or sheared splines Differential Carrier to PTU (AWD only).
  • Inspect for damaged or broken Pinion Gear teeth.
  • Inspect for broken, worn or damaged Final Drive Inner and Outer Thrust Washers (492).
Control Solenoid (w/Body and TCM) Valve Assembly