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Home >> Chevrolet >> 2017 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 79 (Automatic Transmission - 6T45 (MH7) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> No Drive in All Ranges

No Drive in All Ranges

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
Checks Causes
Case Assembly (50)
  • Inspect for cracked or broken Case (50).
  • Inspect for stripped or sheared splines.
  • Inspect for binding Manual Shift Detent Lever Assembly (609).
  • Inspect for missing Manual Shift Shaft Pin (611).
  • Inspect for missing Manual Shaft Lever Pin (610).
  • Inspect for interference or binding Park Pawl Actuator Assembly (607).
  • Inspect for broken or disengaged 1 - 2 - 3 - 4 Clutch Backing Plate Retainer Ring (561).
  • Inspect for loose or damaged case bushing.
  • Inspect A/Trans Fluid Pump Seal Assembly (25) for damage.
Torque Converter (28)
  • Inspect for stripped or sheared splines on Turbine Shaft.
  • Inspect for missing Torque Converter to Flywheel bolts.
  • Inspect for damaged or disengaged Torque Converter Hub to Oil Pump Drive Gear.
Torque Converter Housing (208)
  • Inspect for stripped or sheared Differential Ring Gear splines.
  • Inspect for broken or disengaged Differential Ring Gear Retainer (206).
  • Inspect for loose, missing or broken Torque Converter and Differential Housing bolts (26).
  • Inspect for loose, missing or broken Fluid Pump bolts (200).
35R/456 Housing Assembly (516)
  • Inspect for damaged or broken Input Shaft Thrust Bearing Assembly (538).
  • Inspect for stripped or sheared splines on the Input Shaft to the 3 - 5 Reverse/4 - 5 - 6 Clutch Housing (516).
Oil Pump Assembly (201)
  • Inspect for fluid leaks / improper fluid level.
  • Inspect for leaking Fluid Outlet Seal Assembly (24).
  • Inspect for loose or missing Oil Pump Bolts (200).
  • Inspect for damaged, restricted or improperly installed Oil Filter Assembly (203).
  • Inspect for damaged or leaking Oil Filter Neck Seal.
  • Inspect for broken or seized Fluid Pump Drive Gear (315) and Fluid Pump Driven Gear (316).
Low & Reverse Clutch Assembly (543) Inspect for stripped or sheared splines to the Reaction Carrier (567).
Input Carrier Assembly (570)
  • Inspect for stripped or sheared castle 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 (571).
  • 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 (568) and Output Carrier Thrust Bearing Assembly (573).
  • Inspect for damaged or broken Input Carrier Thrust Bearings (569, 572).
Reaction Carrier Assembly (567)
  • Inspect for stripped or sheared Reaction Carrier Assembly (567) splines.
  • Inspect for damaged or broken Input Carrier Thrust Bearings (568).
  • Inspect for damaged or broken Pinion Gear teeth.
  • Inspect for damaged or broken Reaction Internal Gear teeth.
  • Inpsect for disengaged or broken Reaction Internal Gear retainer ring.
Reaction Sun Gear Assembly (566)
  • Inspect for damaged or broken weld at Sun Gear.
  • Inspect for loose or worn Reaction Sun Gear Assembly bushing.
Output Carrier Assembly (574)
  • Inspect for stripped or sheared splines to reaction internal ring gear.
  • Inspect for damaged or broken Input Sun Gear Thrust Bearings (572).
  • Inspect for damaged or broken Pinion Gear teeth.
  • Inspect for damaged or broken Input Carrier Thrust Bearings (573).
  • Inspect for broken or damaged Output Internal Gear.
Output Sun Gear Assembly (555)
  • Inspect for stripped or sheared Output Sun Gear Assembly (555) splines.
  • Inspect for broken Output Sun Gear Assembly (555) hub or weld.
Low-Reverse and 1 - 2 - 3 - 4 Clutch Housing (551) Inspect for disengaged or broken 1 - 2 - 3 - 4 Clutch Piston Spring Retainer (554).
Drive Link Assembly (225)
  • Inspect for broken, worn or damaged Drive Link Assembly (225).
  • Inspect for broken, worn or damaged Drive Sprocket (224).
  • Inspect for broken, worn or damaged Driven Sprocket Assembly (229).
  • Inspect for broken Drive Gear Hub (222).
Differential Carrier Assembly (232)
  • Inspect for stripped or sheared splines on Differential Side Gear.
  • Inspect for stripped or sheared splines Final Drive Sun Gear (230).
  • Inspect for stripped or sheared splines Differential Carrier to PTU (AWD only).
  • Inspect for stripped broken or disengaged Final Drive Retainer (581).
  • Inspect for damaged or broken Pinion Gear teeth.
  • Inpsect for damaged or broken Final Drive Rollers (585).
  • Inspect for broken, worn or damaged Final Drive Inner and Outer Thrust Washers (584).
Control Solenoid (w/Body and TCM) Valve Assembly
  • Check that the Manual Valve (432) is engaged with Manual Shift Detent Lever Assembly (609).
  • Inspect the Control Solenoid (w/Body and TCM) Valve Assembly (7) and verify that it is functioning properly.