No Engine Braking; All Manual Ranges

WARNING: This page is about a different car, the 2007 Pontiac G5 Pursuit, 2007 Pontiac G5, and 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

Checks	Causes
Coast Clutch	No apply or slipping
Piston and Seal Assembly (504)	Binding, cracked, or leaking
Clutch Plates (508, 509)	Worn friction or broken splines
Springs (505)	Binding
Direct & Coast Clutch Housing and Input Shaft (502)	Damaged or cracked Fluid feed holes are restricted
Housing Retainer and Ball Assembly	Missing or loose
Coast Clutch Fluid Routing	Fluid leak or restriction
Valve Body Gaskets and Spacer Plate Channel Plate and Gasket Driven Sprocket Support	Porosity Misalignment Looseness Fluid restriction Fluid leak across the channels
Driven Sprocket Support Seals	Leaking
Input Shaft (502)	Leaking seals Damaged or misaligned sleeve
Oil Level or Line Pressure	Low Pressure Refer to High or Low Line Pressure .
3-4 Shift Valve (319)	Stuck in Fourth gear position, No coast clutch apply
Manual Valve or Shift Linkage (800)	Misaligned