No Fourth, Fifth, and Sixth Gear

WARNING: This page is about a different variant/trim than selected.

Checks	Causes
A/Trans Fluid Pan (29)	Verify proper fluid level and condition, inspect transmission assembly for leaks.
Control Valve Upper Body (304)	Inspect for sticking, damaged, or worn R-1/4-5-6 clutch regulator valve (327) and spring (326).
4-5-6 Clutch (56)	Inspect for cut, worn, or damaged turbine shaft fluid seal rings (442). Inspect for damaged piston (439), piston dam (437), dam retaining ring (436), and clutch spring (438). Inspect for worn or damaged 4-5-6 clutch plates (432-435). Inspect for damaged or leaking clutch housing (441). Inspect for improper selective 4-5-6 clutch backing plate retaining ring (431). Inspect for damaged or distorted turbine shaft.
A/Trans Fluid Pump Seal (18)	Inspect for cut, leaking, or damaged seal.
4-5-6 Clutch Hub (58)	Inspect the shaft for damage or wear. Inspect the hub assembly (475), dampener (476), and apply plate (477) for wear or damage.
A/Trans Cooling/Lubrication System	Inspect transmission oil cooler (radiator) and cooler lines/seals for restrictions, damage, kinks or leaks.
Control Valve Solenoid Body (314)	Pressure control solenoid 3 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 .
Torque Converter Housing (2)	Inspect for damaged or scored pump housing (203), cover (219), rotor (217), slide (212), and vanes (216). Inspect for damaged or porous pump cover assembly (219). Inspect pump surfaces for flatness. Inspect for excessive fluid pump rotor (217) clearance or damage. Ensure proper selective rotor is being utilized.
Output Shaft Assembly (70)	Inspect for damaged or stripped splines on the output shaft.