No Third, Fifth, and Reverse Gear. Chevrolet Avalanche

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2008 🢒 Avalanche - 4WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 6L50/6L80/6L90 🢒 No Third, Fifth, and Reverse Gear

Checks

Causes

1-2-3-4 and 3-5-R Clutch Assembly (51)

•	Inspect for damaged or worn 3-5-R clutch plates (402-404).

•	Inspect for damaged 3-5-R clutch piston (421), apply ring (405), and spring (420).

•	Inspect for cut, worn, or damaged 3-5-R clutch piston dam O-ring seal (418), inner seal (419), and outer seal (422).

•	Inspect for improper selective 3-5-R clutch backing plate retaining ring (400).

•	Inspect for damaged 3-5-R clutch backing plate (401). Inspect for worn splines on the backing plate.

Control Valve Upper Body Assembly

Inspect for a worn, sticking or damaged 3-5 reverse clutch regulator valve and spring. Inspect the valve bore for debris or scoring.