Second and Third Gear Only (1-2 Solenoid Stuck Off). Buick Terraza Ext. 2007

For 1990-2009 cars only

Makes 🢒 Buick 🢒 2007 🢒 Terraza Ext. 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T65-E 🢒 Second and Third Gear Only (1-2 Solenoid Stuck Off)

Checks

Cause

DEFINITION: The transmission only provides second and third gear in Drive range. The shift pattern as the vehicle accelerates from a stop is 2-2-3-3. Second gear ratio is 1.568:1 and third gear ratio is 1.000:1.

Control Valve Body Assembly

•	A faulty 1-2, 3-4 shift solenoid valve assembly (315A) is stuck Off.

•	A missing or damaged shift solenoid valve O-ring seal (316)

•	Plugged or damaged solenoid valve screen/seal assembly (382)

•	Debris is found in the control valve body (301) or the control valve body spacer plate and gasket assembly (396)

Case Cover Assembly

A stuck, binding, or missing actuator feed limit valve line-up (414-416)