First and Fourth Gear Only

For 1990-2009 cars only

Makes 🢒 Buick 🢒 1997 🢒 Riviera 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T65-E 🢒 First and Fourth Gear Only - 1-2 Solenoid Stuck On

Checks

Cause

DEFINITION: The transmission only provides first and fourth gear in Drive range. The shift pattern as the vehicle accelerates from a stop is 1-1-4-4. First gear ratio is 2.921:1 and fourth gear ratio is 0.705:1

Control valve body assembly

•	A faulty 1-2. 3-4shift solenoid valve asembly (315A) is stuck On

•	Debris is found in the control valve body (301) or the spacer plate assembly (370)