No Engine Braking in Manual Second or Low Range. Buick Regal (China) (CNG) 1999

For 1990-2009 cars only

Makes 🢒 Buick 🢒 1999 🢒 Regal (China) (CNG) 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T65-E 🢒 No Engine Braking in Manual Second or Low Range

No Engine Braking in Manual Second or Low Range

Checks

Cause

DEFINITION: A large engine RPM increase and forward vehicle speed decrease do not immediately occur when the transmission is shifted from third or fourth gear in Drive or Manual Third range to either first or second gear, Manual Second, or Low range.

Accumulator and Manual 2-1 Band Servo Assembly

•	A loose or damaged manual 2-1 band servo oil pipe (125)

•	Loose manual 2-1 band servo cover or accumulator cover bolts (103, 131)

•	A damaged accumulator cover spacer plate assembly (134)

•	A damaged or missing servo piston seal (107) or a servo piston cylinder O-ring seal (113)

•	A missing servo exhaust screen assembly (115), allowing debris into the cylinder

•	A misassembled manual 2-1 servo assembly (103-115)

Manual 2-1 Band Assembly

•	A band assembly (680) that is worn or burned

•	A band assembly (680) that is disengaged from the anchor pin (102)

•	A band anchor pin (102) that is loose or missing