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Home >> Buick >> 2007 >> Allure CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 33 (Automatic Transaxle - 4T65-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Diagnostic Information And Procedures >> No Engine Braking in Manual Second or Low Range

No Engine Braking in Manual Second or Low Range

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
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
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