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Home >> Pontiac >> 2006 >> Vibe Base, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Automatic Transmission - Mu4 - Overhaul) >> Repair Instructions >> Second Coast Brake Removal

Second Coast Brake Removal

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Identifying Second Coast Brake Apply Pipe Bracket & Bolt
    GM164278Courtesy of GENERAL MOTORS CORP.
  1. Remove the 1 bolt and the second coast brake apply pipe bracket (2) from the transaxle case (1).
    2. Fig 2: View Of 2nd Coast Brake Apply Pipe
    GM164281Courtesy of GENERAL MOTORS CORP.
  2. Remove the 2nd coast brake apply pipe (1) from the transaxle case (2).
    3. Fig 3: Scribing Reference Mark On 2nd Coast Brake Piston Rod
    GM164284Courtesy of GENERAL MOTORS CORP.
  3. Place a reference mark (1) on the 2nd coast brake piston rod (2) where the piston rod meets the transaxle case.
    4. Fig 4: Checking 2nd Coast Brake Piston Stroke Using Feeler Gage
    GM164287Courtesy of GENERAL MOTORS CORP.
  4. Apply 392-785 kPa (57-114 psi) of compressed air into the 2nd coast brake apply passage (2).
  5. Measure the distance between the reference mark and the transaxle case using a feeler gage (1) to obtain the 2nd coast brake piston stroke.
    • The 2nd coast brake piston stroke should fall within 1.5-3.5 mm (0.059-0.138 in) (3)
    • If the 2nd coast brake piston stroke exceeds specification, inspect the 2nd coast brake band for excessive wear or damage
    6. Fig 5: Locating 2nd Coast Brake Servo Cover Snap Ring
    GM164324Courtesy of GENERAL MOTORS CORP.
  6. Remove the 2nd coast brake servo cover snap ring (1) from the transaxle case.
    7. IMPORTANT: When using compressed air to remove components, air pressure should not exceed 98 kPa (14psi).
    Fig 6: Blowing Air Into 2nd Coast Brake Servo Apply Passage
    GM164327Courtesy of GENERAL MOTORS CORP.
  7. Remove the following components from the transaxle case (2) by slowly applying low pressure compressed air into the 2nd coast brake servo apply passage (1):
    • The 2nd coast brake servo cover
    • The 2nd coast brake piston
    • The 2nd coast brake piston outer return spring
    8. Fig 7: View Of Forward And Direct Clutch Assemblies
    GM164334Courtesy of GENERAL MOTORS CORP.
  8. Remove the forward and direct clutch assemblies (3, 2) from the transaxle case by grasping the input shaft (1) and lifting the shaft upward.
    9. Fig 8: Locating 2nd Coast Brake Band Anchor Pin In Transaxle Case
    GM415828Courtesy of GENERAL MOTORS CORP.
  9. Remove the 2nd coast brake band anchor pin (2) from the transaxle case (1).
    10. Fig 9: View Of 2nd Coast Brake Band
    GM415829Courtesy of GENERAL MOTORS CORP.
  10. Remove the 2nd coast brake band from the transaxle case (1).
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