Transmission and Drivetrain: Technical Service Bulletins

• Recalls
  • Recall 91V198000: Transmission Shift Lever Defect
• Customer Interest
  • A/T Cooler Line - Fluid Leaks At Hose Clamps
  • A/T - Leak at Converter Seal
  • A/T - Fluid Leak at Converter Seal, Replace Trans
  • Hub Assembly Seal - Squeak/Squawk Noise
  • A/T - Delayed Engagement In Drive/Reverse
  • A/T - Intermittent or No TCC Apply, Possible DTC 26/39
  • A/T - Second Gear Vibration
  • Transaxle - Bearing Whine Audible in 1st, 2nd, 3rd Gear
  • A/T - 4T60 High Shift Effort Out of Park
  • A/T - 4T60 Slipping/No Reverse
  • A/T - Leak Near 1-2 Servo Casting Slot
  • A/T - Fluid Leak At Side Cover to Plate Gasket
  • Engine, A/T - Shift/Driveability Concerns/MIL ON
  • A/T - No Movement in Drive or 3rd Gear
• By Symptom
  • Abnormal wear/deterioration
    • A/T - 3T40 Center Gearbox Distress, Diagnosis Tips
    • A/T - Front Bushing Wear
  • Customer Interest
    • A/T Cooler Line - Fluid Leaks At Hose Clamps
    • A/T - Leak at Converter Seal
    • A/T - Fluid Leak at Converter Seal, Replace Trans
    • Hub Assembly Seal - Squeak/Squawk Noise
    • A/T - Delayed Engagement In Drive/Reverse
    • A/T - Intermittent or No TCC Apply, Possible DTC 26/39
    • A/T - Second Gear Vibration
    • Transaxle - Bearing Whine Audible in 1st, 2nd, 3rd Gear
    • A/T - 4T60 High Shift Effort Out of Park
    • A/T - 4T60 Slipping/No Reverse
    • A/T - Leak Near 1-2 Servo Casting Slot
    • A/T - Fluid Leak At Side Cover to Plate Gasket
    • Engine, A/T - Shift/Driveability Concerns/MIL ON
    • A/T - No Movement in Drive or 3rd Gear
  • Difficult gear selection
    • A/T - 4T60 High Shift Effort Out of Park
  • Driveability
    • Engine, A/T - Shift/Driveability Concerns/MIL ON
  • Erratic Shifting
    • A/T - Early Upshift/No Kickdown
    • A/T - 440T4 Harsh 3-2 Detent Downshift
    • A/T - Converter Clutch Shudder
    • Engine, A/T - Shift/Driveability Concerns/MIL ON
  • Hard Shifting
    • A/T - On Car Service Info For Harsh 3-2 Downshifts
      • Overview
      • Bulletin Covers:
      • IA. Very Harsh Part Throttle 3-2 Shift At 20-40 MPH --
      • IB. Harsh 3-2 and/or 4-2 Shifts
      • IC. Intermittent Harsh Part Throttle 3-2 Shift --
      • Service Parts Information:
        • Overview
        • II. Harsh 3-2 Shift **High Altitude Only**
        • Service Parts Information:
        • Service Manual Reference:
      • III. Harsh 3-2 Shift **Low Altitude* Only**
      • Service Parts Information:
      • Service Manual Reference:
        • Overview
        • IV. Harsh 3-2 Shift Maneuver At 17-20 MPH --
        • Service Parts Information:
      • V.Harsh 3-2 Coastdown Bump 3.8L or 4.5L At 15-22 MPH --
      • Service Parts Information:
        • Overview
        • VI. Harsh Upshifts - High Altitude Only
        • Service Parts Information:
  • Incorrect gear selection
    • A/T - No Converter Clutch Apply When Unit Is Hot
  • Inoperative
    • A/T - 4T60 Intermittent Delayed Engagement
    • A/T - No Converter Clutch Apply When Unit Is Hot
    • A/T - No Movement in Drive or 3rd Gear
  • Leaks
    • A/T Cooler Line - Fluid Leaks At Hose Clamps
    • A/T - Leak at Converter Seal
    • A/T - Fluid Leak at Converter Seal, Replace Trans
    • A/T - Leak Near 1-2 Servo Casting Slot
    • A/T - Fluid Leak At Side Cover to Plate Gasket
  • Loose
    • A/T - 4T60 Slipping/No Reverse
  • No shift/Incorrect gear engagement
    • A/T - Intermittent or No TCC Apply, Possible DTC 26/39
    • A/T - Early Upshift/No Kickdown
    • A/T - THM Late or No Upshifts
    • A/T - 440T4/4T60 Late or No Upshift
    • A/T - 125C, 440T4 No Upshift
    • A/T - Slipping or No-Shift/Metal Sealing Rings
  • Noise
    • Hub Assembly Seal - Squeak/Squawk Noise
    • Transaxle - Bearing Whine Audible in 1st, 2nd, 3rd Gear
    • A/T - 440T4 Coast-Down Clunk
    • A/T - Grinding/Growling Noise in Park on Incline
  • Pull, grab
    • Drivetrain - Slight Torque Steer During Acceleration
  • Recalls
    • Recall 91V198000: Transmission Shift Lever Defect
  • Slipping
    • A/T - Delayed Engagement In Drive/Reverse
  • Vibration
    • A/T - Second Gear Vibration
  • Warping
    • A/T - New Clutch Plates
• All Technical Service Bulletins
  • Drivetrain - Information on Driveline Clunk Noise
  • Vehicle - Engine And Sub Systems Flushing Info. (CANADA)
  • Vehicle - Engine And Sub-Systems Flushing Recommendations
  • M/T - Operating Characteristics Information
  • A/T - Fluid Oil Cooler Flow Test
  • A/T - 2-3 Upshift or 3-2 Downshift Clunk Noise
  • A/T - Slight Vehicle Movement In Park At Start Up
  • Drivetrain - Slight Torque Steer During Acceleration
  • A/T - 3T40 Center Gearbox Distress, Diagnosis Tips
  • A/T - Oil Cooler Flushing Frequently Asked Questions
  • A/T Cooler Line - Fluid Leaks At Hose Clamps
  • A/T - Leak at Converter Seal
  • A/T - Fluid Leak at Converter Seal, Replace Trans
  • Hub Assembly Seal - Squeak/Squawk Noise
  • A/T - Delayed Engagement In Drive/Reverse
  • A/T - New Clutch Plates
  • A/T - 4T60 New Input and 3rd Clutch Seals
  • A/T - 3T40/125C New Roller Clutch
  • A/T - 4T60E 3RD Clutch Plate Identifiers
  • A/T Fluid - Level Checking Procedures
  • A/T - Intermittent or No TCC Apply, Possible DTC 26/39
  • A/T - On Car Service Info For Harsh 3-2 Downshifts
    • Overview
    • Bulletin Covers:
    • IA. Very Harsh Part Throttle 3-2 Shift At 20-40 MPH --
    • IB. Harsh 3-2 and/or 4-2 Shifts
    • IC. Intermittent Harsh Part Throttle 3-2 Shift --
    • Service Parts Information:
      • Overview
      • II. Harsh 3-2 Shift **High Altitude Only**
      • Service Parts Information:
      • Service Manual Reference:
    • III. Harsh 3-2 Shift **Low Altitude* Only**
    • Service Parts Information:
    • Service Manual Reference:
      • Overview
      • IV. Harsh 3-2 Shift Maneuver At 17-20 MPH --
      • Service Parts Information:
    • V.Harsh 3-2 Coastdown Bump 3.8L or 4.5L At 15-22 MPH --
    • Service Parts Information:
      • Overview
      • VI. Harsh Upshifts - High Altitude Only
      • Service Parts Information:
  • A/T - Second Gear Vibration
  • A/T - Service Replacement Transaxle Update
    • Overview
    • Srta Model Replacement Chart (4T60):
    • Srta Model Replacement Chart (4T60E):
  • A/T - Revised Scavenger Oil Scoop
  • Transaxle - Bearing Whine Audible in 1st, 2nd, 3rd Gear
  • A/T - New Solenoid Testing Kit
  • A/T - Core Return Product Feedback Form
  • A/T - 4T60 Solenoid Resistance Tests
  • A/T - 4T60 Intermittent Delayed Engagement
  • A/T - Engine Vacuum Testing
  • A/T - Diagnosing Converter Lock-Up Problems
    • Overview
    • Test # 1 - Checking For 12 Volts at Terminal -A-
      • Regular Method
      • Quick Method
    • Test # 2 - Checking For 12 Volts Across Fuse
    • Test # 3 - Checking For 12 Volts Across Brake Switch
    • Test # 4 - Adjusting/Replacing the Brake Switch
    • Test # 5 - Checking Wires For Shorts and Opens
    • Test # 6 - Checking For Ground at Terminal -D-
      • Regular Method
      • Quick Method
    • Test # 7 - Grounding the -D- Wire
      • Regular Method
      • Quick Method
    • Test # 8 - Checking Cooler Line Pressure or Surge
    • Test # 9 - Checking the Solenoid
    • Test # 10 - Checking Electrical Switches on Trans.
    • Test # 11 - Checking Lockup Apply Valve
    • Test # 12 - Checking Signal Oil Circuit
    • Test # 13 - Checking the Computer
  • A/T - 440T4 No Line Pressure Rise
  • A/T - Early Upshift/No Kickdown
  • A/T - 440T4/4T60 Spacer Plate Matching
  • A/T - How To Use A Pressure Gauge
  • A/T - 440T4 Harsh 3-2 Detent Downshift
  • A/T - AXOD/E 44T4's and 125's Chain Stretch
  • A/T - 440T4 No Second Clutch Switch
  • A/T - 440T4 Channel Plate Gasket Blow-Out
  • A/T - 440T4 No Upshift/Wrong Gear
  • A/T - THM Late or No Upshifts
  • A/T - 440T4 Coast-Down Clunk
  • A/T - Drive Axle and Wheel Lug Nut Torque Specifications
  • A/T - 440T4/4T60 Late or No Upshift
  • A/T - No Converter Clutch Apply When Unit Is Hot
  • A/T - Converter Clutch Shudder
  • A/T - 125C, 440T4 No Upshift
  • A/T - Slipping or No-Shift/Metal Sealing Rings
  • A/T - Front Bushing Wear
  • A/T - 440T4 Plastic Oil Lube Dam
  • A/T - Math Formulas Part I
    • Overview
    • Shift Speed and Pressure
    • Speedometer Ratios
  • A/T - Twenty Steps To Successful Repairs
  • A/T - Math Part II
  • A/T - Choosing the Right ATF
  • Flywheel Bolt Torque Specs - Manual Update
  • A/T - New Transaxle Fluid
  • A/T - Procedure If ATF is Antifreeze Contaminated
  • A/T - DEXRON III Fluid Introduction
  • A/T - 4T60/4T60E Drive Link Noise
  • A/T - 4T60 High Shift Effort Out of Park
  • A/T - Evaluating Peened Spacer Plates
  • Drivetrain - Recommended Axle Lubricant
  • A/T - 4T60 New Design Bands
  • A/T - 4T60 Slipping/No Reverse
  • A/T - 4T60/3T40 Grinding/Growling On Incline
  • A/T - Leak Near 1-2 Servo Casting Slot
  • A/T - Fluid Leak At Side Cover to Plate Gasket
  • A/T - Revised End Play Specifications
  • Recall 91V198000: Transmission Shift Lever Defect
  • A/T - 4T60 New Thermo Element/Setting Procedure
  • Transaxle - Reuseable Bottom Pan Gasket
  • A/T - New Bottom Pan & Controlled Compression Gasket
  • M/T - Hydraulic Clutch Bleeding Procedure Improvement
  • Engine, A/T - Shift/Driveability Concerns/MIL ON
  • A/T - No Movement in Drive or 3rd Gear
  • A/T - Grinding/Growling Noise in Park on Incline
  • A/T - Water Or Coolant Contamination Information
  • A/T - DEXRON(R)-VI Fluid Information