Transmission and Drivetrain: Technical Service Bulletins

• Recalls
  • Campaign - Special Policy Check List
• Customer Interest
  • Engine/Transaxle - Torque Steer On Acceleration
  • A/T - Improved Bottom Pan and Gasket
  • A/T - Oil Pan Leak
  • A/T Oil Pan - Leaks
  • A/T - Engine Flare/Whines or Slips On Turns
  • A/T - Harsh 3-2 Downshifts & Other Hard Shift Conditions
    • Overview
    • I. Very Harsh Part Throttle 3-2 Shift At 20-40 MPH
    • II. Harsh 3-2 and/or 4-2 Shifts
    • III. Intermittent Harsh Part Throttle 3-2 Shift
    • IV. Harsh 3-2 Shift At High Altitude* Only
    • V. Harsh 3-2 Shift At Low Altitude* Only
    • VI. Harsh 3-2 Shift Maneuver At 17-20 MPH
    • VII. Harsh 3-2 Coast Down Bump At 15-22 MPH
    • Viii. Harsh Upshifts At High Altitude* Only
  • A/T - Harsh Park/Neutral to Drive/Reverse Engagement
  • A/T - 440-T4 Modulator Valve Making Buzz Noise
  • A/T - THM440-T4 Slips On Take Off or Acceleration
  • A/T - 4T-60 1-2 Shift Problems
  • A/T - THM 440-T4 Slips or No Drive Condition
  • A/T - 4T60 No Third Gear/No Drive or Reverse Conditions
  • A/T - Shift Timing Problems
  • Starting - Screeching Noise During Cranking
  • A/T - THM 440 1st to 2nd Gear Shift Shudder
  • A/T - Shudder/Harsh Engagement
  • A/T - No Third Gear
  • A/T - THM 440-T4 Intermittent Loss of Drive/Reverse
  • A/T - THM 440-T4 Delayed 2-3 Shift/Loss of 3RD Gear
  • A/T - 440-T4 Harsh 1st to 2ng Gear Upshift
  • A/T - Whine/Whistle In PARK/NEUTRAL
  • A/T - THM 440-T4 Harsh 1-2 Shift
  • A/T - THM 440-T4 Second Gear Starts On Take-Off
  • A/T - Intermittent Loss of Drive
  • A/T - Harsh Engage, Double Bump or Shudder
  • A/T - THM 440-T4 Reverse Gear Problems
  • A/T - No Reverse Unless First Shifted Into Drive
  • A/T - THM 440-T4 Harsh Gear Engagement
  • Engine, A/T - Shift/Driveability Concerns/MIL ON
  • A/T - No Movement in Drive or 3rd Gear
• By Symptom
  • Abnormal wear/deterioration
    • A/T - Front Bushing Wear
  • Chattering
    • A/T - 4T-60 1-2 Shift Problems
  • Customer Interest
    • Engine/Transaxle - Torque Steer On Acceleration
    • A/T - Improved Bottom Pan and Gasket
    • A/T - Oil Pan Leak
    • A/T Oil Pan - Leaks
    • A/T - Engine Flare/Whines or Slips On Turns
    • A/T - Harsh 3-2 Downshifts & Other Hard Shift Conditions
      • Overview
      • I. Very Harsh Part Throttle 3-2 Shift At 20-40 MPH
      • II. Harsh 3-2 and/or 4-2 Shifts
      • III. Intermittent Harsh Part Throttle 3-2 Shift
      • IV. Harsh 3-2 Shift At High Altitude* Only
      • V. Harsh 3-2 Shift At Low Altitude* Only
      • VI. Harsh 3-2 Shift Maneuver At 17-20 MPH
      • VII. Harsh 3-2 Coast Down Bump At 15-22 MPH
      • Viii. Harsh Upshifts At High Altitude* Only
    • A/T - Harsh Park/Neutral to Drive/Reverse Engagement
    • A/T - 440-T4 Modulator Valve Making Buzz Noise
    • A/T - THM440-T4 Slips On Take Off or Acceleration
    • A/T - 4T-60 1-2 Shift Problems
    • A/T - THM 440-T4 Slips or No Drive Condition
    • A/T - 4T60 No Third Gear/No Drive or Reverse Conditions
    • A/T - Shift Timing Problems
    • Starting - Screeching Noise During Cranking
    • A/T - THM 440 1st to 2nd Gear Shift Shudder
    • A/T - Shudder/Harsh Engagement
    • A/T - No Third Gear
    • A/T - THM 440-T4 Intermittent Loss of Drive/Reverse
    • A/T - THM 440-T4 Delayed 2-3 Shift/Loss of 3RD Gear
    • A/T - 440-T4 Harsh 1st to 2ng Gear Upshift
    • A/T - Whine/Whistle In PARK/NEUTRAL
    • A/T - THM 440-T4 Harsh 1-2 Shift
    • A/T - THM 440-T4 Second Gear Starts On Take-Off
    • A/T - Intermittent Loss of Drive
    • A/T - Harsh Engage, Double Bump or Shudder
    • A/T - THM 440-T4 Reverse Gear Problems
    • A/T - No Reverse Unless First Shifted Into Drive
    • A/T - THM 440-T4 Harsh Gear Engagement
    • Engine, A/T - Shift/Driveability Concerns/MIL ON
    • A/T - No Movement in Drive or 3rd Gear
  • Difficult gear selection
    • A/T - No Reverse Unless First Shifted Into Drive
    • A/T - Modification Possible For Reduced Shifter Effort
  • Driveability
    • Engine, A/T - Shift/Driveability Concerns/MIL ON
  • Erratic Shifting
    • A/T - 4T60 No Third Gear/No Drive or Reverse Conditions
    • A/T - Shift Timing Problems
    • A/T - THM 440-T4 Second Gear Starts On Take-Off
    • Engine, A/T - Shift/Driveability Concerns/MIL ON
  • Hard Shifting
    • A/T - Harsh 3-2 Downshifts & Other Hard Shift Conditions
      • Overview
      • I. Very Harsh Part Throttle 3-2 Shift At 20-40 MPH
      • II. Harsh 3-2 and/or 4-2 Shifts
      • III. Intermittent Harsh Part Throttle 3-2 Shift
      • IV. Harsh 3-2 Shift At High Altitude* Only
      • V. Harsh 3-2 Shift At Low Altitude* Only
      • VI. Harsh 3-2 Shift Maneuver At 17-20 MPH
      • VII. Harsh 3-2 Coast Down Bump At 15-22 MPH
      • Viii. Harsh Upshifts At High Altitude* Only
    • A/T - Harsh Park/Neutral to Drive/Reverse Engagement
    • A/T - THM440-T4 Slips On Take Off or Acceleration
    • A/T - Shift Timing Problems
    • A/T - Shudder/Harsh Engagement
    • A/T - 440-T4 Harsh 1st to 2ng Gear Upshift
    • A/T - THM 440-T4 Harsh 1-2 Shift
    • A/T - Harsh Engage, Double Bump or Shudder
    • A/T - THM 440-T4 Harsh Gear Engagement
  • Incorrect gear selection
    • A/T - THM 440-T4 Second Gear Starts On Take-Off
  • Inoperative
    • A/T - THM 440-T4 Slips or No Drive Condition
    • A/T - No Movement in Drive or 3rd Gear
  • Leaks
    • A/T - Oil Pan Leak
    • A/T Oil Pan - Leaks
  • No shift/Incorrect gear engagement
    • A/T - 4T60 No Third Gear/No Drive or Reverse Conditions
    • A/T - No Third Gear
    • A/T - THM 440-T4 Intermittent Loss of Drive/Reverse
    • A/T - THM 440-T4 Delayed 2-3 Shift/Loss of 3RD Gear
    • A/T - Slipping or No-Shift/Metal Sealing Rings
    • A/T - THM 440-T4 Reverse Gear Problems
  • Noise
    • A/T - Engine Flare/Whines or Slips On Turns
    • A/T - 440-T4 Modulator Valve Making Buzz Noise
    • Starting - Screeching Noise During Cranking
    • A/T - Whine/Whistle In PARK/NEUTRAL
    • A/T - Grinding/Growling Noise in Park on Incline
  • Poor steering/ride control
    • Engine/Transaxle - Torque Steer On Acceleration
  • Recalls
    • Campaign - Special Policy Check List
  • Slipping
    • A/T - Engine Flare/Whines or Slips On Turns
    • A/T - Harsh Park/Neutral to Drive/Reverse Engagement
    • A/T - THM440-T4 Slips On Take Off or Acceleration
    • A/T - 4T-60 1-2 Shift Problems
    • A/T - THM 440-T4 Slips or No Drive Condition
    • A/T - Shudder/Harsh Engagement
    • A/T - THM 440-T4 Delayed 2-3 Shift/Loss of 3RD Gear
    • A/T - Intermittent Loss of Drive
    • A/T - THM 440-T4 Reverse Gear Problems
  • Vibration
    • A/T - Harsh Engage, Double Bump or Shudder
• 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
  • ACDelco(R) Remanufactured Transmissions - Program Update
    • Overview
    • Warranty Coverage
    • New Warranty Registration
    • Warranty Claim Submission Procedures
  • A/T & M/T - AC Delco Remanufactured Transmissions
    • Overview
    • Warranty Coverage
    • Warranty Claim Submission Procedures
  • Electrical - Wire Probing Device
  • Campaign - Special Policy Check List
  • Engine/Transaxle - Torque Steer On Acceleration
  • A/T - New R&R Sun Gear Bearing & Pinion Gear Washers
  • A/T - Improved Bottom Pan and Gasket
  • A/T - New Bottom Pan & Controlled Compression Gasket
  • A/T - Oil Pan Leak
  • A/T Oil Pan - Leaks
  • A/T - Transaxle Oil Filter Differences
  • A/T - Engine Flare/Whines or Slips On Turns
  • A/T - Harsh 3-2 Downshifts & Other Hard Shift Conditions
    • Overview
    • I. Very Harsh Part Throttle 3-2 Shift At 20-40 MPH
    • II. Harsh 3-2 and/or 4-2 Shifts
    • III. Intermittent Harsh Part Throttle 3-2 Shift
    • IV. Harsh 3-2 Shift At High Altitude* Only
    • V. Harsh 3-2 Shift At Low Altitude* Only
    • VI. Harsh 3-2 Shift Maneuver At 17-20 MPH
    • VII. Harsh 3-2 Coast Down Bump At 15-22 MPH
    • Viii. Harsh Upshifts At High Altitude* Only
  • A/T - Harsh Park/Neutral to Drive/Reverse Engagement
  • A/T - 440-T4 Modulator Valve Making Buzz Noise
  • A/T - THM440-T4 Slips On Take Off or Acceleration
  • A/T - 4T-60 1-2 Shift Problems
  • A/T - THM 440-T4 Slips or No Drive Condition
  • A/T Oil Cooler - Flushing Procedure
  • A/T - 4T60 No Third Gear/No Drive or Reverse Conditions
  • A/T - Shift Timing Problems
  • Starting - Screeching Noise During Cranking
  • A/T - THM 440 1st to 2nd Gear Shift Shudder
  • A/T - Shudder/Harsh Engagement
  • A/T - New Input Clutch and 3rd Clutch Seal Installers
  • A/T - No Third Gear
  • A/T - THM 440-T4 New 2nd Clutch Piston Seal
  • A/T - THM 440-T4 Intermittent Loss of Drive/Reverse
  • A/T - THM 440-T4 Delayed 2-3 Shift/Loss of 3RD Gear
  • A/T - Updated Line Pressure Testing
  • A/T - Revised Drive Link Wear Specifications
  • A/T - 440-T4 Harsh 1st to 2ng Gear Upshift
  • A/T - Whine/Whistle In PARK/NEUTRAL
  • A/T - Replacement Transmission Part Numbers
    • Overview
    • General Information
    • Hydra-Matic 4T60-E
    • Hydra-Matic 4T60 (THM 440-T4)
    • Hydra-Matic 4L60 (THM 700-R4)
    • THM 200-4R
    • Hydra-Matic 3T40 (THM 125C)
  • A/T - Core Return Product Feedback Form
  • A/T - Service Replacement
    • Overview
    • General Information
    • SRTA Model Replacement Chart (4T60)
    • SRTA Chart (4T60-E)
    • SRTA Chart 3T40 (THM 125C)
    • SRTA Chart THM 200-4R
    • SRTA Chart 4L60 (THM 700-R4)
    • SRTA Chart 4T80-E
    • SRTA Chart 4T60 (THM F-7)
  • A/T - DFI Trouble Shooting
    • Overview
    • 1982 - 1984 Diagnostic Codes
    • 1985 - On /Diagnostic Codes
    • Status Lights/ Engine Data
  • A/T - Engine Vacuum Testing
  • A/T - How To Use A Pressure Gauge
  • A/T - Drive Axle and Wheel Lug Nut Torque Specifications
  • A/T - Slipping or No-Shift/Metal Sealing Rings
  • A/T - Front Bushing Wear
  • 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
  • A/T - Dexron IIE Transaxle Fluid
  • A/T - Fluid Checking Procedure
  • A/T - Servicing Vehicle With Contaminated Fluid
  • A/T - DEXRON III Fluid Introduction
  • A/T - THM 440-T4 Harsh 1-2 Shift
  • A/T - THM 440-T4 Second Gear Starts On Take-Off
  • A/T - Evaluating Peened Spacer Plates
  • Drivetrain - Recommended Axle Lubricant
  • A/T - Intermittent Loss of Drive
  • A/T - 4T60 New 1-2 and Reverse Bands
  • A/T - Harsh Engage, Double Bump or Shudder
  • A/T - THM 440-T4 Reverse Gear Problems
  • A/T - Growling Noise In Park On an Incline
  • A/T - No Reverse Unless First Shifted Into Drive
  • A/T - THM 440-T4 Harsh Gear Engagement
  • Drivetrain - New Seal Protector for Drive Axle R&R
  • A/T - Modification Possible For Reduced Shifter Effort
  • 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