Transmission and Drivetrain: Technical Service Bulletins

• Customer Interest
  • Engine - Metal to Metal Noise
  • A/T - Fluid Leak At the Cooler Line Connections
  • A/T - AOD/A4LD Shift Cable Locks In PARK Mode
• By Symptom
  • Abnormal wear/deterioration
    • A/T - Direct Clutch Failure/Excessive Case Bore Wear
    • A/T - AOD No End Play/Overdrive Band Burned
  • Customer Interest
    • Engine - Metal to Metal Noise
    • A/T - Fluid Leak At the Cooler Line Connections
    • A/T - AOD/A4LD Shift Cable Locks In PARK Mode
  • Difficult gear selection
    • A/T - AOD/A4LD Shift Cable Locks In PARK Mode
  • Erratic Shifting
    • A/T - Direct Clutch Failure/Excessive Case Bore Wear
  • Inoperative
    • A/T - AOD/A4LD Shift Cable Locks In PARK Mode
  • Leaks
    • A/T - Fluid Leak At the Cooler Line Connections
    • A/T - AOD Governor Pressure Leaks
  • No shift/Incorrect gear engagement
    • A/T - 3-2 Too Sensitive, or No Part Throttle Downshift
    • A/T - AOD No Fourth Gear
    • A/T - Harsh 1-2 Upshift or Slide Bump 1-2 Upshift
    • A/T - AOD No Manual Low Gear
  • Noise
    • Engine - Metal to Metal Noise
  • Slipping
    • A/T - Slipping or No-Shift/Metal Sealing Rings
• All Technical Service Bulletins
  • Adhesives and Sealants - Availability and Usage
  • Engine - Metal to Metal Noise
  • Lug Nuts - Proper Torqueing Procedure
  • Torque Converter - Cleaning and Replacement Guidelines
    • Overview
    • Diagnostic Procedure
    • Service Procedure
      • Replacement
      • Torque Converter & Transmission Cooling System Cleaning
  • A/T - Fluid Leak At the Cooler Line Connections
  • A/T Torque Converter - Leak Test Procedure
  • A/T - AOD Slip/Bump On Upshift/Downshift
  • A/T - A4LD/4R44E/5R55E New Center Support
  • A/T - AOD Diagnostic Information
  • A/T - New Rotunda Fluid Changer Service Tip
  • A/T - In Line Fluid Filter Kit
    • Overview
    • Service Procedure
  • A/T - Transmission Flush and Fill Tool Available
  • A/T - AOD New Information/Clutch Return Spring Tension
  • A/T - AOD Valve Body Shoulder Bolt Locations
  • A/T - AOD 3-4 Accumulator Change
  • A/T - Engine Vacuum Testing
  • A/T - AOD 4th Gear Complaints
  • A/T - Direct Clutch Failure/Excessive Case Bore Wear
  • A/T - How To Use A Pressure Gauge
  • A/T - EEC Trouble Codes
  • A/T - Diagnostic Trouble Codes for 1983-1992
  • A/T - AODE Cooler Return Line Filter Installation
  • A/T - Drive Axle and Wheel Lug Nut Torque Specifications
  • A/T - AOD Reverse Drum Changes
  • A/T - Pressure Tap Locations
  • A/T - AOD Rough 1-2 Shift After Overhaul
  • A/T - Overdrive in 2nd Gear and Lockout/Binds in 1st
  • A/T - AOD Torque Converter Identification
  • A/T - AOD Rebuild Tips
  • A/T - 3-2 Too Sensitive, or No Part Throttle Downshift
  • A/T - AOD Relief Valves For Valve Bodies
  • A/T - AOD High Pitched Noise In All Ranges
  • A/T - Slipping or No-Shift/Metal Sealing Rings
  • A/T - AOD No End Play/Overdrive Band Burned
  • A/T - AOD No Fourth Gear
  • A/T - Front Bushing Wear
  • A/T - AOD Burned Overdrive Band/End Play after Rebuild
  • A/T - AOD Loss of Governor Pressure Through Valve Body
  • A/T - Harsh 1-2 Upshift or Slide Bump 1-2 Upshift
  • A/T - Sprag Rotation
  • A/T - AOD Kills Engine In Reverse and/or Forward Gears
  • A/T - AOD Failure In Rear Of Transmission/No Lubrication
  • A/T - AOD No Manual Low Gear
  • A/T - Rear Planet Failure/Lack Of Lubrication
  • A/T - AOD Governor Pressure Leaks
  • 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, M/T - New `Mercon' Transmission Fluid
  • A/T - AOD/A4LD Shift Cable Locks In PARK Mode
  • Main Control Assembly - Special Attaching Bolts
  • A/T - AOD Separator Plate Gasket Changes
  • A/T - AOD New Overdrive Band Anchor Pin
  • A/T - AOD Case Thread Update
  • M/T - Hummer 5 Speed Mainshaft Revision
  • M/T - Mercon(R) V ATF Usage Information