Repair and Diagnosis: Technical Service Bulletins

• How to Find Technical Service Bulletins by Category/Symptom
• All Technical Service Bulletins
  • A/T - Rebuilt Replacement Information
  • A/T - ZF4HP22 Clutch A (Foward) Failure
  • A/T - How To Use A Pressure Gauge
  • A/T - Engine Vacuum Testing
  • A/T - ZF Orifice Placement
  • A/T - ZF 4HP 22 Valve Body Identification
  • A/T - Intermittent Electrical Problems
  • A/T - ZF 4 HP-22 Slipping/No Reverse/3-4 Shuttle Shift
  • A/T - Failsafe Modes
  • A/T - Drive Axle and Wheel Lug Nut Torque Specifications
  • A/T - ZF4HP-22 No Upshift
  • 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 - Slipping or No-Shift/Metal Sealing Rings