Automatic Transmission/Transaxle: Technical Service Bulletins

• Customer Interest
  • A/T - No Movement in Drive or 3rd Gear
  • Engine, A/T - Shift/Driveability Concerns/MIL ON
  • A/T - New Lube Window and Band Apply/Anchor Brackets
  • A/T - Binding or Inoperative In Reverse
  • A/T - Premature Wear of Direct Clutch
  • A/T - 4L60 Stuck In First Gear
• All Technical Service Bulletins
  • Vehicle - Engine And Sub Systems Flushing Info. (CANADA)
  • Vehicle - Engine And Sub-Systems Flushing Recommendations
  • 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
  • A/T - DEXRON(R)-VI Fluid Information
  • A/T - Water Or Coolant Contamination Information
  • A/T - No Movement in Drive or 3rd Gear
  • Engine, A/T - Shift/Driveability Concerns/MIL ON
  • A/T - Choosing the Right ATF
  • A/T - 700R4 Lubrication Update
  • A/T - 700R4/200-4R New Fluid Filter Seal
  • A/T - Math Part II
  • A/T - 4L60/THM 700R4 200R4 Fluid Filter Seal
  • A/T - Twenty Steps To Successful Repairs
  • A/T - 700R4 Wiring Diagrams Thru 1989
  • A/T - Math Formulas Part I
    • Overview
    • Shift Speed and Pressure
    • Speedometer Ratios
  • A/T - 700R4 TCC Lock-Up Delay Valve
  • A/T - Checking Pressure Switches For Leaks
  • A/T - THM 2004R 700R4 TCC Stalls Engine In Drive/Reverse
  • A/T - THM 400 No Reverse
  • A/T - No Upshift/Governor Contamination
  • A/T - THM 400 Too Sensitive 3-2 Downshift
  • A/T - Front Bushing Wear
  • A/T - Slipping or No-Shift/Metal Sealing Rings
  • A/T - 700R4 Low And Reverse Clutch Failure
  • A/T - Methods to Check for Restricted Exhaust
  • A/T - 200 4R & 700 R4 Pump Failure
  • A/T - 125, 200C/200 4R, 700 R4 Hidden Residue Build Up
  • A/T - Converter Clutch Shudder
  • A/T - 2004R & 700R4 Pump Break Up
  • A/T - Rapid Converter Pump Bushing Wear
  • A/T - THM 400 Rear Band Adjustment Too Loose
  • A/T - No Converter Clutch Apply When Unit Is Hot
  • A/T - Delayed Forward Engagement/Burnt 3-4 Clutches
  • A/T - 700R4 No 2nd, No 4th and No TCC
  • A/T - 700R4 Rear Planet Failure/Lack of Lube
  • A/T - 700R4 Missing Reverse Checkball
  • A/T - 4L60/700R4 Rear Planet Failure/Lack Of Lube
  • A/T - 700R4 Forward Sprag Design
  • A/T - 700R4, 2004R No Line Pressure Rise
  • A/T - 700R4 Shifts In Manual Low
  • A/T - THM Late or No Upshifts
  • A/T - 200/200C/200R4, 325/3254L, 700-R4 No 2nd Gear
  • A/T - 700R4 Bind In Reverse After Rebuild
  • A/T - 700R4 Valve Body Interchange
  • A/T - How To Use A Pressure Gauge
  • A/T - Valve Body Assembly 700-R4 Inspection
  • 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 - 700R4 No 4th, Late 4th, Falls Out Of 4th
  • A/T - Bind-Up On The 1-2 or 3-2 Downshift
  • A/T - Engine Vacuum Testing
  • A/T - Harsh Reverse Engagements
  • A/T - Torque Converter Identification
    • Overview
    • 298 mm Identification
    • 245 mm Identification
  • A/T - 3L80/THM 400 Center Support Bolt
  • A/T - 700R4 New Piston Seal Design
  • A/T - 700-R4 & 400 Improved Governor Driven Gear
  • A/T - 700R4 New Control Valve Assembly
  • A/T - 700R4 Accumulator Spring Chart
  • A/T - 700R4 New Auxiliary Accumulator Valve Body
  • A/T - 2004R/700R4 Oil Pump & Slide Service
  • A/T - Core Return Product Feedback Form
  • A/T - New Solenoid Testing Kit
  • A/T - Interchangeability Information/Precaution
  • A/T - Designation System Change
  • A/T - Replacement Model Update
  • A/T Fluid Level Indicator - Revised (Sealed)
  • A/T - New Product Information & Diagnostics
    • Overview
    • Transaxle:1989 THM 125C Celebrity, Corsica, Beretta, Cavalier
    • Transaxle:1989 THM 440-T4 Celebrity
      • Overview
      • New 1-2 Servo Apply Pin Selection Chart
      • New Reverse Servo Apply Pin Selection Chart
      • 10 Plate 3RD Clutch Pack
      • One Piece Channel Plate Gasket
      • Elimination of the 3RD and 4TH Clutch Apply Pressure Switches-
      • New Backing Plate and Snap Ring For 2ND Clutch Pack
      • New Shift Speed and Oil Pressure Charts
    • Transmission:1989 THM 200-4R Caprice
    • Transmission:1989 THM 700-R4 Caprice, Camaro, Corvette, C, K, R, V, S, T, G and M Van
    • Transmission:1989 THM 400/475 Trucks
  • A/T - New Lube Window and Band Apply/Anchor Brackets
  • A/T - 4L60 New Output Shafts and Shaft Seals
  • A/T - Click/Whine In Third/Fourth Gear
  • A/T - Hydra-Matic Model Designation System
  • A/T - TCC Wiring Shorted to Ground, Blown Fuses
  • A/T - Cooler Replacement/Flushing
  • A/T - External Oil Cooler Kits
  • A/T - Binding or Inoperative In Reverse
  • A/T - 4L60 New 3-4 Clutch Plates Available
  • A/T - Premature Wear of Direct Clutch
  • A/T - New Low and Reverse Clutch Waved Plate
  • A/T - New ATF Dexron IIe Information
  • A/T - DEXRON III Fluid Introduction
  • A/T - Intermittent Downshift, Slip or Busy/Cycling TCC
  • A/T - Rear Bushing On-Vehicle Service Procedure
  • A/T - Evaluating Peened Spacer Plates
  • A/T - 700R4 Valve Body Modification
  • A/T - 4L60 Stuck In First Gear
  • A/T - 1-2 Accumulator Piston/Outer Spring Replacement