Transmission and Drivetrain: Technical Service Bulletins

• Customer Interest
  • A/T - Intermittent Slip, Downshift, or Busy Cycling TCC
  • A/T - Oil Pan Leak
  • A/T - Oil Pan Leaks
  • A/T - 3-2 and/or 2-1 Coastdown Clunk
  • A/T - Low Oil Pressure or Oil Pump Cavitation Noise
  • A/T - New Pump to Case Bolt and O-Ring Improves Sealing
  • A/T - No Drive and Reverse
  • A/T Pump Case - Oil Exhausting From Vent
  • A/T Oil Pump Seal Assembly - Leaking
  • A/T - Replacement of the Pump Body Oil Seal Assembly
  • A/T - Whine Noise In First, Second and Reverse
  • A/T - Vent Pipe Oil Leak
  • A/T - Oil Exhausting Out the Breather
  • A/T - Burned Clutches/Cracked Turbine Shaft
  • Engine - Stops Running When Shifted to Reverse/Drive
  • M/T - Seedometer Gear Sleeve Oil Leak
  • A/T - Problems T.V. Cable Adjustments Will Not Correct
  • TCC - Engages at Incorrect Speed
  • A/T - Diagnosis for Burned 2-4 Band or 3-4 Clutch
    • Overview
    • I.Diagnosis Procedure For A Slipping 1-2 or No 1-2 Shift
    • II. For A Condition of Slipping 2-3 or No 2-3 Shift or A Combination of That and the Condition Diagnosed In Section I.
  • A/T - Slipping/Loss of Drive Range
  • A/T - Shudder in Reverse Condition
  • A/T - Buzzing Noise at Idle
  • A/T - Coastdown Clunk
  • A/T - Erratic Shifts
  • A/T - Excess Shift Effort
  • A/T - Harsh Manual 2-1 Downshift/Delayed Downshifts
  • A/T - No 2ND, 4TH or Reverse Gear Operation
  • A/T - Slipping in Reverse or No Reverse
  • M/T - 3rd or 4th Gear Clash
  • M/T - Neutral/Drive Gear Rattle
  • M/T - Clutch Linkage High Pedal Effort
  • Engine - Clicking/Knocking Noise
  • M/T Clutch Cordon Shaft Bracket Bolt - Loose or Broken
  • M/T - Reverse Clutch Chatter
  • Speedometer - Oversize Driven Gear Sleeve
  • A/T - 4L60 Binding/Inoperative In Reverse
  • A/T - Harsh 1st to 2nd Gear Upshift
  • A/T - Partial Tie Up In reverse
  • A/T - 2ND or 3RD Gear Starts
  • A/T - 4L60/700-R4 Transmissions Stuck In First
  • A/T - THM 700-R4 Erratic or No Upshifts
  • A/T - No Fourth Gear and/or Burned 2-4 Band Assembly
  • M/T - Gear Clash
  • A/T - Grinding Noise In All Ranges/No Drive Condition
  • Engine, A/T - Shift/Driveability Concerns/MIL ON
  • A/T - No Movement in Drive or 3rd Gear
• By Symptom
  • Abnormal wear/deterioration
    • A/T - Burned Clutches/Cracked Turbine Shaft
    • A/T - Burned 3-4 Clutch Diagnosis
    • A/T - Burned 3-4 Clutch and/or High 2-3 Shifts
    • A/T - 2004R/200C, 325 Soft 1-2 Shift
    • A/T - Front Bushing Wear
    • Engine - Clicking/Knocking Noise
  • Chattering
    • A/T - Shudder in Reverse Condition
    • M/T - Reverse Clutch Chatter
  • Customer Interest
    • A/T - Intermittent Slip, Downshift, or Busy Cycling TCC
    • A/T - Oil Pan Leak
    • A/T - Oil Pan Leaks
    • A/T - 3-2 and/or 2-1 Coastdown Clunk
    • A/T - Low Oil Pressure or Oil Pump Cavitation Noise
    • A/T - New Pump to Case Bolt and O-Ring Improves Sealing
    • A/T - No Drive and Reverse
    • A/T Pump Case - Oil Exhausting From Vent
    • A/T Oil Pump Seal Assembly - Leaking
    • A/T - Replacement of the Pump Body Oil Seal Assembly
    • A/T - Whine Noise In First, Second and Reverse
    • A/T - Vent Pipe Oil Leak
    • A/T - Oil Exhausting Out the Breather
    • A/T - Burned Clutches/Cracked Turbine Shaft
    • Engine - Stops Running When Shifted to Reverse/Drive
    • M/T - Seedometer Gear Sleeve Oil Leak
    • A/T - Problems T.V. Cable Adjustments Will Not Correct
    • TCC - Engages at Incorrect Speed
    • A/T - Diagnosis for Burned 2-4 Band or 3-4 Clutch
      • Overview
      • I.Diagnosis Procedure For A Slipping 1-2 or No 1-2 Shift
      • II. For A Condition of Slipping 2-3 or No 2-3 Shift or A Combination of That and the Condition Diagnosed In Section I.
    • A/T - Slipping/Loss of Drive Range
    • A/T - Shudder in Reverse Condition
    • A/T - Buzzing Noise at Idle
    • A/T - Coastdown Clunk
    • A/T - Erratic Shifts
    • A/T - Excess Shift Effort
    • A/T - Harsh Manual 2-1 Downshift/Delayed Downshifts
    • A/T - No 2ND, 4TH or Reverse Gear Operation
    • A/T - Slipping in Reverse or No Reverse
    • M/T - 3rd or 4th Gear Clash
    • M/T - Neutral/Drive Gear Rattle
    • M/T - Clutch Linkage High Pedal Effort
    • Engine - Clicking/Knocking Noise
    • M/T Clutch Cordon Shaft Bracket Bolt - Loose or Broken
    • M/T - Reverse Clutch Chatter
    • Speedometer - Oversize Driven Gear Sleeve
    • A/T - 4L60 Binding/Inoperative In Reverse
    • A/T - Harsh 1st to 2nd Gear Upshift
    • A/T - Partial Tie Up In reverse
    • A/T - 2ND or 3RD Gear Starts
    • A/T - 4L60/700-R4 Transmissions Stuck In First
    • A/T - THM 700-R4 Erratic or No Upshifts
    • A/T - No Fourth Gear and/or Burned 2-4 Band Assembly
    • M/T - Gear Clash
    • A/T - Grinding Noise In All Ranges/No Drive Condition
    • Engine, A/T - Shift/Driveability Concerns/MIL ON
    • A/T - No Movement in Drive or 3rd Gear
  • Difficult gear selection
    • A/T - Excess Shift Effort
  • Driveability
    • Engine - Stops Running When Shifted to Reverse/Drive
    • Engine, A/T - Shift/Driveability Concerns/MIL ON
  • Erratic Shifting
    • A/T - Intermittent Slip, Downshift, or Busy Cycling TCC
    • A/T - Problems T.V. Cable Adjustments Will Not Correct
    • A/T - Erratic Shifts
    • A/T - Converter Clutch Shudder
    • A/T - 125, 200C/200 4R, 700 R4 Hidden Residue Build Up
    • A/T - 2004R/200C, 325 Soft 1-2 Shift
    • A/T - 200/2004R, 325/3254L Harsh or Soft 2-3 Shift
    • A/T - THM 200/200C No Passing Gear Above 35 MPH
    • A/T - THM 700-R4 Erratic or No Upshifts
    • Engine, A/T - Shift/Driveability Concerns/MIL ON
  • Hard Shifting
    • A/T - Harsh and Delayed Upshifts
    • A/T - Harsh Manual 2-1 Downshift/Delayed Downshifts
    • A/T - 125, 200C/200 4R, 700 R4 Hidden Residue Build Up
    • A/T - 200/2004R, 325/3254L Harsh or Soft 2-3 Shift
    • A/T - Harsh 1st to 2nd Gear Upshift
  • Hard shifting/Stiff clutch
    • M/T - 3rd or 4th Gear Clash
    • M/T - Clutch Linkage High Pedal Effort
  • Incorrect gear selection
    • TCC - Engages at Incorrect Speed
    • A/T - No Converter Clutch Apply When Unit Is Hot
    • A/T - 2ND or 3RD Gear Starts
  • Inoperative
    • A/T - No Drive and Reverse
    • A/T - No 2ND, 4TH or Reverse Gear Operation
    • A/T - No Converter Clutch Apply When Unit Is Hot
    • A/T - Grinding Noise In All Ranges/No Drive Condition
    • A/T - No Movement in Drive or 3rd Gear
  • Leaks
    • A/T - Oil Pan Leak
    • A/T - Oil Pan Leaks
    • A/T - New Pump to Case Bolt and O-Ring Improves Sealing
    • A/T Pump Case - Oil Exhausting From Vent
    • A/T Oil Pump Seal Assembly - Leaking
    • A/T - Vent Pipe Oil Leak
    • A/T - Oil Exhausting Out the Breather
    • M/T - Seedometer Gear Sleeve Oil Leak
    • A/T - Proper Diagnosis of Oil Leaks
    • A/T - THM 200C In Reverse Range Engine Stops Running
    • Speedometer - Oversize Driven Gear Sleeve
    • A/T - New 2-4 Servo Cover and Seal
  • Loose
    • M/T - Seedometer Gear Sleeve Oil Leak
    • M/T Clutch Cordon Shaft Bracket Bolt - Loose or Broken
  • No shift/Incorrect gear engagement
    • A/T - No Drive and Reverse
    • Input Carrier to Output Shaft Snap Ring - Service
    • A/T - 200/200C/200R4, 325/3254L, 700-R4 No 2nd Gear
    • A/T - THM Late or No Upshifts
    • A/T - 200/2004R, 325/3254L No Reverse/First Gear Only
    • A/T - Slipping Or No Third Gear After Overhaul
    • A/T - 200/200C No Passing Gear/Check Ball Mislocated
    • A/T - THM 200/200C No Reverse
    • A/T - Slipping or No-Shift/Metal Sealing Rings
    • A/T - No Upshift/Governor Contamination
    • A/T - THM 200/200C No Passing Gear Above 35 MPH
    • A/T - 4L60/700-R4 Transmissions Stuck In First
    • A/T - THM 700-R4 Erratic or No Upshifts
    • A/T - No Fourth Gear and/or Burned 2-4 Band Assembly
  • Noise
    • A/T - 3-2 and/or 2-1 Coastdown Clunk
    • A/T - Low Oil Pressure or Oil Pump Cavitation Noise
    • A/T - Whine Noise In First, Second and Reverse
    • A/T - Buzzing Noise at Idle
    • A/T - Coastdown Clunk
    • A/T - 200C Coastdown Clunk Condition
    • M/T - Neutral/Drive Gear Rattle
    • Engine - Clicking/Knocking Noise
    • M/T - Gear Clash
    • A/T - Grinding Noise In All Ranges/No Drive Condition
  • Poor performance
    • A/T - 2ND or 3RD Gear Starts
  • Slipping
    • A/T - Intermittent Slip, Downshift, or Busy Cycling TCC
    • A/T - Sporadic Engagement of Torque Converter Clutch
    • A/T - Burned 3-4 Clutch Diagnosis
    • A/T - Diagnosis for Burned 2-4 Band or 3-4 Clutch
      • Overview
      • I.Diagnosis Procedure For A Slipping 1-2 or No 1-2 Shift
      • II. For A Condition of Slipping 2-3 or No 2-3 Shift or A Combination of That and the Condition Diagnosed In Section I.
    • A/T - Slipping/Loss of Drive Range
    • A/T - Slipping in Reverse or No Reverse
    • A/T - No Fourth Gear and/or Burned 2-4 Band Assembly
    • A/T - Grinding Noise In All Ranges/No Drive Condition
  • Sticking/Binding
    • A/T - Recurrent Sticking Valves/In Line Filters
    • A/T - 125, 200C/200 4R, 700 R4 Hidden Residue Build Up
    • A/T - Sticking Throttle Valves
    • A/T - 4L60 Binding/Inoperative In Reverse
    • A/T - Partial Tie Up In reverse
  • Vibration
    • A/T - 4L60/700-R4 Transmissions Stuck In First
  • Warping
    • A/T - Updated Side Cover Or Bottom Pan Removal
  • Won't disengage
    • A/T - THM 200C In Reverse Range Engine Stops Running
    • A/T - 4L60 Binding/Inoperative In Reverse
• 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
  • A/T - Intermittent Slip, Downshift, or Busy Cycling TCC
  • Differential Pinion Cross Shaft - R&R When Broken
  • A/T - Oil Pan Leak
  • A/T - Oil Pan Leaks
  • A/T - Updated Side Cover Or Bottom Pan Removal
  • A/T - 3-2 and/or 2-1 Coastdown Clunk
  • A/T - Low Oil Pressure or Oil Pump Cavitation Noise
  • A/T - New Pump to Case Bolt and O-Ring Improves Sealing
  • A/T - Updated Oil Pump Assemblies
  • A/T - No Drive and Reverse
  • A/T Pump Case - Oil Exhausting From Vent
  • A/T Oil Pump Seal Assembly - Leaking
  • A/T - Replacement of the Pump Body Oil Seal Assembly
  • A/T - Whine Noise In First, Second and Reverse
  • A/T - Vent Pipe Oil Leak
  • A/T - Oil Exhausting Out the Breather
  • A/T Pump Body Assembly - Revised
  • A/T - Oil Pump Rotor and Slide Service Procedure
  • A/T - Burned Clutches/Cracked Turbine Shaft
  • Engine - Stops Running When Shifted to Reverse/Drive
  • A/T - THM 200 Pumps And Valve Bodies Interchangeability
  • M/T - Seedometer Gear Sleeve Oil Leak
  • A/T - Revised Link Detent Lever to Manual Valve
  • A/T - Revised Rod End Clip
  • A/T - Throttle Valve Cable Adjustment
  • A/T - Harsh and Delayed Upshifts
  • A/T - TV Cable Identification (700-R4 Light Duty)
  • A/T - T.V. Exhaust Valve Never Put in Production
  • A/T - Problems T.V. Cable Adjustments Will Not Correct
  • A/T - Overheating Diagnosis
  • A/T - Sporadic Engagement of Torque Converter Clutch
  • TCC - Engages at Incorrect Speed
  • Maintenance - Updated Minimum Acceptable Oil Levels
  • A/T - Burned 3-4 Clutch Diagnosis
  • A/T - Burned 3-4 Clutch and/or High 2-3 Shifts
  • A/T - Diagnosis for Burned 2-4 Band or 3-4 Clutch
    • Overview
    • I.Diagnosis Procedure For A Slipping 1-2 or No 1-2 Shift
    • II. For A Condition of Slipping 2-3 or No 2-3 Shift or A Combination of That and the Condition Diagnosed In Section I.
  • A/T - New Case Assembly, Removal of Pressure Taps
  • Oil Pressure Plugs - Revised
  • A/T - Revised Reaction Sun Gear Shell Snap Ring
  • A/T - Clutch Bulletin Index
  • A/T - Slipping/Loss of Drive Range
  • A/T - Forward Clutch Plate Assembly Modifications
  • A/T Forward Sprag Clutch - Revised
  • A/T - Service Replacement Model Update
  • A/T - Shudder in Reverse Condition
  • A/T - Understanding Identification Information
  • A/T - Identification Information
  • A/T - Buzzing Noise at Idle
  • A/T - Coastdown Clunk
  • A/T - Proper Diagnosis of Oil Leaks
  • Tools - End Play Checking
  • A/T - Erratic Shifts
  • A/T - Excess Shift Effort
  • A/T - Harsh Manual 2-1 Downshift/Delayed Downshifts
  • Input Carrier to Output Shaft Snap Ring - Service
  • A/T Input Clutch Housing Turbine Shaft - Revised
  • A/T Selective Washer - Revised Implementation Date
  • A/T - No 2ND, 4TH or Reverse Gear Operation
  • TCC Solenoid - Pinched Wires
  • A/T - Checking for Possible Lack of Lubrication
  • A/T - Slipping in Reverse or No Reverse
  • A/T - Core Return Product Feedback Form
  • A/T - Input Housing/Shaft Assembly Service Information
  • A/T - Control Valve Without Throttle Valve Sleeve Update
  • A/T - 200C/2004R Updated Servo Cover Retaining Ring
  • A/T - THM 200 & 2004R New Transmission Oil Pan Gasket
  • A/T - Converter Clutch Solenoid Fluid Source I.D.
  • A/T - Cracked Flex Plate
  • A/T - Torque Converter Identification
    • Overview
    • 298 mm Identification
    • 245 mm Identification
  • A/T - 200, 325, 2004R, 3254L GM Servos
  • 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 - How To Use A Pressure Gauge
  • A/T - 200/200C/200R4, 325/3254L, 700-R4 No 2nd Gear
  • A/T - THM Late or No Upshifts
  • A/T - No Converter Clutch Apply When Unit Is Hot
  • A/T - 200/2004R, 325/3254L No Reverse/First Gear Only
  • A/T - 200C Coastdown Clunk Condition
  • A/T - Recurrent Sticking Valves/In Line Filters
  • A/T - THM 200C Servicing Converter Clutch Apply Screen
  • A/T - THM 200C In Reverse Range Engine Stops Running
  • A/T - 200C/2004R, 700-R4 Lip Seal Packages Part Numbers
  • A/T - Rapid Converter Pump Bushing Wear
  • A/T - Converter Clutch Shudder
  • A/T - 125, 200C/200 4R, 700 R4 Hidden Residue Build Up
  • A/T - Sticking Throttle Valves
  • A/T - 2004R/200C, 325 Soft 1-2 Shift
  • A/T - Slipping Or No Third Gear After Overhaul
  • A/T - 200/2004R, 325/3254L Harsh or Soft 2-3 Shift
  • A/T - Governor Pressure Switches
  • A/T - 200/200C No Passing Gear/Check Ball Mislocated
  • A/T - Methods to Check for Restricted Exhaust
  • A/T - THM 200/200C No Reverse
  • A/T - Slipping or No-Shift/Metal Sealing Rings
  • A/T - Front Bushing Wear
  • A/T - No Upshift/Governor Contamination
  • A/T - THM Steel Clutch Piston Inspection
  • A/T - Sprag Rotation
  • A/T - THM 200C Ball Capsule Versus Cup Plug in TC
  • A/T - Checking Pressure Switches For Leaks
  • A/T - THM 200/200C No Passing Gear Above 35 MPH
  • 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
  • M/T - 3rd or 4th Gear Clash
  • M/T - Neutral/Drive Gear Rattle
  • M/T - Clutch Linkage High Pedal Effort
  • Engine - Clicking/Knocking Noise
  • A/T - DEXRON III Fluid Introduction
  • M/T Clutch Cordon Shaft Bracket Bolt - Loose or Broken
  • M/T - Reverse Clutch Chatter
  • Speedometer - Oversize Driven Gear Sleeve
  • A/T Rear Case Bushing - Removal & Installation Procedure
  • Oil Pressure Switch - Information
    • Overview
    • General Switch Information
    • Specific Switch Function
  • A/T - 4L60 Binding/Inoperative In Reverse
  • A/T - Harsh 1st to 2nd Gear Upshift
  • A/T - New Control Valve Assembly Elimination of TCC Bore
  • A/T - Partial Tie Up In reverse
  • A/T - New Control Valve Assembly Identification
  • A/T - 2ND or 3RD Gear Starts
  • A/T - Evaluating Peened Spacer Plates
  • A/T - 4L60/700-R4 Transmissions Stuck In First
  • A/T - THM 700-R4 Erratic or No Upshifts
  • Drivetrain - Recommended Axle Lubricant
  • A/T - No Fourth Gear and/or Burned 2-4 Band Assembly
  • A/T - New 2-4 Servo Cover and Seal
  • A/T - Low and Reverse Piston Installation/Removal
  • A/T - Accumulator Spring Usage Chart
  • A/T - Accumulator Pistons & Seals Enhance Shift Points
  • A/T - 1-2 Accumulator Piston/Outer Spring Replacement
  • Drivetrain - Revised Differential Case Assembly
  • A/T - THM 700-R4 New Input Housing and Shaft Assembly
  • M/T - Gear Clash
  • A/T - Transmission End Play
  • A/T- THM 700-R4 New Output Shafts and Seal
  • A/T - Grinding Noise In All Ranges/No Drive Condition
  • A/T Case Extension Oil Seal Assembly - Installation
  • M/T - Hydraulic Clutch Bleeding Procedure Improvement
  • Engine, A/T - Shift/Driveability Concerns/MIL ON
  • A/T - 4L60, Revised Sprag/Forward Clutch Hub
  • A/T - No Movement in Drive or 3rd Gear
  • A/T - Water Or Coolant Contamination Information
  • A/T - DEXRON(R)-VI Fluid Information