Transmission and Drivetrain: Technical Service Bulletins
- Customer Interest
- A/T - 4T60 Oil Pan Bolt Leaks
- A/T - 4T60 Slips/No 3rd Gear/No Drive/Reverse
- A/T - Intermittent Delayed Upshifts
- A/T - Delayed Neutral to Reverse Engagement
- A/T - Delayed Drive Engagement Concern
- A/T - Lo-Rev Clutch Rattle/Clicking, New Smooth Plates
- A/T - 1-2 Slip or Shudder, 2nd Gear Slip, or No 2nd Gear
- A/T - Intermittent Loss of Drive
- A/T - No 3RD Gear (New Thrust Bearing)
- A/T - Harsh Shift Conditions
- Overview
- Very Harsh Part Throttle 3-2 Shift At 20-40 MPH
- Harsh 3-2 and/or 4-2 Shifts - 1985-90 440T4
- Intermittent Harsh Part Throttle 3-2 Shift
- Harsh 3-2 Shift - High Altitude Only
- Harsh 3-2 Shift - At Low Altitude
- Harsh 3-2 Shift Maneuver At 17-20 MPH
- Harsh 3-2 Coastdown Bump 3.8L At 15-22 MPH
- Harsh Upshifts - High Altitude Only
- A/T - 4T60/4T60E Drive Link Noise In Park/Neutral/Drive
- A/T - 4T60 Tip-In Flare/Slip-Bump At 18-24 MPH
- A/T - Fluid Leak Near Governor Area Caused By Porosity
- A/T - Harsh Shift, Double Bump, or Shudder
- A/T - Slipping/No Reverse/Repeat Reverse Band Distress
- A/T - Revised End Play Specifications
- A/T - Intermittent Slip In Forward/Reverse When Cold
- Engine, A/T - Shift/Driveability Concerns/MIL ON
- A/T - No Movement in Drive or 3rd Gear
- By Symptom
- Abnormal wear/deterioration
- Chattering
- Customer Interest
- A/T - 4T60 Oil Pan Bolt Leaks
- A/T - 4T60 Slips/No 3rd Gear/No Drive/Reverse
- A/T - Intermittent Delayed Upshifts
- A/T - Delayed Neutral to Reverse Engagement
- A/T - Delayed Drive Engagement Concern
- A/T - Lo-Rev Clutch Rattle/Clicking, New Smooth Plates
- A/T - 1-2 Slip or Shudder, 2nd Gear Slip, or No 2nd Gear
- A/T - Intermittent Loss of Drive
- A/T - No 3RD Gear (New Thrust Bearing)
- A/T - Harsh Shift Conditions
- Overview
- Very Harsh Part Throttle 3-2 Shift At 20-40 MPH
- Harsh 3-2 and/or 4-2 Shifts - 1985-90 440T4
- Intermittent Harsh Part Throttle 3-2 Shift
- Harsh 3-2 Shift - High Altitude Only
- Harsh 3-2 Shift - At Low Altitude
- Harsh 3-2 Shift Maneuver At 17-20 MPH
- Harsh 3-2 Coastdown Bump 3.8L At 15-22 MPH
- Harsh Upshifts - High Altitude Only
- A/T - 4T60/4T60E Drive Link Noise In Park/Neutral/Drive
- A/T - 4T60 Tip-In Flare/Slip-Bump At 18-24 MPH
- A/T - Fluid Leak Near Governor Area Caused By Porosity
- A/T - Harsh Shift, Double Bump, or Shudder
- A/T - Slipping/No Reverse/Repeat Reverse Band Distress
- A/T - Revised End Play Specifications
- A/T - Intermittent Slip In Forward/Reverse When Cold
- Engine, A/T - Shift/Driveability Concerns/MIL ON
- A/T - No Movement in Drive or 3rd Gear
- Driveability
- Erratic Shifting
- Hard Shifting
- A/T - Harsh 3-2 Downshifts
- Overview
- IA. Very Harsh Part Throttle 3-2 Shift At 20-40 MPH
- IB. Harsh 3-2 and/or 4-2 Shifts
- IC. Intermittent Harsh Part Throttle 3-2 Shift
- Harsh 3-2 Shift **High Altitude Only**
- Harsh 3-2 Shift Low Altitude Only
- Harsh 3-2 Shift Maneuver At 17-20 MPH
- Harsh 3-2 Coastdown Bump At 15-22 MPH
- Harsh Upshifts - High Altitude Only
- A/T - Harsh Shift Conditions
- Overview
- Very Harsh Part Throttle 3-2 Shift At 20-40 MPH
- Harsh 3-2 and/or 4-2 Shifts - 1985-90 440T4
- Intermittent Harsh Part Throttle 3-2 Shift
- Harsh 3-2 Shift - High Altitude Only
- Harsh 3-2 Shift - At Low Altitude
- Harsh 3-2 Shift Maneuver At 17-20 MPH
- Harsh 3-2 Coastdown Bump 3.8L At 15-22 MPH
- Harsh Upshifts - High Altitude Only
- A/T - Harsh Shift, Double Bump, or Shudder
- A/T - Harsh 3-2 Downshifts
- Incorrect gear selection
- Inoperative
- Leaks
- No shift/Incorrect gear engagement
- A/T - Delayed Neutral to Reverse Engagement
- A/T - No 3RD Gear (New Thrust Bearing)
- A/T - Early Upshift/No Kickdown
- A/T - THM Late or No Upshifts
- A/T - 440T4/4T60 Late or No Upshift
- A/T - 125C, 440T4 No Upshift
- A/T - Slipping or No-Shift/Metal Sealing Rings
- A/T - Slipping/No Reverse/Repeat Reverse Band Distress
- Noise
- Slipping
- Vibration
- 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
- A/T - 4T60 Oil Pan Bolt Leaks
- A/T - New Bottom Pan & Controlled Compression Gasket
- A/T - Transaxle Oil Filter Differences
- A/T - Harsh 3-2 Downshifts
- Overview
- IA. Very Harsh Part Throttle 3-2 Shift At 20-40 MPH
- IB. Harsh 3-2 and/or 4-2 Shifts
- IC. Intermittent Harsh Part Throttle 3-2 Shift
- Harsh 3-2 Shift **High Altitude Only**
- Harsh 3-2 Shift Low Altitude Only
- Harsh 3-2 Shift Maneuver At 17-20 MPH
- Harsh 3-2 Coastdown Bump At 15-22 MPH
- Harsh Upshifts - High Altitude Only
- A/T - New Oil Pump Rotor Thickness
- A/T - 4T60 Slips/No 3rd Gear/No Drive/Reverse
- A/T - Intermittent Delayed Upshifts
- A/T - 3RD Clutch and Overhaul Kits
- Engine Controls - Revised Chart C-8A & C-8C, TCC
- Vehicle - Fluid Level General Guidlines
- A/T - Delayed Neutral to Reverse Engagement
- A/T - Delayed Drive Engagement Concern
- A/T - Direct & Forward Clutch Fiber Plates
- A/T - Lo-Rev Clutch Rattle/Clicking, New Smooth Plates
- A/T - Revised Bearing and Clutch (Increases Lubrication)
- A/T - THM 440T4/4T60E New Clutch Plates
- A/T - Revised Direct Clutch Housing
- A/T - 4T60/4T60E 3rd Clutch Plate Identifier Markings
- A/T - 1-2 Slip or Shudder, 2nd Gear Slip, or No 2nd Gear
- A/T - Production Changes Detailed
- A/T - Updated Hydra-matic Designation System
- A/T - Drive Link Wear Specification Revised
- A/T - Intermittent Loss of Drive
- A/T - New R&R Final Drive Pinion Gear Washers & Sun Gear
- A/T - New I.D. Codes & New Overhaul Packages
- A/T - No 3RD Gear (New Thrust Bearing)
- A/T - Preliminary Diagnosis & Description of New Unit
- A/T - Harsh Shift Conditions
- Overview
- Very Harsh Part Throttle 3-2 Shift At 20-40 MPH
- Harsh 3-2 and/or 4-2 Shifts - 1985-90 440T4
- Intermittent Harsh Part Throttle 3-2 Shift
- Harsh 3-2 Shift - High Altitude Only
- Harsh 3-2 Shift - At Low Altitude
- Harsh 3-2 Shift Maneuver At 17-20 MPH
- Harsh 3-2 Coastdown Bump 3.8L At 15-22 MPH
- Harsh Upshifts - High Altitude Only
- A/T - Service Replacement Transaxle Assembly SRTA Update
- A/T - Core Return Product Feedback Form
- A/T - 4T60 3-2 Tip-In Flare/Slip-Bump at 18-24 MPH
- A/T - 4T60/440T4 Changes For 1988
- A/T - Late 1988 GM 4T60/440T4 Changes
- A/T - 440T4/F7 New Governor Screen Added To Case
- A/T - 440T4/F7 No Third Gear
- A/T - 440T4 Input Sprag Replacement
- A/T - 440T4 2-3 Bind-Up/Slips
- A/T - 440T4 Wiring Schematics
- A/T - Engine Vacuum Testing
- A/T - Diagnosing Converter Lock-Up Problems
- Overview
- Test # 1 - Checking For 12 Volts at Terminal -A-
- 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-
- Test # 7 - Grounding the -D- Wire
- 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 - 440T4 No Line Pressure Rise
- A/T - Early Upshift/No Kickdown
- A/T - 440T4/4T60 Spacer Plate Matching
- A/T - How To Use A Pressure Gauge
- A/T - 440T4 Harsh 3-2 Detent Downshift
- A/T - AXOD/E 44T4's and 125's Chain Stretch
- A/T - 440T4 No Second Clutch Switch
- A/T - 440T4 Channel Plate Gasket Blow-Out
- A/T - 440T4 No Upshift/Wrong Gear
- A/T - THM Late or No Upshifts
- A/T - 440T4 Coast-Down Clunk
- A/T - Drive Axle and Wheel Lug Nut Torque Specifications
- A/T - 440T4/4T60 Late or No Upshift
- A/T - No Converter Clutch Apply When Unit Is Hot
- A/T - Converter Clutch Shudder
- A/T - 125C, 440T4 No Upshift
- A/T - Slipping or No-Shift/Metal Sealing Rings
- A/T - Front Bushing Wear
- A/T - 440T4 Plastic Oil Lube Dam
- A/T - 440T4 Converter Regulator Spring Update
- A/T - 440T4 Lock Up And Cruise Control Problems
- A/T - Math Formulas Part I
- A/T - Twenty Steps To Successful Repairs
- A/T - Math Part II
- A/T - 440T4 Soft/Slipping 1-2 Upshift Flare
- A/T - 440T4 Reverse Reaction Plate/Valve Body Strap
- A/T - 440T4 Converter Clutch Shudder
- A/T - Choosing the Right ATF
- A/T - 440T4/4T60 Model Code Information
- A/T - New Transmission/Transaxle Fluid
- A/T - Servicing Vehicles With Contaminated ATF
- A/T - DEXRON III Fluid Introduction
- A/T - Updated ATF Color & Level Checking
- A/T - 4T60/4T60E Drive Link Noise In Park/Neutral/Drive
- A/T - New Spacer Plate Identification Tab
- A/T - 4T60 Tip-In Flare/Slip-Bump At 18-24 MPH
- A/T - Evaluating Peened Spacer Plates
- A/T - Fluid Leak Near Governor Area Caused By Porosity
- A/T - New Governor Screen Added to Case
- A/T - New 1-2 Band Assembly Does Not Require Stop
- A/T - 4T60 New 1-2 and Reverse Bands
- A/T - New Band Assemblies
- A/T - New Reverse Band Apply Pin Gage
- A/T - Harsh Shift, Double Bump, or Shudder
- A/T - Slipping/No Reverse/Repeat Reverse Band Distress
- A/T - Revised End Play Specifications
- A/T - New Thermo Element/Setting Procedure
- A/T - Intermittent Slip In Forward/Reverse When Cold
- 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