Transmission and Drivetrain: Technical Service Bulletins
- Recalls
- Customer Interest
- A/T - Oil Pan Leak
- A/T Oil Pan - Leaks
- A/T - Harsh 3-2 Downshifts & Other Hard Shift Conditions
- Overview
- I. Very Harsh Part Throttle 3-2 Shift At 20-40 MPH
- II. Harsh 3-2 and/or 4-2 Shifts
- III. Intermittent Harsh Part Throttle 3-2 Shift
- IV. Harsh 3-2 Shift At High Altitude* Only
- V. Harsh 3-2 Shift At Low Altitude* Only
- VI. Harsh 3-2 Shift Maneuver At 17-20 MPH
- VII. Harsh 3-2 Coast Down Bump At 15-22 MPH
- Viii. Harsh Upshifts At High Altitude* Only
- A/T - 4T-60 1-2 Shift Problems
- A/T - 4T60 No Third Gear/No Drive or Reverse Conditions
- A/T - Delayed & Harsh Upshifts
- A/T - Shift Timing Problems
- A/T - No Third Gear Operation
- A/T - No Third Gear
- A/T - Whine/Whistle In PARK/NEUTRAL
- A/T - Intermittent Loss of Drive
- A/T - Harsh Engage, Double Bump or Shudder
- A/T - THM 440-T4 Reverse Gear Problems
- A/T - Fluid Leak Near Governor, New Case
- A/T - Intermittently Slips When Cold
- Drive Axle - Wobble, Vibration Between 20-35 MPH
- Rear Axle Pinion Flange Seal - Leak
- 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 - Oil Pan Leak
- A/T Oil Pan - Leaks
- A/T - Harsh 3-2 Downshifts & Other Hard Shift Conditions
- Overview
- I. Very Harsh Part Throttle 3-2 Shift At 20-40 MPH
- II. Harsh 3-2 and/or 4-2 Shifts
- III. Intermittent Harsh Part Throttle 3-2 Shift
- IV. Harsh 3-2 Shift At High Altitude* Only
- V. Harsh 3-2 Shift At Low Altitude* Only
- VI. Harsh 3-2 Shift Maneuver At 17-20 MPH
- VII. Harsh 3-2 Coast Down Bump At 15-22 MPH
- Viii. Harsh Upshifts At High Altitude* Only
- A/T - 4T-60 1-2 Shift Problems
- A/T - 4T60 No Third Gear/No Drive or Reverse Conditions
- A/T - Delayed & Harsh Upshifts
- A/T - Shift Timing Problems
- A/T - No Third Gear Operation
- A/T - No Third Gear
- A/T - Whine/Whistle In PARK/NEUTRAL
- A/T - Intermittent Loss of Drive
- A/T - Harsh Engage, Double Bump or Shudder
- A/T - THM 440-T4 Reverse Gear Problems
- A/T - Fluid Leak Near Governor, New Case
- A/T - Intermittently Slips When Cold
- Drive Axle - Wobble, Vibration Between 20-35 MPH
- Rear Axle Pinion Flange Seal - Leak
- Engine, A/T - Shift/Driveability Concerns/MIL ON
- A/T - No Movement in Drive or 3rd Gear
- Driveability
- Erratic Shifting
- A/T - 4T60 No Third Gear/No Drive or Reverse Conditions
- A/T - Shift Timing Problems
- A/T - Early Upshift/No Kickdown
- A/T - 440T4 Harsh 3-2 Detent Downshift
- A/T - Converter Clutch Shudder
- A/T - THM 400 Too Sensitive 3-2 Downshift
- A/T - 440T4 Soft/Slipping 1-2 Upshift Flare
- Engine, A/T - Shift/Driveability Concerns/MIL ON
- Hard Shifting
- A/T - Harsh 3-2 Downshifts & Other Hard Shift Conditions
- Overview
- I. Very Harsh Part Throttle 3-2 Shift At 20-40 MPH
- II. Harsh 3-2 and/or 4-2 Shifts
- III. Intermittent Harsh Part Throttle 3-2 Shift
- IV. Harsh 3-2 Shift At High Altitude* Only
- V. Harsh 3-2 Shift At Low Altitude* Only
- VI. Harsh 3-2 Shift Maneuver At 17-20 MPH
- VII. Harsh 3-2 Coast Down Bump At 15-22 MPH
- Viii. Harsh Upshifts At High Altitude* Only
- A/T - Delayed & Harsh Upshifts
- A/T - Shift Timing Problems
- A/T - Harsh Reverse Engagements
- A/T - Harsh Engage, Double Bump or Shudder
- A/T - Harsh 3-2 Downshifts & Other Hard Shift Conditions
- Incorrect gear selection
- Inoperative
- Leaks
- Loose
- No shift/Incorrect gear engagement
- A/T - 4T60 No Third Gear/No Drive or Reverse Conditions
- A/T - No Third Gear Operation
- A/T - No Third Gear
- 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 - No Upshift/Governor Contamination
- A/T - THM 400 No Reverse
- A/T - THM 440-T4 Reverse Gear Problems
- Noise
- Recalls
- 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
- Electrical - Wire Probing Device
- Campaign - Special Policy Check List
- A/T - New R&R Sun Gear Bearing & Pinion Gear Washers
- A/T - New Bottom Pan & Controlled Compression Gasket
- A/T - Oil Pan Leak
- A/T Oil Pan - Leaks
- A/T - Transaxle Oil Filter Differences
- A/T - Harsh 3-2 Downshifts & Other Hard Shift Conditions
- Overview
- I. Very Harsh Part Throttle 3-2 Shift At 20-40 MPH
- II. Harsh 3-2 and/or 4-2 Shifts
- III. Intermittent Harsh Part Throttle 3-2 Shift
- IV. Harsh 3-2 Shift At High Altitude* Only
- V. Harsh 3-2 Shift At Low Altitude* Only
- VI. Harsh 3-2 Shift Maneuver At 17-20 MPH
- VII. Harsh 3-2 Coast Down Bump At 15-22 MPH
- Viii. Harsh Upshifts At High Altitude* Only
- A/T - 4T-60 1-2 Shift Problems
- A/T - 4T60 No Third Gear/No Drive or Reverse Conditions
- A/T - Delayed & Harsh Upshifts
- A/T - Shift Timing Problems
- A/T - No Third Gear Operation
- A/T - No Third Gear
- A/T - Overhaul Packages Availability
- Campaign - A/T 4th Gear Clutch Delamination
- A/T - Revised Drive Link Wear Specifications
- A/T - Whine/Whistle In PARK/NEUTRAL
- A/T - Replacement Transmission Part Numbers
- A/T - Modifications to Overhaul Packages
- A/T - Core Return Product Feedback Form
- A/T - Service Replacement
- 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 - 700-R4 & 400 Improved Governor Driven Gear
- A/T - 3L80/THM 400 Center Support Bolt
- A/T - Torque Converter Identification
- A/T - 440T4 2-3 Bind-Up/Slips
- A/T - 440T4 Wiring Schematics
- A/T - Harsh Reverse Engagements
- A/T - DFI Trouble Shooting
- 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 - THM 400 Rear Band Adjustment Too Loose
- A/T - Rapid Converter Pump Bushing Wear
- A/T - Converter Clutch Shudder
- A/T - 125C, 440T4 No Upshift
- A/T - Methods to Check for Restricted Exhaust
- A/T - Slipping or No-Shift/Metal Sealing Rings
- A/T - Front Bushing Wear
- A/T - THM 400 Too Sensitive 3-2 Downshift
- A/T - No Upshift/Governor Contamination
- A/T - THM 400 No Reverse
- A/T - 440T4 Plastic Oil Lube Dam
- A/T - Checking Pressure Switches For Leaks
- 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 - Dexron IIE Transaxle Fluid
- A/T - Servicing Vehicle With Contaminated Fluid
- A/T - DEXRON III Fluid Introduction
- A/T - Evaluating Peened Spacer Plates
- A/T - Addition of Governor Screen to Transaxle Case
- Drivetrain - Recommended Axle Lubricant
- A/T - Intermittent Loss of Drive
- A/T - 4T60 New 1-2 and Reverse Bands
- A/T - Revised Reverse Band Apply Pin Gauge
- A/T - Harsh Engage, Double Bump or Shudder
- A/T - THM 440-T4 Reverse Gear Problems
- A/T - Growling Noise In Park On an Incline
- A/T - 1-2 Accumulator Piston/Outer Spring Replacement
- A/T - Fluid Leak Near Governor, New Case
- Drivetrain - New Seal Protector for Drive Axle R&R
- A/T - Intermittently Slips When Cold
- Drive Axle - Wobble, Vibration Between 20-35 MPH
- Rear Axle Pinion Flange Seal - Leak
- 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