Transmission and Drivetrain: Technical Service Bulletins
- Customer Interest
- A/T - Loss of Drive or Erratic Shifts
- M/T - Neutral Gear Rattle
- A/T - Harsh 3-2 Downshifts, Diagnosis & Repair
- Overview
- Very Harsh Part Throttle 3-2 Shift At 20-40 MPH:
- Harsh 3-2 and/or 4-2 Shifts:
- 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 3.8L or 4.5L At 15-22 MPH:
- Harsh Upshifts - High Altitude Only:
- A/T - Late Up-Shift Condition
- Speedometer and A/T - Erratic Operation W/Code 24 Set
- A/T - Delayed or No Engagement In Drive/Reverse
- A/T - Drive Link Noise in PARK/NEUTRAL Diagnosis
- A/T - Intermittent or No TCC Apply, Possible DTC 26/39
- A/T - Leak Near 1-2 Servo Casting Slot
- A/T - Intermittent 2ND Gear Start in D2 When Cold
- A/T - Second Gear Vibration
- M/T - Decreased Performance in Clutch System
- A/T - 3-2 Tip-In Flare/Slip-Bump Condition
- Engine - Surge/Erratic Cruise Control Speed
- A/T - 4T60 No Reverse/Slipping or Band Distress
- A/T - Fluid Leak at Helix Converter Seal
- Engine, A/T - Shift/Driveability Concerns/MIL ON
- A/T - No Movement in Drive or 3rd Gear
- By Symptom
- Abnormal wear/deterioration
- Customer Interest
- A/T - Loss of Drive or Erratic Shifts
- M/T - Neutral Gear Rattle
- A/T - Harsh 3-2 Downshifts, Diagnosis & Repair
- Overview
- Very Harsh Part Throttle 3-2 Shift At 20-40 MPH:
- Harsh 3-2 and/or 4-2 Shifts:
- 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 3.8L or 4.5L At 15-22 MPH:
- Harsh Upshifts - High Altitude Only:
- A/T - Late Up-Shift Condition
- Speedometer and A/T - Erratic Operation W/Code 24 Set
- A/T - Delayed or No Engagement In Drive/Reverse
- A/T - Drive Link Noise in PARK/NEUTRAL Diagnosis
- A/T - Intermittent or No TCC Apply, Possible DTC 26/39
- A/T - Leak Near 1-2 Servo Casting Slot
- A/T - Intermittent 2ND Gear Start in D2 When Cold
- A/T - Second Gear Vibration
- M/T - Decreased Performance in Clutch System
- A/T - 3-2 Tip-In Flare/Slip-Bump Condition
- Engine - Surge/Erratic Cruise Control Speed
- A/T - 4T60 No Reverse/Slipping or Band Distress
- A/T - Fluid Leak at Helix Converter Seal
- Engine, A/T - Shift/Driveability Concerns/MIL ON
- A/T - No Movement in Drive or 3rd Gear
- Driveability
- Erratic Operation
- Erratic Shifting
- A/T - Loss of Drive or Erratic Shifts
- A/T - Late Up-Shift Condition
- Speedometer and A/T - Erratic Operation W/Code 24 Set
- A/T - Early Upshift/No Kickdown
- A/T - 440T4 Harsh 3-2 Detent Downshift
- A/T - Converter Clutch Shudder
- A/T - Fluid Leak At Side Cover to Channel Plate Gasket
- Engine, A/T - Shift/Driveability Concerns/MIL ON
- Hard Shifting
- A/T - Harsh 3-2 Downshifts, Diagnosis & Repair
- Overview
- Very Harsh Part Throttle 3-2 Shift At 20-40 MPH:
- Harsh 3-2 and/or 4-2 Shifts:
- 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 3.8L or 4.5L At 15-22 MPH:
- Harsh Upshifts - High Altitude Only:
- A/T - Harsh 3-2 Downshifts, Diagnosis & Repair
- Incorrect gear selection
- Inoperative
- Leaks
- No shift/Incorrect gear engagement
- A/T - Delayed Engagement In Drive/Reverse
- A/T - Intermittent or No TCC Apply, Possible DTC 26/39
- 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 - 4T60 No Reverse/Slipping or 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
- A/T - Loss of Drive or Erratic Shifts
- M/T - Neutral Gear Rattle
- A/T - New Bottom Pan and Controlled Compression Gasket
- A/T - Transaxle Oil Filter Differences
- A/T - Harsh 3-2 Downshifts, Diagnosis & Repair
- Overview
- Very Harsh Part Throttle 3-2 Shift At 20-40 MPH:
- Harsh 3-2 and/or 4-2 Shifts:
- 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 3.8L or 4.5L At 15-22 MPH:
- Harsh Upshifts - High Altitude Only:
- A/T - Oil Cooler Flushing Frequently Asked Questions
- A/T - Late Up-Shift Condition
- Speedometer and A/T - Erratic Operation W/Code 24 Set
- A/T - 3-4 Clutch/2-4 Band Service Information
- A/T - Delayed Engagement In Drive/Reverse
- A/T - Delayed or No Engagement In Drive/Reverse
- A/T - Forward and Reverse Servo Part Changes
- A/T - Revised 4TH Clutch Reaction Plates
- A/T - New Input and 3RD Clutch Inner Piston Seal
- A/T - New Roller Clutch
- A/T - 4th Clutch & Hydraulic Updates
- A/T - Revised Diagnosis Information
- A/T - Drive Link Noise in PARK/NEUTRAL Diagnosis
- A/T - Intermittent or No TCC Apply, Possible DTC 26/39
- A/T - Leak Near 1-2 Servo Casting Slot
- A/T - Intermittent 2ND Gear Start in D2 When Cold
- A/T - Second Gear Vibration
- A/T - Service Replacement Model Update
- A/T - Revised Scavenger Oil Scoop
- A/T - 4T60E Cold Start Rattle Noise
- A/T - New Solenoid Testing Kit
- A/T - Core Return Product Feedback Form
- A/T - 4T60 Solenoid Resistance Tests
- A/T - 4T60 3-2 Tip-In Flare/Slip-Bump at 18-24 MPH
- A/T - 4T60 Intermittent Delayed Engagement
- 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 - Math Formulas Part I
- A/T - Twenty Steps To Successful Repairs
- A/T - Math Part II
- A/T - Choosing the Right ATF
- M/T - Assembly Procedure Revised
- A/T - DEXRON III Fluid Introduction
- M/T - Decreased Performance in Clutch System
- A/T - 3-2 Tip-In Flare/Slip-Bump Condition
- Engine - Surge/Erratic Cruise Control Speed
- A/T - New 1-2 and Reverse Bands
- A/T - 4T60-E No Reverse Gear After Overhaul
- A/T - 4T60-E No Reverse After Overhaul
- A/T - 4T60 No Reverse/Slipping or Band Distress
- A/T - 3T40 New Side Cover and Bottom Pan Gasket
- Drivetrain - Revised Intermediate Drive Shaft R&R
- A/T - Revised End Play Specification
- A/T - Fluid Leak At Side Cover to Channel Plate Gasket
- A/T - Fluid Leak at Helix Converter Seal
- 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