Transmission and Drivetrain: Technical Service Bulletins
- Customer Interest
- 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 - Intermittent Delayed Upshifts
- A/T - Distressed 4TH Clutch Package and Service
- A/T - Slips in Reverse/No Reverse
- A/T - Drive Link Noise in PARK/NEUTRAL Diagnosis
- A/T - Intermittent 2ND Gear Start in D2 When Cold
- A/T - Intermittent TCC, DTC 62/26 (Gear Switches) Set
- A/T - Harsh Engage, Bump, or Shudder, Shifting to REV
- A/T - 4T60 No Reverse/Slipping or Band Distress
- Engine, A/T - Shift/Driveability Concerns/MIL ON
- A/T - No Movement in Drive or 3rd Gear
- A/T - Harsh 3-2 Downshifts, Diagnosis & Repair
- By Symptom
- Abnormal wear/deterioration
- Chattering
- Customer Interest
- 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 - Intermittent Delayed Upshifts
- A/T - Distressed 4TH Clutch Package and Service
- A/T - Slips in Reverse/No Reverse
- A/T - Drive Link Noise in PARK/NEUTRAL Diagnosis
- A/T - Intermittent 2ND Gear Start in D2 When Cold
- A/T - Intermittent TCC, DTC 62/26 (Gear Switches) Set
- A/T - Harsh Engage, Bump, or Shudder, Shifting to REV
- A/T - 4T60 No Reverse/Slipping or Band Distress
- Engine, A/T - Shift/Driveability Concerns/MIL ON
- A/T - No Movement in Drive or 3rd Gear
- A/T - Harsh 3-2 Downshifts, Diagnosis & Repair
- Driveability
- Erratic Shifting
- 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 Forward Engagement
- A/T - 125, 200C/200 4R, 700 R4 Hidden Residue Build Up
- A/T - Harsh Engage, Bump, or Shudder, Shifting to REV
- A/T - Harsh 3-2 Downshifts, Diagnosis & Repair
- Inoperative
- Leaks
- Loose
- No shift/Incorrect gear engagement
- Noise
- Slipping
- Sticking/Binding
- 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 - 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 - Intermittent Delayed Upshifts
- Engine Controls - Revised Code 26 (QDM Circuit) Charts
- A/T - Distressed 4TH Clutch Package and Service
- A/T - Slips in Reverse/No Reverse
- A/T - Two Plate 4TH Clutch and Destressed 4TH Clutch
- A/T - Revised 4TH Clutch Reaction Plates
- A/T - Revised Forward Clutch Piston Seals
- A/T - New Input and 3RD Clutch Inner Piston Seal
- A/T - Output Shaft/Bearing and Clutch Assembly Revised
- A/T - New 3RD Fluid Reroute of 3-2 Downshift Fluid
- A/T Channel Plate and Input Housing - New Model Codes
- A/T - Drive Link Noise in PARK/NEUTRAL Diagnosis
- A/T - Revised Wiring Harnesses and Pressure Switches
- A/T - Intermittent 2ND Gear Start in D2 When Cold
- A/T - Service Replacement Model Update
- A/T - Revised Wiring Diagram
- A/T - Core Return Product Feedback Form
- A/T - Torque Converter Identification
- A/T - Engine Vacuum Testing
- A/T - THM 125C Model Codes
- 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 - 125C Uncontrolled Lock-Up, Kills Engine At Stop
- A/T - How To Use A Pressure Gauge
- A/T - AXOD/E 44T4's and 125's Chain Stretch
- A/T - 125/440 T4 Sprocket and Final Drive Identification
- A/T - THM Late or No Upshifts
- A/T - Drive Axle and Wheel Lug Nut Torque Specifications
- A/T - Harsh Forward Engagement
- A/T - Rapid Converter Pump Bushing Wear
- A/T - 125, 200C/200 4R, 700 R4 Hidden Residue Build Up
- A/T - Methods to Check for Restricted Exhaust
- A/T - Slipping or No-Shift/Metal Sealing Rings
- A/T - Front Bushing Wear
- A/T - Math Formulas Part I
- A/T - Twenty Steps To Successful Repairs
- A/T - Math Part II
- A/T - Choosing the Right ATF
- A/T - DEXRON III Fluid Introduction
- A/T - Intermittent TCC, DTC 62/26 (Gear Switches) Set
- A/T - New Chain Scavenging Scoop and Sprocket Support
- A/T - New 1-2 and Reverse Bands
- A/T - Harsh Engage, Bump, or Shudder, Shifting to REV
- A/T - Revised Style 1-2 Band Assembly
- Parking Lock System - Revised for Heavier Vehicles
- A/T - 4T60 No Reverse/Slipping or Band Distress
- A/T - 3T40 New Side Cover and Bottom Pan Gasket
- A/T - Revised End Play Specification
- 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