Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1990LUMINA APV V6-191 3.1LREPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINTECHNICAL SERVICE BULLETINS
1990 Chevrolet Lumina APV V6-191 3.1L
Transmission and Drivetrain: Technical Service Bulletins
1990 Chevrolet Lumina APV V6-191 3.1LSECTION Technical Service Bulletins
- Customer Interest
- A/T - Intermittent Slip, Downshift, or Busy Cycling TCC
- Hub Assembly (Front) - Squeak/Squawk Noise
- PROM - Low Speeds Shudder or Vibration
- MIL ON, Intermittent or No TCC, DTC's 62, 26 Set
- A/T - Slip in Reverse/No Reverse After Installation
- A/T - Intermittent Second Gear Start in D2 When Cold
- A/T - Slips In Low/Reverse or No Reverse
- Locking Differential - Chattering on Turns
- 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 - Intermittent Slip, Downshift, or Busy Cycling TCC
- Hub Assembly (Front) - Squeak/Squawk Noise
- PROM - Low Speeds Shudder or Vibration
- MIL ON, Intermittent or No TCC, DTC's 62, 26 Set
- A/T - Slip in Reverse/No Reverse After Installation
- A/T - Intermittent Second Gear Start in D2 When Cold
- A/T - Slips In Low/Reverse or No Reverse
- Locking Differential - Chattering on Turns
- Engine, A/T - Shift/Driveability Concerns/MIL ON
- A/T - No Movement in Drive or 3rd Gear
- Driveability
- Erratic Shifting
- Hard Shifting
- Inoperative
- Loose
- No shift/Incorrect gear engagement
- Noise
- Slipping
- Sticking/Binding
- 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 - Intermittent Slip, Downshift, or Busy Cycling TCC
- Rear Wheel Hub/Bearing Assembly - Attaching Bolt Torque
- Differential Pinion Shaft Lock Screw - Service
- A/T - Transaxle Oil Filter Differences
- A/T - Cooler Replacement/Flushing
- A/T - Oil Cooler Flushing Frequently Asked Questions
- Hub Assembly (Front) - Squeak/Squawk Noise
- PROM - Low Speeds Shudder or Vibration
- MIL ON, Intermittent or No TCC, DTC's 62, 26 Set
- A/T - Slip in Reverse/No Reverse After Installation
- A/T - New Clutch Plates
- A/T - Fluid Level Checking Procedure
- A/T - Check Procedure and Shift Speed
- A/T - Drive Link Wear Specifications Revised
- A/T - 3T40/4T60 Noise In Park On an Incline
- A/T - Intermittent Second Gear Start in D2 When Cold
- A/T - Revised Removal & Installation Procedure
- A/T - Slips In Low/Reverse or No Reverse
- 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 - 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 - New Trans Fluid, Dexron IIE
- A/T - DEXRON III Fluid Introduction
- A/T - Evaluating Peened Spacer Plates
- Locking Differential - Chattering on Turns
- A/T - 3T40 New Side Cover and Bottom Pan Gasket
- 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
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.