8L90 ATSG Rebuild Manual
The GM 8L90 transmission is a complex 8-speed automatic used in a wide range of performance cars and trucks. Whether you’re a professional mechanic or a DIY rebuilder, having access to a complete service manual is essential. This official ATSG technical repair manual provides step-by-step instructions for inspection, disassembly, rebuilding, troubleshooting, and repair of the 8L90 transmission. FREE UPS Ground to the contiguous United States (lower 48) if purchased with a Kit. FREE USPS Priority Mail if purchased separately.
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Why You Need an 8L90 Transmission Manual
- Comprehensive Guidance: Covers everything from inspection to final reassembly.
- Professional & DIY Friendly: Written for both seasoned transmission specialists and home mechanics.
- Troubleshooting Support: Includes diagnostic charts, common trouble codes, and proven fixes.
- Illustrated Diagrams: Exploded views, charts, and checklists make the rebuild process easier to follow.
- OEM Specifications: Provides torque values, clutch clearances, solenoid data, and more to ensure accuracy.
What’s Covered in the 8L90 Transmission Manual
This technical manual includes detailed procedures, diagrams, and specifications, such as:
- Transmission trouble codes and related repair solutions
- Checkball and bushing locations
- Clutch clearance specifications
- Exploded views and component diagrams
- Electrical volt and OHMS testing data
- Endplay check procedures and recommendations
- Solenoid locations, testing values, and specifications
- Thrust washer and Torrington bearing locations
- Torque specifications for all fasteners
- Valve body assembly, including spring and valve placement details
Benefits of Using the 8L90 Transmission Service Manual
- Saves Time: Avoid guesswork with factory-level repair details.
- Reduces Costly Mistakes: Ensures proper torque and clearance specifications.
- Boosts Confidence: Provides reliable guidance for complex rebuilds.
- Longer Transmission Life: Correct assembly and troubleshooting extend service life.
- Ideal for All Users: Whether you’re diagnosing a problem or performing a full rebuild, this manual is your go-to resource.
Frequently Asked Questions About the 8L90 Transmission Manual
Is the 8L90 transmission manual useful for beginners?
Yes. While the 8L90 is a complex transmission, the manual includes clear diagrams and step-by-step instructions that make it valuable for both beginners and experienced mechanics.
Does the manual cover 8L90 transmission electrical diagnostics?
Absolutely. It includes electrical volt and OHMS testing information, solenoid specifications, and diagnostic procedures for resolving electrical issues.
Can I use this manual to rebuild my 8L90 transmission at home?
Yes. The manual provides complete disassembly and reassembly guidance, torque specs, and clearance values. However, professional tools are still recommended for precision work.
What vehicle models use the 8L90 transmission covered in this manual?
The GM 8L90 transmission is found in a wide range of late-model GM performance cars and trucks, including Corvette, Camaro, Silverado, Sierra, and SUV platforms.
Does the manual include torque converter and valve body information?
Yes. It covers torque specifications, endplay checks, and detailed valve body assembly diagrams, including spring and valve locations.
