Chevy Differentials: How To Rebuild The 10- And 12-bolt by Jefferson BryantChevy Differentials: How To Rebuild The 10- And 12-bolt by Jefferson Bryant

Chevy Differentials: How To Rebuild The 10- And 12-bolt

byJefferson Bryant

Paperback | May 5, 2015

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Millions of Chevrolet vehicles were built and sold in the 1960s and 1970s, and the great majority of those were rear-wheel-drive models with differentials known as 10-bolts or 12-bolts. High-performance limited-slip versions of these differentials also have been installed in Camaros, Chevelles, Corvettes, and many other GM muscle cars from 1964 through the 1970s, as well as Chevy and GMC trucks. If you have owned a GM performance car from the 1960s or 1970s, you have owned one of these sturdy, reliable, and versatile differentials.

Many of these differentials are now more than 40 years old and are due for an overhaul. InChevy Differentials: How to Rebuild the 10- and 12-Bolt, author Jefferson Bryant walks you through the entire process of disassembling, evaluating, and rebuilding the perfect differential for your GM application. In this step-by-step guide, you learn how to completely disassemble the differential, evaluate components, and select replacement parts. You're also shown all of the up-to-date techniques for re-assembling the differential and axle. Informative sections on axle identification and replacement parts are also provided.

Maybe you have found a salvage-yard unit and want to rebuild it to upgrade your existing vehicle. Maybe you would like to install an aftermarket 12-bolt assembly for extreme performance or racing. This is the only book dedicated solely to rebuilding, setting up, and modifying these axle assemblies for long service life and maximum performance. If you're going to rebuild a Chevy 10- or 12-bolt axle, this book delivers the essential information to get the job done right.

, his own automotive magazine.
Title:Chevy Differentials: How To Rebuild The 10- And 12-boltFormat:PaperbackDimensions:144 pages, 11 × 8.5 × 0.38 inPublished:May 5, 2015Publisher:CartechLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:1613251610

ISBN - 13:9781613251614

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Table of Contents



What Is a Workbench® Book? 


Chapter 1:

History and Identification 

10-Bolt Identification 

12-Bolt Identification 


Chapter 2:

Suspension Types and Differential Housings 

Leaf Spring Rear Suspension 

Watt&s Linkage Rear Suspension 

Coil Spring Rear Suspension 

Triangulated Four-Link Rear Suspension 

Independent Rear Suspension 

Project: Building a Universal Axle 

Front Suspension 

Advanced Suspension Components 

Project: Installing an A-Body Axle with Tubular Arms 

Project: Updating Inside the Housing 

Bearings and Races 


Chapter 3:


Main Housing 

Limited-Slip or Open Differential?

External Inspection 

Axle Removal 

Pinion Yoke Removal 

Axle Shaft Removal 

Carrier Removal 

Pinion Removal 

Cleaning the Housing 

Project: Converting a 12-Bolt for a 1967 Chevy Truck 


Chapter 4:


Open Differentials 

Limited-Slip Differentials 

Project: Installing Plug and Separator Block 

Project: Installing Ladder Bars 

Clutch-Type Differentials 

Project: Rebuilding a Clutch-Type Differential 

Axle Assembly Continues 


Chapter 5:


Determine Gear Ratio 

Gear Selection 

Ring Gears and Carrier 

Ring Gear Bolts 

Bearing Installation 

Ring and Pinion Machining



Chapter 6:


Torque Load 

Spline Design 

Stock versus Aftermarket Axles 

Aftermarket Upgrades 

Project: Replacing Wheel Studs 


Chapter 7:

Setup and Installation 

Project: Installing an Axle Assembly and Differential 

Pinion Depth 

Pinion Gear Patterns 

Project: Pattern Checking

Project: Setting the Base Pinion Depth 

Ring Gear Backlash 

Project: Setting the Ring Gear Backlash 

Project: Setting Up a Dial Indicator 

Preload Adjustments 

Complete the Rebuild 

Gear Break-In Procedure 


Chapter 8:


Choosing a Builder 

Power Output Considerations 

Carrier Bearings 


Mounting Options 

Removal Methods 

Project: Installing a Driveshaft U-Joint 

Snap Rings 

Project: Modifying a Stock Driveshaft 


Chapter 9:

Lockers and Spools 

Auto Lockers 

Mechanical Locking Differentials 

Electronic Locking Differentials 

Drop-in Lockers 



Chapter 10:

Wheels and Tires 

Wheel Fitment 

Project: Creating a Wheel Fitment Jig 

Project: Measuring for Tire Clearance 

Tire Codes

Tire Grading 

Tire Use 

Tire Construction 

Tire Sizing 

Tire Storage 

Tire Selection 


Source Guide