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Jeep Wrangler YJ 1987-1995: Performance Modifications
Jeepers rejoice! Bring new life to your classic Jeep YJ with this new guide to off-road performance.
More than 685,000 YJs were built from 1986 to 1995. They featured heavier wider leaf springs, track bars, and sway bars for improved handling. A massive range of parts are offered for these vehicles, which include lift kits, wheels up to 37 inches, larger brake rotors, high-performance aluminum remote reservoir shocks, stronger driveshafts and U-joints, and Dana 60 conversions.In Jeep Wrangler YJ 1987-1995: Performance Modifications, veteran author Don Alexander covers the 4.0 engine, transmissions (automatic and manual), transfer cases, axles, differentials, and driveshafts, steering boxes, brake upgrades, shocks, springs and lift kits, chassis strengthening, and interior upgrades.
Whether you want to do some simple upgrades, such as a lift and tire combination, or want to go all out with a rock crawler-style suspension and an engine swap, this book will show you all your options.
About the Author
Acknowledgments
Chapter 1: Jeep Wrangler YJ
Jeep Wrangler YJ History
Suspension and Axles
Trim Levels
YJ Purchasing Considerations
Chapter 2: Tires and Wheels
Stock Replacement Tires
Off-Road Tires
Tire Size, Diameters, and Ground Clearance
Tire Cutting, Slashing, and Ply Ratings
Wheels
Wheel Size
Wheel and Tire Balancing
Tire Rotation
Choosing the Right Tires and Wheels
Wheel Spacers and Adapters
Wheel and Tire Care and Maintenance
Chapter 3: Lifts, Suspension, and Steering
Lifting a Jeep Wrangler YJ
Coil Springs Versus Leaf Springs
Articulation
Suspension Control
Control Arm Mounting Brackets
Spring and Control Arm Joints
Track Bars
Shock Absorbers
Types of Shocks
Hydraulic Bump Stops
Steering System
Steering Knuckles, Unit Bearings, and Ball Joints
Steering Hydraulics
Suspension and Steering Alignment
Chapter 4: Brake Upgrades
Brake System Basics
The Need for More Braking Performance
Brake Rotors
Brake Calipers
Disc Brake Conversion Kits for Rear Drum Brakes
Brake Master Cylinders and Power Brake Boosters
Brake Drums and Shoes
Brake Pads
Brake Flex Lines
Brake Fluid
Chapter 5: Bumpers, Armor, and Protection
Skid Plates
Aftermarket Skid Plate Armor
Skid Plate Protection
Rock Sliders
Body Armor
Half Doors and Tube Trail Doors
Fenders
Front Bumpers
Rear Bumpers
Roll Cage
Chapter 6: Transmissions, Drivelines, Axles, Housings, Driveshafts, and Lockers
Stock Jeep Wrangler YJ Axle Assemblies
Axle Gearing
Stock Wrangler YJ Transmissions
Stock Wrangler YJ Transfer Cases
Slip Yoke Eliminator
Gear Ratios and Crawl Ratios
Axle Swaps
Ring and Pinion Gear Upgrades
Central Axle Disconnect Front Axle
Axle Upgrades
Front Axle Shafts
Rear Axle Shafts
Splines
Axle Housing Reinforcements
Aftermarket Complete Axle Assemblies
Axle Lockers
U-joints, Yokes, and CV Joints
Pinion Angle
Ring and Pinion Break-in Procedure
Chapter 7: Styling and Storage Upgrades
Aftermarket Tops
Sun Shades
Tube Doors
Seat Upgrades
Steering Wheel
Mirrors
Fluid Storage
Metal Storage Boxes
Interior Storage
Roof Racks
Chapter 8: Electrical Upgrades and Lights
Battery Upgrades
Dual Battery Systems
Alternators
Auxiliary Lighting
Chapter 9: Engine Upgrades and Cooling System
Cold Air Intakes
Exhaust Systems
Ignition Upgrades
Heavy-Duty Clutch Kits
Forced Induction
Cooling System
Chapter 10: Popular Engine Swaps
Engine Weights
GM LS
Small-Block Ford
Cummins 2.8 Turbodiesel Crate Engine
Chapter 11: Winches, Vehicle Recovery Gear, and Trail Tools
Winches
Steel Versus Synthetic Winch Line
Winch Controllers
Roller Fairlead Versus Hawse Fairlead
Winch Accessories
Hi-Lift Jack
Straps
D-Ring Shackles
Ground Anchor for Winching
Extraction Boards, Sand Ladders, and Bridging Ladders
Trail Tools and Spare Parts
Tire Repair Kit
Simple Tools and Spare Parts
Chapter 12: All J Products/Jeep 4x4 School Street-Legal YJ Rock Crawler
Source Guide
Jeepers rejoice! Bring new life to your classic Jeep YJ with this new guide to off-road performance.
More than 685,000 YJs were built from 1986 to 1995. They featured heavier wider leaf springs, track bars, and sway bars for improved handling. A massive range of parts are offered for these vehicles, which include lift kits, wheels up to 37 inches, larger brake rotors, high-performance aluminum remote reservoir shocks, stronger driveshafts and U-joints, and Dana 60 conversions.In Jeep Wrangler YJ 1987-1995: Performance Modifications, veteran author Don Alexander covers the 4.0 engine, transmissions (automatic and manual), transfer cases, axles, differentials, and driveshafts, steering boxes, brake upgrades, shocks, springs and lift kits, chassis strengthening, and interior upgrades.
Whether you want to do some simple upgrades, such as a lift and tire combination, or want to go all out with a rock crawler-style suspension and an engine swap, this book will show you all your options.
About the Author
Acknowledgments
Chapter 1: Jeep Wrangler YJ
Jeep Wrangler YJ History
Suspension and Axles
Trim Levels
YJ Purchasing Considerations
Chapter 2: Tires and Wheels
Stock Replacement Tires
Off-Road Tires
Tire Size, Diameters, and Ground Clearance
Tire Cutting, Slashing, and Ply Ratings
Wheels
Wheel Size
Wheel and Tire Balancing
Tire Rotation
Choosing the Right Tires and Wheels
Wheel Spacers and Adapters
Wheel and Tire Care and Maintenance
Chapter 3: Lifts, Suspension, and Steering
Lifting a Jeep Wrangler YJ
Coil Springs Versus Leaf Springs
Articulation
Suspension Control
Control Arm Mounting Brackets
Spring and Control Arm Joints
Track Bars
Shock Absorbers
Types of Shocks
Hydraulic Bump Stops
Steering System
Steering Knuckles, Unit Bearings, and Ball Joints
Steering Hydraulics
Suspension and Steering Alignment
Chapter 4: Brake Upgrades
Brake System Basics
The Need for More Braking Performance
Brake Rotors
Brake Calipers
Disc Brake Conversion Kits for Rear Drum Brakes
Brake Master Cylinders and Power Brake Boosters
Brake Drums and Shoes
Brake Pads
Brake Flex Lines
Brake Fluid
Chapter 5: Bumpers, Armor, and Protection
Skid Plates
Aftermarket Skid Plate Armor
Skid Plate Protection
Rock Sliders
Body Armor
Half Doors and Tube Trail Doors
Fenders
Front Bumpers
Rear Bumpers
Roll Cage
Chapter 6: Transmissions, Drivelines, Axles, Housings, Driveshafts, and Lockers
Stock Jeep Wrangler YJ Axle Assemblies
Axle Gearing
Stock Wrangler YJ Transmissions
Stock Wrangler YJ Transfer Cases
Slip Yoke Eliminator
Gear Ratios and Crawl Ratios
Axle Swaps
Ring and Pinion Gear Upgrades
Central Axle Disconnect Front Axle
Axle Upgrades
Front Axle Shafts
Rear Axle Shafts
Splines
Axle Housing Reinforcements
Aftermarket Complete Axle Assemblies
Axle Lockers
U-joints, Yokes, and CV Joints
Pinion Angle
Ring and Pinion Break-in Procedure
Chapter 7: Styling and Storage Upgrades
Aftermarket Tops
Sun Shades
Tube Doors
Seat Upgrades
Steering Wheel
Mirrors
Fluid Storage
Metal Storage Boxes
Interior Storage
Roof Racks
Chapter 8: Electrical Upgrades and Lights
Battery Upgrades
Dual Battery Systems
Alternators
Auxiliary Lighting
Chapter 9: Engine Upgrades and Cooling System
Cold Air Intakes
Exhaust Systems
Ignition Upgrades
Heavy-Duty Clutch Kits
Forced Induction
Cooling System
Chapter 10: Popular Engine Swaps
Engine Weights
GM LS
Small-Block Ford
Cummins 2.8 Turbodiesel Crate Engine
Chapter 11: Winches, Vehicle Recovery Gear, and Trail Tools
Winches
Steel Versus Synthetic Winch Line
Winch Controllers
Roller Fairlead Versus Hawse Fairlead
Winch Accessories
Hi-Lift Jack
Straps
D-Ring Shackles
Ground Anchor for Winching
Extraction Boards, Sand Ladders, and Bridging Ladders
Trail Tools and Spare Parts
Tire Repair Kit
Simple Tools and Spare Parts
Chapter 12: All J Products/Jeep 4x4 School Street-Legal YJ Rock Crawler
Source Guide
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