Yukon Gear Master Differential Overhaul Kit | Toyota 8" 4-Cylinder 4WD (1986-95 4Runner / 1986-95 Pickup)

Yukon Gear 4-Cylinder Master Differential Overhaul Kit

For 1986–1995 Toyota 4Runner 4WD and 1986–1995 Toyota Pickup 4WD with Toyota 8" 4-Cylinder Rear Differential

Overview

The Yukon Gear 4-Cylinder Master Differential Overhaul Kit provides the bearings, races, seals, shims, hardware, and setup components needed to rebuild the Toyota 8-inch 4-cylinder rear differential used in the listed 4Runner and Pickup 4WD applications.

The available configurations account for three separate differential setup variables: the installed ring-and-pinion configuration, the carrier-bearing journal size, and the pinion-preload method. Select each option according to the components actually being installed rather than vehicle year alone.

Key Features

• Master overhaul kit for the Toyota 8" 4-cylinder rear differential
• Timken bearings and races
• Includes application-specific seals, shims, ring-gear hardware, pinion hardware, setup compound, and gasket components as applicable
• Configurations for factory-specification 27-spline and aftermarket 29-spline ring-and-pinion setups
• Available for 45mm and 50mm carrier-bearing journal configurations
• Choice of standard crush sleeve or solid pinion spacer upgrade
• Suitable for differential rebuilds, gear-ratio changes, and applicable locker installations

Ring & Pinion Configuration

27-Spline (Factory Specification)

Select this configuration when using the original-style 1986-and-newer Toyota 8-inch 4-cylinder OEM ring-and-pinion setup.

29-Spline (Aftermarket Ring & Pinion)

Select this configuration when installing an applicable aftermarket 29-spline ring-and-pinion set. Verify that the matching pinion hardware and yoke configuration are correct for the gear set being installed.

Carrier Bearing Configuration

45mm Carrier (OEM / 45mm-Journal Locker)

Select the 45mm configuration for the original Toyota 4-cylinder differential carrier or an applicable aftermarket locker using 45mm carrier journals.

50mm Carrier (ARB / Yukon Zip / V6-Style Locker)

Select the 50mm configuration when the installed carrier or locker uses 50mm carrier journals. This configuration supplies the carrier-bearing arrangement required for the larger journal size.

Pinion Spacer Configuration

Standard Crush Sleeve

Uses the conventional crush-sleeve method to establish pinion-bearing preload.

Solid Pinion Spacer Upgrade

Uses a solid spacer and shim-adjusted preload arrangement in place of the conventional crush sleeve.

Vehicle Fitment

Toyota 4Runner

• 1986–1989 Toyota 4Runner – 1st Gen – 4WD – 2.4L 4-Cylinder – Toyota 8" Rear Differential
• 1990–1995 Toyota 4Runner – 2nd Gen – 4WD – 2.4L 4-Cylinder – Toyota 8" Rear Differential

Toyota Pickup

• 1986–1988 Toyota Pickup – 2nd Gen – 4WD – 2.4L 4-Cylinder – Toyota 8" Rear Differential
• 1989–1995 Toyota Pickup – 3rd Gen – 4WD – 2.4L 4-Cylinder – Toyota 8" Rear Differential

Fitment Notes

• For Toyota 8" 4-cylinder rear differentials only.
• Does not fit Toyota 7.5" IFS front differentials.
• Does not fit 22R-TE Turbo or 3VZ-E V6-style rear differential applications.
• Ring-and-pinion configuration and carrier-journal size are separate specifications; select both according to the installed differential components.
• Verify the installed third member before ordering, especially on vehicles with swapped axles, carriers, lockers, or gear sets.
• Proper pinion preload, backlash, and gear contact pattern must be established during installation.
• Professional differential setup is recommended.

Product Specifications

Brand: Yukon Gear & Axle
Type: Master Differential Overhaul Kit
Differential: Toyota 8" 4-Cylinder
Position: Rear
Drivetrain: 4WD
Bearing Brand: Timken
Pinion Spline Options: 27-Spline Factory Specification / 29-Spline Aftermarket
Carrier Journal Options: 45mm / 50mm
Pinion Preload Options: Crush Sleeve / Solid Pinion Spacer
Installation: Professional Differential Setup Recommended

Available Configurations

Pinion Spline Configuration

• 27-Spline (Factory Specification)
• 29-Spline (Aftermarket Ring & Pinion)

Carrier Bearing Configuration

• 45mm Carrier (OEM / 45mm-Journal Locker)
• 50mm Carrier (ARB / Yukon Zip / V6-Style Locker)

Pinion Spacer Configuration

• Standard Crush Sleeve
• Solid Pinion Spacer Upgrade