Eaton Differentials & Lockers

Shop Eaton differentials, ELocker selectable lockers, Detroit Locker automatic lockers, Detroit Truetrac limited-slip differentials, and Eaton Posi units at Black Ops Auto Works. Explore traction upgrades alongside installation kits, wiring components, and differential service parts. Compare the different operating designs to find the right match for your axle, driving conditions, and street, trail, or performance build.

Eaton ELocker Selectable Locking Differentials

The Eaton ELocker combines open-differential operation with electronically controlled locking. It allows the driver to select locking operation when additional traction is needed, rather than relying on an automatic locking mechanism. This collection includes ELocker and ELocker4 options for specific axle applications, along with compatible wiring and internal service components.

Select by the exact axle specifications and Eaton part number. Confirm wiring requirements, included controls, and manufacturer operating instructions before installation. ELocker service kits and stator or armature assemblies must match the differential being repaired.

Detroit Locker Automatic Locking Differentials

The Detroit Locker uses an automatic locking and unlocking design to drive both wheels while permitting wheel-speed differences when its mechanism allows. Unlike an ELocker, it does not require the driver to activate an electrical switch for locking operation.

Consider how an automatic locker fits your intended driving environment before choosing one. Its operating behavior differs from an open differential or limited-slip unit. Match the specific model to the axle, vehicle configuration, and intended use rather than treating every traction upgrade as interchangeable.

Detroit Truetrac Helical-Gear Limited-Slip Differentials

The Detroit Truetrac is a gear-driven limited-slip differential, not a selectable or automatic locker. Its helical gears bias torque toward the wheel with greater traction while allowing the wheel-speed differences needed during turns. Unlike clutch-type limited-slip designs, Truetrac does not rely on clutch packs.

This collection includes Truetrac options for multiple front and rear axle families. Compare spline count, axle-shaft diameter, gear-ratio range, and any application-specific bearing requirements. Follow Eaton’s lubricant guidance for the exact unit rather than assuming every limited-slip differential uses the same oil or additive.

Eaton Posi Clutch-Type Limited-Slip Differentials

Eaton Posi differentials use clutch packs to provide automatic limited-slip operation. Their rebuildable design offers a different approach from the helical-gear Truetrac and the locking mechanisms used in ELocker and Detroit Locker products.

Choose a Posi unit by its supported axle and ring-and-pinion ratio range. Review the specified lubricant, friction-modifier requirements, and service instructions before installation. A limited-slip differential should not be confused with a fully locking differential.

Differential Installation Kits and Service Components

Complete the job with axle-specific master installation kits, retaining components, ELocker wiring service kits, and compatible internal repair parts. Kit contents vary, so verify the included bearings, races, seals, shims, and hardware against the work being performed.

Browse our differential installation kits when planning the upgrade. A differential purchase does not automatically include every setup component, lubricant, electrical connection, or replacement fastener required for installation.

How to Choose the Correct Eaton Differential

• Identify the exact axle manufacturer, axle family, and front or rear position.
• Confirm axle-shaft spline count and diameter.
• Check ring-gear size, gear ratio, and applicable carrier break.
• Verify housing generation, factory differential type, and installation notes.
• Match the operating design to your driving needs.
• Review bearing, wiring, lubricant, and installation-kit requirements.
• Confirm compatibility using the exact Eaton manufacturer part number.

Frequently Asked Questions

What is the difference between Eaton ELocker, Detroit Locker, Truetrac, and Posi?

ELocker provides driver-selectable electronic locking. Detroit Locker operates automatically. Truetrac is a helical-gear limited-slip differential, while Posi uses clutch packs for limited-slip operation. They offer different traction characteristics and are not interchangeable simply because they fit similar vehicles.

Can I choose an Eaton differential by vehicle year and model alone?

No. Vehicles can have different axle assemblies, spline counts, gear ratios, and factory differential options. Identify the actual axle and check Eaton’s application notes, especially if the vehicle has been modified or received an axle swap.

Does Detroit Truetrac need friction modifier?

Eaton advises against friction modifiers for Detroit Truetrac because they can reduce torque-biasing performance. Follow the current lubricant instructions for your exact differential. Do not apply clutch-type limited-slip additive requirements to a Truetrac.

Are bearings and installation hardware included?

Only when the individual listing specifies them. Bearings, shims, seals, ring-gear bolts, wiring, and other setup components may be separate. Some applications require bearings that differ from the original equipment.

Should a professional install an Eaton differential?

Professional drivetrain installation is recommended. Correct bearing preload, backlash, and gear-contact checks are essential. Additional setup work depends on whether the job includes a carrier replacement, new gears, or a complete axle rebuild.

Shop Eaton at Black Ops Auto Works

Explore Eaton traction solutions and service components for your next drivetrain upgrade. Compare selectable lockers, automatic lockers, and limited-slip differentials, then match the chosen unit and installation parts to your exact axle. Review product-specific fitment and manufacturer instructions before ordering.