Eaton K-F8.8EIRS is a master differential installation kit for the exact axle family and position identified in this listing. Verify bearing journals, seals, ring-gear hardware, pinion depth components, and axle revision before teardown.
Fitment
This component is selected by axle family, position, spline count, shaft diameter, ratio range, and exact Eaton part number rather than vehicle year, make, and model. Confirm the installed axle before ordering.
Specifications
| Manufacturer | Eaton |
|---|---|
| Manufacturer Part Number | K-F8.8EIRS |
| Product Type | Differential Install Kits |
| Fitment Type | Axle and specification specific |
| Axle Position | Rear |
| Ring Gear | 8.8in |
What's Included
- One Eaton master differential installation kit in the exact listed configuration
- Manufacturer packaging and documentation supplied with the exact part number
About Eaton
Eaton manufactures locking and limited-slip differentials, axle service parts, installation kits, and ELocker controls for performance, off-road, towing, and commercial applications. Correct selection depends on the exact axle and differential configuration.
Related Eaton Products
- Eaton Ford 10.50in Rear Master Install Kit
- Eaton Ford 7.5in Rear Master Install Kit
- Eaton Ford 9.75in Rear Master Install Kit
Browse the Eaton collection for related drivetrain components.
Frequently Asked Questions
Which axle does Eaton K-F8.8EIRS service?
Match the axle family, front or rear position, model revision, bearing journals, seals, and ring-gear hardware shown in this listing. Similar axle names can use different components.
Does a master install kit include the ring and pinion?
No. A master installation kit supplies service parts used during differential setup. The differential and ring-and-pinion set are separate unless the listing explicitly states otherwise.
Can I install this kit without measuring gear setup?
No. Pinion depth, bearing preload, backlash, and gear-tooth contact pattern must be measured and adjusted by a qualified drivetrain technician.
Installation Instructions
Professional drivetrain installation is recommended. Confirm the axle and component identity before disassembly, inspect all reusable parts, follow current Eaton and vehicle service procedures, establish bearing preload and backlash, verify the gear contact pattern, use the specified lubricant, and test operation before returning the vehicle to service.
Differential Install Kits
Differential Install Kits are stocked at Black Ops Auto Works for performance projects and dependable replacement work. Differential Install Kits provide the bearings, races, seals, shims, crush sleeves and setup hardware needed when rebuilding or re-gearing an axle. Shop master install kits, mini install kits, pinion install kits, carrier bearings, solid spacers and axle-specific hardware for Dana, GM, Ford, Chrysler, Jeep and Toyota applications. Every product is filterable by year, make, model, trim, engine and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 114 differential install kits products across street, truck, track, restoration and custom-build applications. What This Differential Install Kits Collection Covers This collection supports axle work on Dana 30, Dana 44, Dana 60, Ford 8.8, Ford 9-inch, GM 10-bolt, GM 8.6, GM 11.5 and Chrysler rear ends. Product pages should be matched to the exact differential model, spline count, axle ge...
View Differential Install Kits Products
Differentials & Components
Differentials and components at Black Ops Auto Works include diff braces, diff covers, rebuild and overhaul kits, differential bushings and mounts, limited-slip differentials, yokes, and final drive gears built for street, towing, off-road, and racing applications. Black Ops Auto Works carries 1,332 drivetrain SKUs from Yukon Gear and Axle, ARB, OS Giken, SuperPro, and Per4mance Development, spanning Hellcat and Trackhawk platforms, trucks, Jeep Wrangler, and sport compacts. What This Collection Covers This collection combines fifteen related differential and drivetrain categories, including diff braces, diff covers and gaskets, rebuild and overhaul kits, install kits, seal kits, bushings, mounts, housings, dropouts, spider gears, yokes, complete differentials, and final drive gears. Product Types in This Collection Shoppers will find billet differential braces for high-horsepower RWD platforms, nodular iron and aluminum diff covers, master overhaul kits, differential-to-cradle ...
View Differentials & Components Products
Drivetrain
Drivetrain parts for high-horsepower Mopar, truck, Jeep, and import platforms are stocked at Black Ops Auto Works. Shop differentials, axles, driveshafts, clutch kits, flywheels, flexplates, shifters, transmission components, ring and pinion gears, differential braces, and driveline hardware for Hellcat, Trackhawk, TRX, HEMI, LS, LT, Coyote, and turbocharged import platforms. Every drivetrain part is filterable by vehicle platform, drivetrain layout, transmission type, and power level so the correct part ships the first time. Black Ops Auto Works carries 4,765 drivetrain SKUs across differentials, axles, clutches, and transmission hardware. What This Category Covers The drivetrain transfers power from the engine to the wheels and includes the transmission, clutch, driveshafts, axles, differentials, ring and pinion gears, wheel hubs, wheel bearings, U-joints, shifters, mounts, and bushings. Upgrading these components improves power delivery, durability, and reliability under incr...
View Drivetrain Products
Eaton
Shop Eaton differentials, installation kits and service components at Black Ops Auto Works. Compare Detroit Truetrac, Detroit Locker, Posi and ELocker references for supported axle applications. Choose a complete differential or the service pieces for an existing unit using the actual housing, spline count and gear-ratio requirements.Differential Families and Axle ApplicationsThe selection spans Ford, GM, Dana, Toyota and other application-specific references. Detroit Truetrac, Detroit Locker, Posi and ELocker titles describe different product families, with separate intended-use and installation requirements. Compare the exact product’s operating characteristics with the intended street, trail or other supported use before choosing a family.Ratio Ranges, Splines and Installation KitsTitles distinguish front and rear positions, spline counts, axle dimensions and ratio ranges. Match the exact housing and carrier requirements rather than using the vehicle badge alone. Master installat...
View Eaton Products
Ford Crown Victoria Parts and Accessories
Shop Ford Crown Victoria exhaust, suspension, brake and driveline references at Black Ops Auto Works. Compare BRExhaust exhaust applications, QA1 front coilover options, Wilwood front brakes and Yukon or Eaton axle components around the way you use your car. Match year, engine, installed suspension and axle before selecting an upgrade or service package.Exhaust Replacement and Converter ApplicationsBRExhaust titles include Crown Victoria/Grand Marquis exhaust references, including a 2003–2011 4.6L listing. MagnaFlow converter titles distinguish 2003–2005 4.6L driver and passenger sides. Confirm exact production, emissions configuration, legal application and installed connections. An exhaust kit and a catalytic converter are separate scopes of work; review precisely which components each reference supplies.QA1 Front Coilovers and Wilwood Brake ChoicesQA1 titles name 2003–2011 Crown Victoria front coilover systems with single adjustment and different spring rates. Choose the full app...
View Ford Crown Victoria Parts and Accessories Products
Ford Mustang Parts & Accessories
Shop Ford Mustang parts for exhaust projects, body changes, brake service and chassis work at Black Ops Auto Works. Compare CORSA exhaust references, Anderson Composites panels, Baer or DBA brake options and suspension components. Build your order around the exact Mustang generation, engine, body, transmission and installed equipment.CORSA Exhaust and Engine-Specific ProjectsCORSA references include 2020–2022 Shelby GT500 active cat-back systems with different tip configurations. Match factory valve equipment, body and complete system coverage before comparing finishes. BBK headers, intake and MAF references span other engines and production ranges. Ford modular intake, Boundary oil-pump and Mishimoto EcoBoost intercooler references require their own exact engine and installation checks.Carbon Fiber, Fiberglass and Exterior DetailsAnderson Composites fenders, hoods and bumper inserts distinguish production ranges, materials and body applications. APR plate backing, S550 quarter louv...
View Ford Mustang Parts & Accessories Products


