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USA Standard Master Overhaul Kit for Ford 9in LM603011 Differential
The USA Standard ZK F9-C is a comprehensive master overhaul kit engineered specifically for the Ford 9-inch differential using LM603011 carrier bearings one of the most common configurations found in classic Mustangs, Fairlanes, F-100 pickups, and other Ford performance and muscle vehicles from the late 1950s through the late 1970s. The ZK F9-C bundles every component required for a complete differential rebuild including premium Koyo and Timken bearings, all matched races, pinion and axle seals, a pinion nut, crush sleeve, and shimming components — all in one convenient part number. The Ford 9-inch differential remains the most popular choice for high-performance street and race builds due to its strength and extensive aftermarket support, and the ZK F9-C gives you a one-stop solution for a proper rebuild. The ZK F9-C is covered by a lifetime limited warranty from Yukon Gear and Axle under the Magnuson-Moss Warranty Act.
What's Included
- Inner and outer pinion bearings (Koyo/Timken) with races
- Carrier bearings (LM603011) with races
- Pinion seal
- Axle seals
- Pinion nut
- Crush sleeve
- Pinion shims
- Ring gear bolts
Features and Benefits
- Complete kit for Ford 9in with LM603011 carrier bearings
- Premium Koyo/Timken bearings for OEM-level quality and durability
- All seals included to prevent leaks after rebuild
- One-stop sourcing eliminates individual part hunting
- Covers the most common carrier bearing configuration for the Ford 9in
- Lifetime limited warranty under Magnuson-Moss Warranty Act
Specifications
| Specification | Detail |
|---|---|
| Part Number (MPN) | ZK F9-C |
| Differential Application | Ford 9-inch |
| Carrier Bearing | LM603011 |
| Bearing Brand | Koyo / Timken |
| Warranty | Lifetime limited |
| UPC | 883584299501 |
Vehicle Fitment
The ZK F9-C fits Ford 9-inch differentials with LM603011 carrier bearings as found in 1957-1973 Ford Mustang, 1962-1976 Ford Fairlane, 1957-1979 Ford F-100 pickup, 1966-1977 Ford Bronco, and many other Ford passenger car and light truck applications of the era. The Ford 9-inch is also widely used in custom and race builds across all makes and years, making ZK F9-C the essential overhaul kit for any shop or enthusiast working with this differential.
Frequently Asked Questions
- How do I know if my Ford 9in uses LM603011 carrier bearings? The LM603011 is the most common carrier bearing for the Ford 9-inch. If in doubt, measure your existing carrier bearing before ordering.
- Does ZK F9-C include a ring and pinion set? No. ZK F9-C is an overhaul kit only. Ring and pinion gears are sold separately.
- What is the difference between ZK F9-C and ZK F9-A? The suffix letter denotes the carrier bearing size. Verify your specific carrier bearing before selecting the correct kit.
- Is professional installation required? Setting Ford 9-inch pinion depth and backlash requires specialized tools and experience. Professional installation is strongly recommended.
- Will ZK F9-C work with a third-member swap? Yes. The ZK F9-C is used when rebuilding a third-member assembly. It provides all bearings and seals needed for the job.
- Are synthetic gear oils compatible after rebuilding with ZK F9-C seals? The seals in ZK F9-C are compatible with quality petroleum-based and synthetic differential lubricants.
- What is the warranty on ZK F9-C? Lifetime limited warranty from Yukon Gear and Axle under the Magnuson-Moss Warranty Act.
- Does this kit include limited-slip clutch packs? No. ZK F9-C is a bearing and seal overhaul kit. Limited-slip rebuild components are sold separately.
Installation Instructions
Remove the third-member assembly from the housing. Disassemble and clean all components. Install new pinion bearings from ZK F9-C using a bearing driver. Set pinion depth with appropriate shims. Install the carrier with new ZK F9-C carrier bearings and adjust backlash to 0.008-0.012 inches for factory spec. Verify tooth contact pattern. Install new seals and reassemble. Refill with quality gear oil.
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