Yukon ZK F8.8-D Ford Super 8.8in Overhaul Kit for 2015-2026 Mustang/F-150

Vehicle Fitment

• 2015-2026 Ford Mustang - independent rear suspension (IRS), "Super 8.8" rear differential
• 2015-2026 Ford F-150 - solid (live) axle, "Super 8.8" rear differential

Fitment Notes

• Not all 2015+ F-150s use the Super 8.8 - some are equipped with the Ford 9.75" differential instead. Ford does not encode this in the VIN, so confirm which differential your truck has before ordering
• The Super 8.8 replaced the earlier Ford 8.8" (in production since 1983) starting in 2015 and is not interchangeable with pre-2015 8.8" parts
• This master overhaul kit's bearings, seals, and small parts are shared across both the Mustang IRS and F-150 solid-axle configurations, but ring & pinion gear sets are NOT interchangeable between the two - always order gears specific to your configuration

Features

• Complete master overhaul kit for the 2015+ Ford "Super 8.8" differential
• Built with high-quality Timken or Koyo bearings and races
• Includes a complete pinion shim kit for accurate gear setup
• Includes thread locking compound and marking compound for a verifiable, correctly-set install
• Bundles all major rebuild consumables into one kit
• Manufactured by USA Standard Gear
• Uses the beefier pinion bearing design carried over from the Ford 9.75" differential
• Suited for standard rebuilds, gear ratio changes, and locker/posi installations

Specifications

• Differential: Ford "Super 8.8" (2015 & up)
• Cover bolts: 12 (vs. 10 on the earlier pre-2015 8.8")
• Axle spline count: 34
• Bearing brand: Timken or Koyo

Included Components

• 1x Carrier bearing & race set
• 1x Pinion bearing & race set
• 1x Pinion seal
• 1x Complete pinion shim kit
• 1x Ring gear bolt set
• 1x Pinion nut
• 1x Crush sleeve
• 1x Thread locking compound
• 1x Marking compound with brush
• 1x Gasket

Product Description

The Yukon ZK F8.8-D is a complete master overhaul kit for Ford's "Super 8.8" differential, introduced in 2015 to replace the long-running Ford 8.8" that had been in production since 1983. The Super 8.8 comes in two forms: an independent rear suspension (IRS) version used in the S550 Mustang, and a solid axle version used in the F-150. Both share a common bearing design - including beefier pinion bearings, crush sleeve, seal, and pinion nut carried over from Ford's 9.75" differential - which is why a single master overhaul kit covers both configurations.

This kit bundles everything needed for a full rebuild into one part number: carrier and pinion bearings and races, pinion seal, a complete shim kit, crush sleeve, ring gear bolts, and the thread locker, marking compound, and gasket needed for proper reassembly. It's designed to restore correct bearing preload and gear backlash after wear, a gear ratio change, or a locker/posi installation on either the Mustang IRS or F-150 solid-axle Super 8.8.

Before ordering, confirm your F-150 actually has the Super 8.8 rather than the 9.75" differential, since Ford doesn't make this easy to verify from the VIN alone. This is a rebuild-support kit rather than a ring-and-pinion set, so it pairs with either your existing gears or a new gear set matched specifically to your IRS or solid-axle configuration. Installation involves full disassembly of the differential and proper backlash/preload setup, so it's best suited for an experienced DIY installer or a differential shop.