Yukon ZK GM8.2BOP 8.2in 10-Bolt Overhaul Kit for 1964-1972 Buick/Olds/Pontiac

Vehicle Fitment

• 1964-1972 Buick Skylark
• 1965-1972 Buick Electra
• 1964-1972 Oldsmobile Cutlass
• 1964-1972 Oldsmobile 442
• 1964-1972 Pontiac Bonneville
• 1964-1972 Pontiac Catalina
• 1964-1972 Pontiac Grand Prix
• 1964-1972 Pontiac GTO
• 1965-1972 Pontiac LeMans
• 1964-1970 Pontiac Tempest
• 1967-1972 Pontiac Firebird
• 1969-1972 Pontiac Trans Am

Fitment Notes

• Sources vary slightly on how long Oldsmobile 442 and Cutlass used this differential (1967 vs. 1972 end year) - confirm your rear end is the 8.2" 10-bolt BOP unit by physically checking cover bolt count and ring gear diameter before ordering
• Fits the GM 8.2" 10-bolt rear differential shared across these Buick, Oldsmobile, and Pontiac platforms; identify by 10 differential cover bolts and 8.2" ring gear diameter rather than by year/model alone, since some trims and model years used other rear axle designs

Features

• Complete master overhaul kit for the 1964-1972 GM 8.2" 10-bolt BOP differential
• Built with 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
• Backed by a 1-year warranty against manufacturer defects
• Suited for classic muscle car restorations, ratio changes, or posi/locker installations

Specifications

• Differential: GM 8.2" 10-bolt BOP (Buick/Oldsmobile/Pontiac)
• Cover bolts: 10
• Ring gear diameter: 8.2"
• Bearing brand: Koyo
• Warranty: 1 year against manufacturer defects

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 GM8.2BOP is a complete master overhaul kit for the GM 8.2" 10-bolt rear differential shared across Buick, Oldsmobile, and Pontiac muscle cars and full-size models from 1964 to 1972. Known in the industry simply as the "BOP" differential for the three brands that used it, this axle appeared under a wide range of nameplates - from the Skylark and Electra to the GTO, 442, and Firebird - making correct identification by physical spec more important than relying on year and model alone.

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 a proper reassembly. Built with Koyo bearings, it's designed to restore correct bearing preload and gear backlash after wear, a gear ratio swap, or a posi/locker installation - a common step in classic muscle car restorations and rear-end rebuilds.

Before ordering, confirm your differential is the 8.2" 10-bolt BOP unit by checking cover bolt count and ring gear diameter, since several of these platforms also used other GM rear axle designs depending on trim, engine, and model year. 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 if you're changing ratio. Installation requires full differential disassembly and proper backlash/preload setup, so it's best suited for an experienced DIY installer or a differential shop.