1974 Pontiac Firebird Differentials

Yukon Performance 1-3/4″ deck steel spool for 8.5″ GM with 30 spline axles. Uses large bearings, 1.785 journals. Yukon performance spools are made from the highest quality materials to ensure high strength and long life in performance applications. Spools provide 100% power to both tires at all times and are a lower cost alternative to lockers. Spools are not recommended for street driven vehicles. Yukon Performance spools come with a one year warranty against manufacturing defects. This spool requires the use of a C-Clip eliminator kit to be used.

Product Features:

• Fits GM 8.5″ with 30 spline axles
• 2.73 and up ratios only
• Provides 100% traction to both wheels at all times
• Not recommended for street driven vehicles

Yukon 4340 Chrome-Moly replacement outer stub for D44 ’87-’94 Wrangler with a length of 8.31″ and 27 splines. Yukon 4340 Chrome-Moly axles provide up to 50% increased strength over stock axles for use in extreme performance applications with large tires and high horsepower. Yukon’s 4340 axles are manufactured using the latest technologies and the highest quality materials to ensure high strength and long life. Limited Lifetime warranty covers manufacturing defects and axle breakage for as long as you own the vehicle. This warranty is not transferable to another party. “No Questions Asked” replacement for first warranty return, however Yukon reserves the right to either replace axle or refund original purchase price after the first warranty claim. Yukon (through Randy’s ring & pinion) makes final determination on warranty considerations.

Product Features:

• 27 spline
• 8.31″ long
• Fits Dana Spicer 30 in 1987-1994 Wrangler
• Outer stub
• 5-760X U-joint size
• 4340 Chromoly
• For WARN hub conversion only

Product Features:

• MINI INSTALL KIT GM 8.5 REAR

Yukon spider gear set for GM 8.2″ Buick, Olds, Pontiac Dura Grip posi, 28 spline. This kit does not include clutches. This kit fits Yukon Dura Grip ONLY.

Product Features:

• Spider gear kit
• Fits 8.2″ Buick, Oldsmobile and Pontiac with Dura Grip positraction
• Includes two side gears, four pinion gears, cross pin shaft, roll pin and spider gear thrust washers.

3 Qt. Penzoil 80W90 conventional gear Oil.

Product Features:

• Includes three quarts of conventional oil

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Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

Product Features:

• Meets or exceeds OE specifications

Bearing race driver. No return.

Product Features:

• Bearing race driver
• Fits HM88610 race
• All steel construction

HM89249 set-up bearing (one bearing). No return.

Product Features:

• Set up bearing
• Fits HM89249 pinion bearing
• Easily slips on and off pinion journal to allow for pinion depth adjustment

Yukon Minimum installation kits are a low cost solution for gear changes in newer vehicles where the bearings can be reused. This kit uses all high quality components to ensure a smooth set up. kit includes a pinion seal, crush sleeve (if applicable), complete shim kit, marking compound and brush. (includes Supershims)

Product Features:

• Fits GM 8.5″ rear
• Included are a pinion seal, crush sleeve , complete shim kit, marking compound and brush.

Yukon Carrier installation kits are great, low cost kit for carrier changes such as Positraction or locker upgrades. Carrier installation kit for GM 8.5″ differential with HD bearings for large journal carrier. This kit contains carrier bearings, races and shims. This kit is used in 8.5″ differentials using a Yukon Dura Grip, Eaton posi, ValueTrac, True Trac, Pro-Series Auburn, Detroit Locker or standard carrier with large bearing journals.

Product Features:

• Fits GM 8.5″ with aftermarket positraction
• Works with Heavy Duty Bearings
• Includes carrier bearings and races and “super” carrier shim kit

This differential pinion shaft lock bolt is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.

Product Features:

• Direct replacement – this differential pinion shaft lock bolt matches the fit and function of the factory part on specified years, makes and models
• Ideal solution – this bolt is a reliable replacement for an original part that is missing or has failed due to fatigue
• Durable construction – this part is made from quality materials to ensure reliable performance and long service life
• Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

Fel-Pro® gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:

• Meets or exceeds all original equipment specifications
• Application specific design to ensure a perfect fit
• Unsurpassed quality you can trust
• Validated for fit, form and function
• Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes

8.5″ & 8.6″ GM standard Open pinion gear Thrust washer. also fits 8.5″ Eaton with 0.795″ cross pin.

Product Features:

• Pinion gear thrust washer for GM 8.5″ and 8.6″
• Fits standard open differentials only
• 0.795″ I.D.

Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

Product Features:

• Meets or exceeds OE specifications

Standard Open and positraction cross pin shaft for GM 12T, 12P, and 55T.

Product Features:

• Cross pin shaft for GM 12 bolt passenger car and truck
• Fits standard open and positraction applications

Polished aluminum cover for 12P GM.

Product Features:

• Fits GM 12 bolt passenger car
• Finned polished aluminum

Standard open side gear thrust washer for 8.5″ GM.

Product Features:

• Side gear thrust washer
• Fits GM 8.5″

The Yukon carrier bearing Puller works with an impact gun to quickly and safely remove carrier bearings without damaging them. This unit comes with a handy bench top stand and works with up to most standard one ton applications. This unit is works with differentials up to one-ton applcations. It is not compatible with Dana 70HD, Dana 80, 10.25″ & 10.5″ Ford, or GM & Chrysler 11.5″ differentials.

Product Features:

• Carrier bearing puller
• Works with an impact gun to safely and easliy remove carrrier bearings
• Not compatible with Dana 70HD, Dana 80, Ford 10.25″ and 10.5″ or Gm and Chrysler 11.5″ applications

Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

Product Features:

• Meets or exceeds OE specifications

The Yukon Grizzly Locker is the ultimate in locking differentials for street, off-road, & drag racing. Grizzly Lockers provide 100% power to both tires, while still allowing for disengagement while negotiating turns. The Yukon Grizzly locker is a mechanical locking differential. It features 8620 internals for maximum strength. It’s patented design reduces common locker failures. All units assembled in the USA! All Grizzly Lockers are backed by the best warranty in the business! Yukon covers the replacement unit and covers any collaterally damaged parts and associated labor, up to $2,000!

Product Features:

• Fits GM 8.5″ and 8.6″ with 30 spline axles
• 2.73 and up ratio only
• Patented internal design reduces common locker failures
• 8620 internals for added strength
• Assembled in the USA

National Oil Seals & Bearings offer a full line of premium oil seals and bearings.

Product Features:

• CONSISTENT PERFORMANCE — Matched cup and cone components ensure consistent performance
• PREMIUM MATERIALS — Precision manufactured using premium-grade steel for outstanding durability and performance
• SMOOTH ROTATION — Crowned raceways and rollers for even load distribution
• OE-STYLE DESIGN — Engineered to meet OE specifications
• COMPREHENSIVE COVERAGE — Industry-leading coverage for domestic and import applications
• RIGOROUS TESTING — Comprehensive testing throughout design and development processes by National engineers for quality you can count on

Pinion nut for GM 7.2″ IFS, 7.5″, 7.6″, 7.6″ IFS, 8.0″, 8.25″, 8.5″, 8.6″, 9.25″ IFS, 9.5″ & Oldsmobile Dropouts. 1 1/4″ socket, 7/8″ x 14 thread.

Product Features:

• Pinion nut for GM 7.2″, 7.5″, 7.625″, 8.0″, 8.25″ IFS, 8.5″, 8.6″, 9.25″ IFS and 9.5″
• 7/8″ x 14 thread
• 1 1/4″ socket

Yukon Pinion installation kits are a terrific solution for gear installation on lower mileage vehicles where the carrier bearings & races can be reused. This kit uses Timken bearings and races along with a high quality pinion seal and small parts. Included in this kit are the pinion bearings and races, pilot bearing (if applicable), crush sleeve (if applicable), complete pinion shim kit, thread locker, and marking compound with brush. Yukon does extensive research for each application to make sure your kit will arrive with all the correct parts you need to install your pinion gear.

Product Features:

• Fits GM 12 bolt passenger car
• Included are pinion bearings and races, pinion seal, crush sleeve, complete pinion shim kit, and marking compound with brush.

7.75″ pinion seal.Yukon Mighty seal.

Product Features:

• Pinion seal
• Fits GM 7.75″

Worn or damaged differential end yoke causing driveline Vibrations! This direct replacement end yoke matches the original equipment part for a trustworthy repair and reliable performance.

Product Features:

• Direct replacement – this differential end yoke matches the fit and construction of the original yoke
• Excellent value – this replacement end yoke offers original equipment quality at a fraction of the price of dealer parts
• Quality materials – this end yoke is machined from cast iron for strength and is precision machined for reliability
• Validated fit – this differential end yoke has been tested to confirm accurate fit

Yukon positraction internals for GM 12P and 12T with 33 spline axles. Yukon uses higher quality materials and better techniques than OEM to ensure a longer lasting spider gear set. This kit does not include clutches. All components come with a one year warranty against manufacturing defects.

Product Features:

• Spider gear kit
• Fits GM 12 bolt passenger car with 33 spline Dura Grip positraction
• Includes two side gears, two pinion gears, cross pin shaft, roll pin and spider gear thrust washers.

Product Features:

• Spider gear kit
• Fits GM 8.5″ 30 spline open differential
• Includes two side gears, two pinion gears, cross pin shaft, cross pin bolt and spider gear thrust washers.