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Yukon Gear & Axle YGLF9-31-LB Grizzly Locker Ford Spline Load Bolt Differential - 9 Inch 31

(Ford F-150 1975-87, Mustang 1965-73, Bronco 1966-86, Thunderbird 1955-79, Maverick 1970-77, Galaxie 500 1968-74, F-100 1957-83 + 18 more models)

Manufacturer

Picture for manufacturer Yukon Gear & Axle

Part Number

YGLF9-31-LB
13 reviews
Sale Price

$815.98

In Stock (10+)

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Usually delivered within 2 days

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Live-in-stock inventory

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Fitment guaranteed

Fitment guaranteed

Product Details

The Yukon Grizzly Locker is a mechanical positive-locking differential engineered for extreme performance applications including rock crawling, serious trail running, off-road racing, and drag racing. This unit is specifically designed for Ford 9-inch differentials with 31 spline axles and load bolt style housings.

Key Features:

  • 100% power delivery to both tires for maximum traction
  • Automatic disengagement during turns for improved handling
  • Patented inner clutch tooth design with larger radius base for up to 350% greater strength versus back-cut designs
  • Oversized teeth resist breakage from shock-loading and catastrophic axle failure
  • Forged chromoly construction for hardcore durability
  • Direct replacement for factory carrier—no case modifications required

The Grizzly Locker's advanced gear tooth geometry and robust materials make it one of the toughest automatic lockers available. Unlike limited-slip differentials that can fade under stress, this mechanical locker provides consistent, reliable performance in the most demanding conditions. Ideal for off-road enthusiasts and racers who need maximum traction without compromise.

Products specifications

Fits

Ford F-150 1975-87, Mustang 1965-73, Bronco 1966-86, Thunderbird 1955-79, Maverick 1970-77, Galaxie 500 1968-74, F-100 1957-83, Fairlane 1957-70, Ranchero 1957-79, Falcon 1960-70, Galaxie 1959-67, Gran Torino 1972-76 + 13 more models

Axle Shaft Spline Quantity

31

Prop 65

No

Easy with great prices

Quick and easy!!! The shipping was FAST, the packing was great and the merchandise top notch! The shipping and order notifications were also much appreciated. Great place to get Auto goodies. I will definitely be back to Autoplicity!

Very Quick and easy to place an order, let's see how fast it arrives!

So far so good thank you

competitive price and shipping cost

Nice having options other companies do not

live inventory is great... if it's true

My shopping experience is top notch. You actually had the brand I really wanted. the only real issue is shipping, didn't get a tracking number like promised items just showed up.

These are the best prices online, $1100 lift kit for $430. Insane.

Awesome that you can pay with Amazon!

quick and easy

good

Shopping experience was good. It's taken quite some time to find Splash Guards for my Raptor that will actually fit properly. Hopefully these are the ones (this is my third attempt).

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