My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

ARB RD81 Air Locker Locking Differential - Kit

(Ford F-150 1983-2003, Ranger 1990-2011, F-250 Super Duty 1999-2019, Explorer 1991-2014, Expedition 1997-2001, F-250 1997-99, Bronco 1983-96 + 17 more models)

Part of: ARB Air Locker Locking Differential

Other options in this family: ARB RD132 ARB RD101 ARB RD142 ARB RD90 ARB RD139

Manufacturer

Picture for manufacturer ARB

Part Number

RD81
13 reviews
Sale Price

$1,299.95

In Stock (10+)

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The ARB RD81 Air Locker is a selectable locking differential designed to provide maximum traction in challenging off-road conditions. When activated, the Air Locker locks both wheels on an axle together, ensuring they rotate at the same speed regardless of available traction. This allows you to maintain forward momentum through mud, sand, snow, and rock crawling situations where open differentials would leave you stranded.

Key Features:

  • Pneumatically activated locking mechanism for on-demand traction control
  • Seamless engagement and disengagement via dash-mounted switch
  • Retains normal differential operation when unlocked for street driving
  • Forged gear construction for exceptional strength and durability
  • Complete kit includes replacement differential carrier, electronic activation switch, air compressor solenoid valve, air lines, and bulkhead fittings
  • Proven design trusted by off-road enthusiasts and professional expeditions worldwide

Unlike limited-slip or automatic locking differentials, the ARB Air Locker gives you complete control over when locking occurs, preserving tire life and drivetrain components during normal driving while delivering 100% lock-up when you need it most. The system operates on compressed air, making it reliable in extreme temperatures and conditions where electronic lockers may fail.

Products specifications

Fits

Ford F-150 1983-2003, Ranger 1990-2011, F-250 Super Duty 1999-2019, Explorer 1991-2014, Expedition 1997-2001, F-250 1997-99, Bronco 1983-96, Crown Victoria 2003-11, Explorer Sport Trac 2001-05, 2007-10, E-150 2003-14 + 14 more models

Prop 65

No

Fitment Info 1

Axle: Ford 8.8 in; Position: Rear; Shaft: 1.32 in; Spline: 31; Ratio: All

Color

Silver

Material

Steel

Lucas oil is amazing like always, but I felt like it was a bit over priced for 2 quarts of SAE 10W40 High Performance Motorcycle Oil, but other than that it's super fast shipping to your door an very easy ordering process online! I would definitely recommend this company, but the prices gotta come down some or at least give your new members or even the old ones coupon codes! Thanks, Cody.

Quick and easy to order.

Overall great customer service, I would recommend anyone to try thmotorsports.com

Cheapest price on Walker exhaust even with shipping and I am in the industry

Just what I ordered at a great price

thank you for your assistance

First off, I LOVE my new shipments! These guys had everything at super low prices, and the shipping was phenomenally fast. It's all working great, and imm definitely buying from these guys again.

Ordered a sling to store my roof rack. There was an issue with the supplier which was quickly resolved by the Autoplicity staff. Great customer service -- most responsive I've ever seen.<br><br>Best prices around.

good price, quick and easy ordering

Great service. Shipped out the day after I ordered it...plus it was the cheapest of the competition.

I bought a Motive pressure brake bleeder from Autoplicity. I have been looking around for different prices for quite a while, and their price, even with shipping cost, was the lowest. After ordering, I received a notification of shipment and tracking number. The item arrived well packaged, complete, and intact within a few days. I am looking forward to using it.

Cheap prices, great quality, and fast delivery. Autoplicity will continue to receive my patronage.

Easy and fast. Order arrived very fast. Thanks.

Share icon
Return Policy
Returns are easy at THMotorsports

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy