Drivetrain› Differentials and Rear-End Components

USA Standard (Yukon)

Rear Axle Kit Fits Ford 8.8 Diff 31 Spline 5 Lug RH 27-13/16 Long

$230.89

SKU: U018 ZA K630231

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $100
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

Rear Axle Kit Fits Ford 8.8 Diff 31 Spline 5 Lug RH 27-13/16 Long

MIA's Description

The USA Standard Gear ZA K630231 is a rear axle kit designed for Ford 8.8-inch differentials. It features 31 splines, a 5-lug pattern, and a right-hand orientation, with a length of 27.8125 inches. This kit includes essential components like a wheel bearing, seal, differential cover gasket, studs, and lug nuts to facilitate replacement, repair, or upgrades.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandUSA Standard (Yukon)
Part NumberU018 ZA K630231

Videos

Building a Budget 400 HP 8.8 Rear Axle UPGRADES Shown!

Building a Budget 400 HP 8.8 Rear Axle UPGRADES Shown!
WHAT ARE CUT-TO-FIT AXLES? | EXPLAINED

WHAT ARE CUT-TO-FIT AXLES? | EXPLAINED
CHOOSING YOUR FORD 9 INCH YOKE - 1310 - 1330 - 1350 | EXPLAINED

CHOOSING YOUR FORD 9 INCH YOKE - 1310 - 1330 - 1350 | EXPLAINED
LSD diff locker Install 8.5"/8.6" GM Axle, Yukon Gear YDGGM8.5-3-30-1

LSD diff locker Install 8.5"/8.6" GM Axle, Yukon Gear YDGGM8.5-3-30-1
Complete Differential Overhaul: DIY Step-by-Step Tutorial. ( Differential Rebuild/Upgrade Ford 8.8)

Complete Differential Overhaul: DIY Step-by-Step Tutorial. ( Differential Rebuild/Upgrade Ford 8.8)
Which Traction Device is Right for You?

Which Traction Device is Right for You?
Mustang Gear Install: Ford Racing 8.8 Ring & Pinion | 1986-2009

Mustang Gear Install: Ford Racing 8.8 Ring & Pinion | 1986-2009
Ford 9 inch gear swap/ upgrade from 28 to 31 spline axles.

Ford 9 inch gear swap/ upgrade from 28 to 31 spline axles.
No BS GM 8.5/8.6 10 Bolt Ring and pinion gear install axle setup

No BS GM 8.5/8.6 10 Bolt Ring and pinion gear install axle setup
Moser Minute --What is Axle Spline?

Moser Minute --What is Axle Spline?
Yukon Gear & Axle Ultimate 88 Install (Part 2)

Yukon Gear & Axle Ultimate 88 Install (Part 2)
Yukon Gear & Axle Dura Grip - What's the difference?

Yukon Gear & Axle Dura Grip - What's the difference?

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy