Drivetrain› Differentials and Rear-End Components

Yukon Gear & Axle

REAR AXLE KIT FITS GM 12T DIFF 30 S

$216.23

SKU: Y001 ZA K630105

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

Easy — 1–2 hours

Description

REAR AXLE KIT FITS GM 12T DIFF 30 S

MIA's Description

The Yukon Gear & Axle ZA K630105 is a rear axle kit designed for GM 8.875 in. differentials. It features 30 splines and a length of 31.4375 inches, with a 6 x 5.5 in. bolt pattern. This kit includes essential components for replacement or upgrade, such as a wheel bearing, seal, differential cover gasket, studs, and lug nuts.

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

BrandYukon Gear & Axle
Part NumberY001 ZA K630105

Videos

Yukon Gear & Axels posi Differential with 4.10 Gears on my 2019 Silverado 1500 RWD🥵

Yukon Gear & Axels posi Differential with 4.10 Gears on my 2019 Silverado 1500 RWD🥵
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
How to build the ultimate GM 7.5 rear end build

How to build the ultimate GM 7.5 rear end build
WHAT ARE CUT-TO-FIT AXLES? | EXPLAINED

WHAT ARE CUT-TO-FIT AXLES? | EXPLAINED
Yukon Dura Grip Positraction - Installation Tips

Yukon Dura Grip Positraction - Installation Tips
How to: Rebuild a GM 8.5in 10 bolt rear differential - Start to finish rear end rebuild in 7 min!

How to: Rebuild a GM 8.5in 10 bolt rear differential - Start to finish rear end rebuild in 7 min!
Full axle rebuild for a GM 10 bolt to handle over 500 horsepower

Full axle rebuild for a GM 10 bolt to handle over 500 horsepower
GM 12-Bolt rear diff UPGRADE: Positraction and gear swap | Hagerty DIY

GM 12-Bolt rear diff UPGRADE: Positraction and gear swap | Hagerty DIY
How-to Install Moser C-Clip Eliminators on a GM 10-Bolt (30 Spline Axles)

How-to Install Moser C-Clip Eliminators on a GM 10-Bolt (30 Spline Axles)
Yukon Gear & Axle Dura Grip - What's the difference?

Yukon Gear & Axle Dura Grip - What's the difference?
Yukon Gear vs USA Standard Gear Axles

Yukon Gear vs USA Standard Gear 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
GM 8.5 10 bolt gear setup and final assembly

GM 8.5 10 bolt gear setup and final assembly
Ford 9 inch gear swap/ upgrade from 28 to 31 spline axles.

Ford 9 inch gear swap/ upgrade from 28 to 31 spline axles.
How-to Install a Spartan Locker in a GM 8.5 10-Bolt (No Gear Reset Needed)

How-to Install a Spartan Locker in a GM 8.5 10-Bolt (No Gear Reset Needed)
Spider Gear Installation Explained | Differential Tech Tips

Spider Gear Installation Explained | Differential Tech Tips
Gear Ratios 101: What's better? 3.73 or 4.10? | A Simple Breakdown w/ Driving Examples

Gear Ratios 101: What's better? 3.73 or 4.10? | A Simple Breakdown w/ Driving Examples

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