Product images and videos are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Drivetrain› Differentials and Rear-End Components

Zumbrota Drivetrain

GM 14-Bolt 30-Spline Steel Spool

Name: GM 14-Bolt 30-Spline Steel Spool
Brand: Zumbrota Drivetrain
SKU: YP FSGM14T-3-30

$596.89

SKU: YP FSGM14T-3-30

Free Shipping over $200

$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Advanced — 4+ hours

Overview

The Yukon steel spool is a performance differential component designed for GM 14-bolt trucks with 30-spline axles. It provides 100% power to both tires simultaneously for full-time lockup. This spool is suitable for use with 4.10 and down gear ratios or 4.56 and up thick gears.

Show original supplier description

The Yukon Steel Spool is engineered as a high-strength differential component for performance applications, offering a cost-effective solution for achieving full-time traction. This spool installs into a standard open carrier, delivering 100% of the engine's power to both rear wheels at all times, ensuring maximum grip. It is specifically designed to fit GM 10.5-inch 14-bolt truck axles with 30-spline count. The unit is compatible with 4.10 and down gear ratios, or 4.56 and up thick gears. Due to its full-time lockup nature, this spool is not recommended for street-driven vehicles. It is best suited for vehicles equipped with large tires or those generating high horsepower, where consistent traction is paramount.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

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

Brand	Zumbrota Drivetrain
Part Number	YP FSGM14T-3-30
Category	Drivetrain

Videos

Which Traction Device is Right for You?

Yukon Gear & Axle Ultimate 88 Install (Part 2)

5,000+ Trusted brands

1M+ Enthusiasts

5M+ Parts sold

(760) 282-4645 hello@motormia.co

Buy with Confidence

Returns & Fitment

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

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy