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Drivetrain› Differentials and Rear-End Components

USA Standard Gear

Full Spool

Name: Full Spool
Brand: USA Standard Gear
SKU: ZP FSD60-4-30

$343.11

SKU: ZP FSD60-4-30

Free Shipping over $200

$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Overview

The USA Standard Gear ZP FSD60-4-30 is a steel spool designed for Dana 60 axles with 30 spline axles and a 4.56 & up gear ratio. It provides 100% traction to both wheels at all times. This spool is not recommended for street-driven vehicles.

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The USA Standard full spool is engineered for maximum traction, ensuring 100% power is delivered to both rear wheels simultaneously. Constructed from 8620 steel and heat-treated for durability, this spool integrates with your existing gears by connecting to the ring gear and axle shafts. It provides equal power distribution to both sides without requiring additional components or engagement mechanisms. It is important to note that due to the spool's nature of preventing independent tire rotation, it is not recommended for street-driven vehicles. Installation by a professional shop is recommended due to the complexity and specialized tools often required for differential work, although a DIY installation is possible for those with the necessary expertise and equipment. USA Standard Gear provides a limited warranty covering defects in materials and workmanship, provided the product is installed and maintained according to instructions and has not been subjected to modification, accident, abnormal use, or misuse. This warranty excludes implied warranties of merchantability or fitness for a particular purpose and does not cover incidental or consequential damages.

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

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Specifications

Brand	USA Standard Gear
Part Number	ZP FSD60-4-30
Category	Drivetrain

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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.

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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.

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