Drivetrain› Differentials and Rear-End Components

USA Standard Gear

Ring and Pinion Gear Kit

$1,568.88

SKU: ZGK2051

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Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
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Moderate — 2–4 hours

Overview

The USA Standard Gear ZGK2051 is a Posi rear axle ring and pinion gear kit designed to enhance torque and acceleration for your F-150. It features a 3.73 gear ratio and is constructed from durable, heat-treated steel for quiet and smooth operation. This kit includes all necessary components for installation and is backed by a limited one-year warranty.
Show original supplier description
The USA Standard Gear 8.8-Inch Posi Rear Axle Ring and Pinion Gear Kit, model ZGK2051, is engineered to significantly improve the torque and acceleration capabilities of your F-150. With a 3.73 gear ratio, this kit is particularly beneficial for drivers who frequently tow or engage in off-road activities, providing the necessary power boost. Constructed from durable, heat-treated steel, the components of this ring and pinion gear kit are precision-machined. This ensures not only robust performance capable of handling high-stress driving but also quiet and smooth operation, contributing to a more refined driving experience. The kit comes complete with all necessary hardware for a comprehensive installation. Installation of this gear kit is categorized as hard and demands advanced mechanical skills and specialized tools. Due to the complexity involved, professional installation is strongly recommended to guarantee proper setup and achieve optimal performance. The kit is covered by a limited one-year warranty, offering assurance in its quality and longevity. This USA Standard Gear kit is specifically designed to fit 2004-2008 F-150 models.

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

BrandUSA Standard Gear
Part NumberZGK2051
CategoryDrivetrain
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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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