USA Standard Gear NV4500 5th Gear 51T Manual

Description

Product Overview

The USA Standard Gear NV4500 5th Gear (model ZMNV17318) is engineered for 1995 and newer General Motors trucks equipped with the NV4500 manual transmission. Crafted from high‑strength alloy steel, the gear features a 51‑tooth configuration delivering a 5.61:1 ratio, optimized for torque multiplication and smooth acceleration. The exterior is precision‑machined for exact tooth geometry, reducing wear and ensuring long‑term reliability. Weighing 4.5 pounds and measuring 6 x 6 x 6 inches, the component fits seamlessly into the existing transmission housing without modification. Manufactured in the USA, this gear meets rigorous automotive standards and is backed by USA Standard Gear’s reputation for quality.

Usage

Designed for both daily driving and demanding off‑road conditions, the NV4500 5th gear excels in scenarios where low‑speed torque and precise control are essential. It is ideal for truck owners who tow heavy loads, engage in rock crawling, or require reliable performance in rugged environments. Professional mechanics will appreciate the straightforward installation process, which involves removing the transmission cover, swapping the stock gear, and re‑torquing to factory specifications. The gear’s robust construction makes it suitable for high‑temperature operation and repeated load cycles, ensuring consistent performance over the vehicle’s lifespan.

Why Choose Us

USA Standard Gear combines decades of engineering expertise with strict quality control. Each gear undergoes heat treatment and surface hardening to achieve a hardness rating that resists pitting and scoring. Our in‑house CNC machining guarantees tolerances within ±0.001 inches, delivering a perfect meshing interface with the existing transmission components. We provide a limited lifetime warranty, reflecting confidence in the product’s durability. Additionally, our customer support team offers technical assistance for installation and troubleshooting, ensuring a hassle‑free upgrade experience.

Key Features

• Precision‑machined 51‑tooth gear delivering a 5.61:1 ratio for optimal torque multiplication.
• High‑strength alloy steel construction with heat treatment for superior wear resistance.
• Exact CNC tolerances ensure seamless integration with existing NV4500 transmissions.
• Designed for 1995+ GM trucks, perfect for towing, off‑road, and heavy‑duty applications.
• Made in the USA with a limited lifetime warranty and dedicated technical support.

FAQ

Is this gear compatible with all NV4500 transmissions?

The gear is compatible with NV4500 transmissions found in 1995 and newer GM trucks, including Chevrolet and GMC models that use the 5‑speed manual layout.

Do I need special tools to install the gear?

Standard hand tools and a torque wrench are sufficient. The installation follows the factory service manual steps: remove the transmission cover, replace the gear, and torque the bolts to the specified values.

What is the expected lifespan of this gear under heavy use?

When maintained according to OEM guidelines, the gear can exceed 150,000 miles, thanks to its hardened steel and precise machining.

Can I use this gear for performance upgrades?

Yes, the 5.61 ratio provides stronger low‑speed torque, making it a popular choice for off‑road builds and trucks that frequently tow heavy loads.

Is there a warranty?

USA Standard Gear offers a limited lifetime warranty covering manufacturing defects, providing peace of mind for long‑term use.