2011-2017 GMC Sierra 2500HD Nitro Gear Package Select Ratio

Vehicle Fitment

Chevy Silverado 2500HD (2011-2021)
Chevy Silverado 3500 (2011-2021)
GMC Sierra 2500HD (2011-2021)
GMC Sierra 3500 (2011-2021)

Description

2011-2017 GM 2500 & 3500HD (Duramax or 8.1L) with Salisbury Type Front Axle Nitro Front & Rear Gear Package Kit, Select Ratio

Recommended: 6 quarts of Nitro Synthetic Plus Gear Lube

Gear Package Kit Includes:

Nitro front ring & pinion
Nitro front Master Install Kit
Nitro rear ring & pinion
Nitro rear Master Install Kit

Suffering from poor performance and reduced fuel economy resulting from oversized tires?

A Nitro gear change will help get that performance and economy back!

If you've fitted larger tires to your vehicle then you are likely experiencing a loss in performance, fuel economy, and more constant transmission gear "hunting" />

It's a common misconception that gear changes are reserved only to hardcore off-roaders or trucks with huge tires. However, re-gearing is one of the single most beneficial modifications you can make to keep the performance, economy, and durability of your daily-driven 4x4. This is a mod for anyone with larger tires, increased weight, or for increased performance on stock vehicles for towing or increased acceleration.

We at Nitro Gear & Axle realize the difficulty for the average consumer or install shop to compile the list of parts and prices required when doing a gear change. To make it easier for everyone the experts at Nitro are introducing an industry first- "Gear Packages" for many popular 4x4 Fits. One part number. One price. One click away.

"Nitro Gear Install"

Features

Nitro Rings & Pinions:

8620 Steel Gear Forgings
Precision Machining
CNC Triple-lapping
Heat Treatment
Rockwell Hardness Tested

Nitro Master Install Kits:

Koyo

Specs

Front Differential: GM 9.25" Rev. IFS

Rear Differential: (AAM) GM 11.5"

Gear Ratio: 3.42, 3.73, 4.11, 4.30, 4.56, 4.88 or 5.13

Qualifier: with Duramax or 8.1L

Manufacturer: Nitro Gear & Axle

Warranty: 2 Years

FITMENT

2011-2017 GMC Sierra 2500HD & 3500HD 4x4 w/ Duramax Diesel, or 8.1L gas

2011-2017 Chevrolet Silverado 2500HD & 3500HD 4x4 w/ Duramax Diesel, or 8.1L gas

WARRANTY

*All Nitro Gear & Axle brand products are warrantied to be free of manufacturer defects for the specified period. Warranty requests must be made by the original purchaser and submitted by the dealer purchased from. Any parts sent for warranty consideration must be pre-approved and shipped prepaid freight to our facility with copy of RGA for our inspection & determination. We will not pay for labor, shipping cost, loss of revenue or perishable goods, commercial losses, costs of telephone calls, shipping or general inconvenience. This is our only warranty expressed or implied. Unauthorized warranty returns may be refused. Warranty generally covers MFG defects in material or workmanship. Abuse, overloading, improper lubrication, misuse, commercial or competition use voids warranty. Normal characteristics are not warrantable, such as Gear whine. Minor cosmetic flaws, dings, burrs from shipping or manufacturing, are not considered defect, it is installer responsibility to address these at time of install. Customer is responsible for shipping charges if warranty is granted. Warranty is for the original purchaser/user, is not transferable. Warranty covers one replacement or credit solely at our discretion. Warranty determinations are at our sole discretion.

In addition to the above conditions, see special notes for these products:

Ring & Pinion - Warrantied against manufacturing defects. 2 years from date of purchase. Must provide set-up specs.

Chromoly front Axles, Excalibur Joints, 30/30 Birfield kits - Warrantied against manufacturing defects for the life of the vehicle. These products are also covered for Breakage. The Shaft / joint must be BROKEN. Wear, twisting, bending are not warrantable. Damages caused by failure of other parts are not warrantable, for example broken U-joint (other than Nitro Excalibur) causing damage to Axle ears.

Rear Chromoly Axles - Warrantied against manufacturing defects for 5 years. These products are also covered for Breakage. The Shaft must be BROKEN. Worn, twisted, or bent axles are not warrantable.