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Nitro Helix, Helical Gear Limited Slip Differential
AAM, GM, Chrysler 11.5"
14 Bolt Full Float

Nitro Helix Helical Gear Limited-Slip Differential

Price: $899.86

Product Code: TORS-CHY11.5-30

Description Vehicle Applications Warranty Information

Dodge or GM (AAM) 11.5" 14-Bolt, Full Float Rear
Nitro Helix, Helical Gear Limited-Slip Differential

2003-2009 Dodge Ram 2500 w/ Cummins Diesel
2003-2009 Dodge Ram 3500
2010-Present Ram 2500
2010-Present Ram 3500 (Tech Note: Will not fit 2016+ 3500 Dually with Aisin as they used a 16 bolt ring gear)
2001-Present Chevy Silverado 2500HD w/ Duramax
2001-Present Chevy Silverado 3500HD w/ Duramax
2001-Present GMC Sierra 2500HD w/ Duramax
2001-Present GMC Sierra 3500HD w/ Duramax
2001-2007 Chevy Silverado 2500HD w/ Vortec 8.1L Big Block
2001-2007 Chevy Silverado 3500HD w/ Vortec 8.1L Big Block
2001-2007 GMC Sierra 2500HD w/ Vortec 8.1L Big Block
2001-2007 GMC Sierra 3500HD w/ Vortec 8.1L Big Block

Differential: AAM11.5" 14 Bolt
Gear Ratio: 3.42 - 5.13
Axle Splines: 30
Ring Gear Bolts: 12 (not included)
Manufacturer: Nitro Gear & Axle
Warranty: 1 Year

You'll want to check out this article on Overland Journal/Expedition Portal about the benefits of installing a Nitro locker.

The Nitro Helical Worm Gear is a torque-sensitive mechanical limited-slip differential that uses worm gears and spur gears to dispense and distinguish input power between two drive wheels or front and back axles. This is a completely separate design from the common beveled spider gear designs seen in most of the automotive industry.

Just like any LSD, the Nitro Helical Worm Gear functions as a standard or open differential under normal driving conditions, allowing one wheel to spin faster or slower as necessary. When a wheel experiences a loss of traction, the gear separation forces start to take effect and distributes the torque to the high-traction wheel by increasing the helical-shaped gears mesh force until wheel spin is reduced or entirely stopped. Once the vehicle exits the low traction condition, the differential resumes normal operation.

What's nice about the operation of a Nitro Helical Worm Gear LSD, is its characteristics; smooth, quiet and automatic. This LSD will engage without any driver awareness or require any action. It also has no wearable components and requires no maintenance, producing less time on the rack and more on the road.

Nitro Gear & Axle strives to provide the highest quality differential & axle components available. We take the steps necessary to ensure our parts are dependable. Our product range is continually growing to meet the needs of consumers for new ratios and Fits. At Nitro we know differentials, and know what it takes to provide you with high quality components.

Nitro Gear and Axle Premium Differential Ring and Pinion Gears, Axles and parts


This product can expose you to chemicals including toluene and benzene, which are known to the State of California to cause cancer and birth defects or other reproductive harm.
For more information go to: www.P65Warnings.ca.gov

  • Limited-slip operation
  • Helical-style pinion gears
  • Maintenance free
  • No additive required
  • No Clutches or cones to wear out
  • Smooth/Great traction improvement even over an OEM LSD
  • 1 Year Warranty*

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