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3.73 & Down, 19 Spline, Dual Drilled 7/16" & 3/8", Rear
Nitro Helical Gear Limited Slip for Dana 44

Nitro Helical Type Limited-Slip Differential

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Price: $715.50

Product Code: TORS-D44-19-3

Description Vehicle Applications Warranty Information

Nitro Helix-Helical Gear Limited-Slip Differential
19 Spline, Dual Drilled 7/16" & 3/8" for Dana 44

1965-1970 Jeep CJ5 & CJ6
1957-1966 Ford F100 Pickup
1961-1988 Jaguar XKE XJS XK6
Checker Cab & Limousine
1964-1967 Sunbeam Tiger
1961-1971 International Scout
2018+ Mahindra Roxor

Differential: Dana 44
Gear Ratio: 3.73 & Down
Axle Splines: 19
Ring Gear Bolts: 10 (not included) Dual Drilled
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 Gear and Axle Helix-Helical Gear Limited Slip.

Tech Notes:
Dual Drilled 7/16" & 3/8"
19 spline Fits older Dana 44 Axles with 3.73 or lower numerical ratios.

The Nitro Helix-Helical Gear Gear is a torque-sensitive mechanical limited-slip differential that uses Helix-Helical 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 Helix-Helical Gear 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 Helix-Helical Gear 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

"The Dana 44 Trademark referred to herein are trademarks of Dana Limited. The Dana 44 trademark are used for informational purposes only, and there is no connection between Nitro Gear & Axle or JT's Parts & Accessories and Dana."


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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