Strange Engineering are an excellent choice for street/strip, circle track, and off-road applications. Ensure your vehicle's full power potential makes it to the ground with equal distribution. These are some of the strongest and most durable locking carriers available. Clutch-type differentials from Strange Engineering utilize specially machined clutches, aircraft-quality steel side gears, and are quieter than one-piece units. These differentials are ideal for street use, and they can be rebuilt.

Strange 31 Spline Posi Unit
A perfect replacement for worn-out OEM clutch differentials
Forged steel halves eliminate breakage common to cast units

Features
Forged Steel Case Halves
• Heat treated
• Fully machined
• Provides a light, durable, and rigid unit

Proven Quality
• Designed, machined, & assembled by Strange
• Materials made in the USA

Note
This is intended as a factory replacement
For high output vehicles, consider options below

Gear Lube
DO NOT USE SYNTHETIC GEAR OIL
Will adversely affect unit operation and void warranty

Use Petroleum Based 80W-90 or 85W-140 Gear Oil
Requires (1) 4 ounce bottle of limited-slip additive

Related Components
Eaton Truetrac…………………… N1979
Eaton Detroit Locker………….. N1971

S-Series case……………………… N2205
Pro Iron case……………………… N1905
HD Pro Alum case kit…………. P3200

Side bearings & races….. D1586 / D1588

Alloy axle package……….. P3102 / P3104

More From This Category

Motive Gear Ring and Pinion, 5.13 Ratio, For D60XF/D80R, 9.75/11.25 in., Kit

Motive Gear Ring and Pinion, 5.13 Ratio, For D60XF/D80R, 9.75/11.25 in., Kit

$1,687.68

View
PowerTrax Grip Pro Lock Right Locker, D50 30 Spline, Kit

PowerTrax Grip Pro Lock Right Locker, D50 30 Spline, Kit

$747.03

View
Motive Gear Differential, Open, Empty, GM, 9.5 in., Each

Motive Gear Differential, Open, Empty, GM, 9.5 in., Each

$437.38

View
Motive Gear Cross Pin, GM, 12-Bolt, 8.875 in., Each

Motive Gear Cross Pin, GM, 12-Bolt, 8.875 in., Each

$36.97

View
Motive Gear Ring and Pinion, 3.55 Ratio, For Chrysler, 9.25 in., Set

Motive Gear Ring and Pinion, 3.55 Ratio, For Chrysler, 9.25 in., Set

$444.56

View
Motive Gear Ring and Pinion, 5.29 Ratio, For Toyota, 10.5 in., Set

Motive Gear Ring and Pinion, 5.29 Ratio, For Toyota, 10.5 in., Set

$692.51

View