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

Strange ,GM 12 Bolt Car 30 Spline Eaton Truetrac 3 Series

Strange ,GM 12 Bolt Car 30 Spline Eaton Truetrac 3 Series

$1,658.79

Motive Gear Ring and Pinion, 4.88 Ratio, For Toyota, 8.2 in., Set

Motive Gear Ring and Pinion, 4.88 Ratio, For Toyota, 8.2 in., Set

$490.83

EATON Differential, Detroit Truetrac, 27-Spline, Dana 30, Each

EATON Differential, Detroit Truetrac, 27-Spline, Dana 30, Each

$972.77

Motive Gear Clutch Pack Plate, For Ford 8, For Ford 9, Each

Motive Gear Clutch Pack Plate, For Ford 8, For Ford 9, Each

$37.25

EATON Differential, No Spin, 16,

EATON Differential, No Spin, 16,

$1,646.84