Ford 9 Inch Detroit Soft Locker, 31 Spline 187SL17B
Eaton Detroit Locker
1978-86 Ford Bronco
1966-86 Ford Truck
Part Number 12275 recommended
The Detroit Locker® is a fully automatic locking differential well known throughout the years for it’s premium performance and dependable operation.
It maximizes traction by delivering 100 percent of the torque and power to both drive wheels.
Engineered to keep both wheels in a constant drive mode, it unlocks automatically to permit necessary wheel speed differentiation.
Improved design performs like standard (open)
differential in normal driving...until you need it.
•Limits wheel spin on wet, muddy and icy terrain
for maximum traction.
•Improves handling and increases tread life by allowing differences in wheel speed when turning or operating on uneven surfaces.
•Dependable, rugged automatic system.
•Smooth operation - even in front drive steering axles.