American Motors, Ford, International, Jeep... (4WD) Differential Spool - USA Standard Gear - SL D30-27

Spartan Locker
SL D30-27
For Jeep JK D30 applications a case, YC D706008, must be purchased. The JK case is around .030" wider.
17-66 VOL/JEP/FRD
Spartan Locker for Dana 30, 27 spline axles, with heavy-duty cross pin shaft
D30 27spl SPARTAN LOCKER, with_X/P
The Spartan Locker is a lunchbox locker that delivers reliable, 100% lockup traction at a low cost. It's design does not use the thrust washers and has a revolutionary spring and pin design that makes installation a snap!
The Spartan Locker by USA Standard Gear provides reliable traction at a low cost. The Spartan Locker's patent pending design replaces the spider gears in a standard carrier case, does not use the thrust washers, and has a revolutionary spring-and-pin design that makes installation even easier! This style of locker is known as a lunchbox locker because of its compactness. The Spartan Locker features heat-treated 9310 steel internals for enhanced durability. The advantages of utilizing a Spartan Locker are its 100% lock up and affordability, both in initial cost and installation cost. The install is easier on the wallet because the differential does not need to be removed for installation. In fact, some enthusiasts install the unit themselves versus taking it to a shop.
Fits Dana Spicer 30 with 27 spline axles
Made from 9310 steel for added strength
Replaces the spiders in a standard carrier case
Mechanical locker delivers reliable 100% lockup
Spartan Locker for Dana 30 diff, 27 spline, includes heavy-duty cross pin shaft