The Electrac comes with a...
The Electrac comes with a complete wiring harness and lighted switch, the actuator, the guard, the diff cover, an emergency kit, and the Electrac unit itself. We completed our West Coast Differentials order with a Sierra master install kit just in case we found any worn bearings in our Dana 44.
Apparently, the Electrac takes about 50 miles or so to break in. Ours made some strange sounds when cornering and felt like it was grabbing at first, but these characteristics went away quickly. The limited-slip mode provides much better streetability than a regular full-time locker, but you can still feel some torque-steer input from the Electrac, especially around tight corners when you're really on the gas. It's a very aggressive limited slip and proves it by providing traction to both wheels better than any clutch-type limited slip we've used and, dare we say, better than the limited-slip mode of the rear Wrangler Rubicon locker. The limited-slip function of the Electrac is also a bonus on icy roads where an open diff isn't enough and a full locker or spool can send your Jeep sideways, and it won't wear out like a clutch-type limited slip.
The first thing everyone says is, "The plastic actuator is gonna get hit and break off, and then I'm screwed." That's not quite true--a 1/4-inch-thick guard is included with the locker. It is also easily reinforced should you be the kind of driver who finds a way to destroy anything. If the actuator does for some reason fail, a replacement is just as easy to find as your local GM dealer. It's the same actuator found in the front axle of an '02 Trail Blazer. No GM dealer around? No problem--the Electrac comes complete with an emergency block-off plate and spring that allow the locker to be engaged or disengaged. By simply removing the actuator and installing the plate alone (locked) or the spring and plate (limited-slip mode), you'll be on your way in no time.