[Power Surge]

If you are looking to turn your open diff into a locker, there are two kits you can buy. One is the Powertrax Limited Slip, made by Richmond, and the other is the Powertrax Lock-Rite, also made by Richmond. Both of these devices are made to go into an open diff case, and they replace the spider gears, giving you a locking type differential. On the Ford 9" and 8", you will actually be reusing your side gears for the LockRite. The LockRite is cheaper (about $250) and is crude, but effective. It's popular with the off road guys. You will feel the rear end lock and unlock, and that takes some getting used to. The Limited Slip version costs about $450, but for that kind of money you can just get a real diff. The Limited Slip version is nicer on the street with less obvious engagement.

And also, Detriot Locker makes a version of the LockRite called the E-Z Lock. It's the same exact thing.