I have an explanation on what I put in my rear end and why on my site

http://home.4x4wire.com/adamf/88/elocker.htm


That should sum things up for you. Basically you can get a manual selectable locker for $400-600 or a full time for $200-400. Manual you can be fully unlocked for a stock ride on the street, and a full time can have some poor handling characteristics such as tire squealing, clicking, and ratcheting noises.

88 4R, 350 V8, R150 5 speed Sold <...uot; />
97 4R, stock, daily driver
98 Sienna, kid and dog hauler, wife's ride