if you wanna do away with the vacume connect..spend the cash and get a decent locker up front with a TJ axle shaft upgrade..... that will eliminate the vacume for good... thats the was to go unless you wanna spend more cash on the manual hub upgrade..and i don't suggest that on the d30 ..many like it but its exspensive and you could have another axle all together up there for the price <img src="/forums/images/graemlins/nana.gif" alt="" />