Re: looking to lock the front
this is a good question...
I have seen (and installed several lockers in rigs without locking hubs in the front. I have determinbed that its NOT a good idea...heres why.
case number 1:
not sure if you met Joe the cherokee guy, but he had a lockright in the front of his rig for about 2 months before...blamo...toast.
case number 2:
Peteyg on this board had a full case detroit in the front of his TJ for about 2 years. Saturday we were out doing very very mild wheeling and..snap crackle pop..but it wasn't rice crispies, and costs a whole lot more.
case number 3:
I bought a used ARB off ebay that I knew took a thrashing, ran it for years and sold it for more than I paid. I really think its the best way to go, and if you figure in that at most the detroit lasted 2 years in the front, the ARB is gunna be cheaper in the long run.
There are other options...
you could put a hub conversion kit on the 30, and toss in a lockright for a little more $$$$ than the ARB, but the on/off thing on the trail is nice when you are wheeling....though locking hubs are really nice too.
I think that lockers just plain wear out quickly in the front of tj/xj's unless they are selectable.