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Here's an overview of installing an ARB up front. If you're considering it, I'd be happy to provide whatever info you need to get it done. ARB's instructions explain the ideal way to do it, but if things go wrong there are some details to setting up the diff which are useful.

http://www.4x4wire.com/toyota/4Runner/tech/ifs_airlocker/


Thanks for the awesome write-up. I already have it printed out in full color and it's resting right next to the front diff. I especially appreciate the tips on what spare parts to have on hand (eg bearings).