I ran it without lockers on 30 GSA's in my 04 unlimited. As long as you know how to drive, and watch your lines and have a backup person in front of you with a strap you will be fine (your undercarriage might take a little beating )
We ran it a few weeks ago... two JKs with us had no lockers (one on 35s, one on 33s). Both winched on what I call LandRover Hill (as this is where I see them get stuck all the time). Better lines, more driver skill, and/or better adherence to spotter directions (you know who you are :thefinger and I don't think that either would have needed assistance.
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