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Old 05-01-2014, 09:14 PM   #1
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Lunch Box Lockers?

Just wondering if you can still buy them, if they're worth it, and how time consuming they are to install.

I don't want to change the axles on my Jeep but would like the convenience of a posi while wheeling.

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Old 05-01-2014, 10:14 PM   #2
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I put a Spartan in the rear D35 C-clip type of my 1990 YJ, so for two years later all is fine and I love it. It's not a big job to install at home with just hand tools, takes about 4 hours if your not a wrench all the time guy, 2 hours if you are! With a locker in the rear your car will drive a little different, [a little pull this way on the gas and little pull that way down shifting], some say it's best to lock the Front, I will do that soon, also! LOL

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Old 05-01-2014, 11:45 PM   #3
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Just put this in my YJ, a little noisy but still better than open Dana 30 RMS Duratrax Locker 27 Spline DT D30-27 - Ron's Machining Service
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Old 05-02-2014, 12:25 PM   #4
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Someone told me that there are some that can be engaged and disengaged at the axle so for just driving around it's a slip diff but for wheeling you can look it in. Never heard of this setup before so it sounded like just a standard locker axle.
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Old 05-02-2014, 01:02 PM   #5
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Originally Posted by Joe Z View Post
Someone told me that there are some that can be engaged and disengaged at the axle so for just driving around it's a slip diff but for wheeling you can look it in. Never heard of this setup before so it sounded like just a standard locker axle.
That would be if you lunch-boxed the front Dana 30. In 2wd it would be a slip-type because the axle is not powered in 2wd. When you engage the CAD to put the axle in 4wd mode, it becomes powered and the lunch-box kicks in.

Someone correct me if I'm wrong but I believe that's why you have heard it said like that. If you lunch-box the rear, it will be full-time lunch-box, no way to disengage it. That is why most use a selectable-locker (cable or air) in the rear.
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Old 05-02-2014, 02:45 PM   #6
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That would be if you lunch-boxed the front Dana 30. In 2wd it would be a slip-type because the axle is not powered in 2wd. When you engage the CAD to put the axle in 4wd mode, it becomes powered and the lunch-box kicks in.

Someone correct me if I'm wrong but I believe that's why you have heard it said like that. If you lunch-box the rear, it will be full-time lunch-box, no way to disengage it. That is why most use a selectable-locker (cable or air) in the rear.
I believe that is correct. I put xj full axle shafts with the bigger u-joints in mine so I hear my locker on the road.
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Old 05-02-2014, 02:54 PM   #7
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ive ran two in the past, a powertrax and lock-rite. the powertrax was in an automatic car that was a DD and saw weekend passes at the dragstrip. the lock-rite was in a manual trans fullsize with 35's that was also a DD and saw weekend trail use. the powetrax you never knew was there except turning in tight spots. the lock-rite you definetly knew was there (could also be because the manual trans) and had to adjust my driving style slightly (mostly when turning off a main road and not quite coasting but not exactly accelerating.) offroad the lock-rite was perfect and always locked in. ive considered a lunch box for my jk if somebody ever makes one for the jk d44, but since i need to regear will be going full case locker
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Old 05-03-2014, 07:55 PM   #8
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Thanks for the input. I'm not sure what I'm going to do yet. It was the daily driver but now it's just a spare car to play with.
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Old 05-04-2014, 09:46 PM   #9
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Dollar for dollar, lunch box lockers are the best value to improve your off road capability. I think I paid 210 for my lockrite and 250 for someone to install in the front axle. If you put one in the rear, be prepared to change how you drive it. On road you basically have to coast around corners so the over-ride feature can function. Think it'll be easy to coast around corners? Try going up a circular on ramp. It'll pop and bind like crazy and your tires will probably chirp and bark around the corner. If you can with that in the rear axle, go for it. In the front, I highly recommend one.
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Old 05-04-2014, 09:49 PM   #10
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Dollar for dollar, lunch box lockers are the best value to improve your off road capability. I think I paid 210 for my lockrite and 250 for someone to install in the front axle. If you put one in the rear, be prepared to change how you drive it. On road you basically have to coast around corners so the over-ride feature can function. Think it'll be easy to coast around corners? Try going up a circular on ramp. It'll pop and bind like crazy and your tires will probably chirp and bark around the corner. If you can with that in the rear axle, go for it. In the front, I highly recommend one.
$250 for install?! You got robbed big time!
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Old 05-06-2014, 10:08 PM   #11
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I used a richmond lock-rite locker in mine. Install only took a few hours and it works great.
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Old 05-07-2014, 08:44 AM   #12
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Do those make that clicking sound?
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Old 05-07-2014, 11:15 AM   #13
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Do those make that clicking sound?
All lunch box lockers do. Some are louder then others and I'd say lockrite are the loudest followed by Spartan. Aussie makes some quiter ones, and I put a RMS duratrax in my cherokee and it's about thev same as the aussie

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