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Old 03-06-2012, 08:54 PM   #1
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Lockers on a Rubicon question

When will the lockers work on a Rubicon? At what speeds will they work and not work in 4hi and 4 low I know they have to be manually engaged. The reason I am asking is I am going to get a new JK and dont know if I want a Rubicon or a Sport s / Sahara with track lock with 3.73 gears. Any info would be helpful. I don't plan on any hard core off road use I will be pulling it behind my motor home and going on trail rides out west when I'm retired in about 1 year.

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Old 03-06-2012, 08:57 PM   #2
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Owner's Manual says:

"This feature will only activate when the following conditions
are met:
• Key in ignition, vehicle in 4L (Low) range.
• Vehicle speed should be 10 mph (16 km/h) or less."

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Old 03-06-2012, 09:04 PM   #3
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Im typically a fan of going with the rubi if your only doing mild to moderate trails.. but if your gonna need to run more then 35's and will be breaking stuff in the rocks alot I think you'd be better of with the sport or sahara and taking the difference in price to build up that model..
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Old 03-07-2012, 08:50 AM   #4
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Quote:
Originally Posted by XJ Knight View Post
Im typically a fan of going with the rubi if your only doing mild to moderate trails.. but if your gonna need to run more then 35's and will be breaking stuff in the rocks alot I think you'd be better of with the sport or sahara and taking the difference in price to build up that model..
Disagree here. A sport or sahara in 4wd can handle mild to moderate trails, i know, i have a sport. I even try the hard stuff sometimes, it's all about lines. A Rubi can handle more than moderate since you have the option of locking both axles. Also the Rubi has D44 in the front too, not just the rear. Has a higher spline count in it's axle shafts, electronic sway bar disconnect and stronger ring & pinion gears too. So a Rubicon is out of the box stronger and even more capable than sport and sahara.

I do agree though that for you, a rubicon is too much and it is wiser to get a sport and build it up if you want to make it more capable.

As mentioned the lockers are engaged electronically at your beck and call in 4 lo.

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Old 03-07-2012, 07:03 PM   #5
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Keep in mind that all Wranglers have a brake lock differential. On-road and in mild off-road situations, they will feel very similar to an LSD.

I find LSD's useful only in cars that lack ESP or have a full disable feature. Wranglers have neither (plus a very restrictive ESP) so I kinda think an LSD is a waste of money.
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Old 03-07-2012, 07:06 PM   #6
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Wrong. I live in snowville and use my lockers frequently on this one 40 deg approach to the house that only I use. They will work in 4L and 4H. Just kinda confusing to get them to turn off. They will engage in motion in 4H as I've tested at 10 mph. Not sure about higher than that. And 4L..well, you are going dirt slow so probably at any time.
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Old 03-07-2012, 07:46 PM   #7
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Do I understand you to say the manual is incorrect Rainynite?
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Old 03-07-2012, 08:00 PM   #8
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Quote:
Originally Posted by Rainynite
Wrong. I live in snowville and use my lockers frequently on this one 40 deg approach to the house that only I use. They will work in 4L and 4H. Just kinda confusing to get them to turn off. They will engage in motion in 4H as I've tested at 10 mph. Not sure about higher than that. And 4L..well, you are going dirt slow so probably at any time.
Say what, 4H?

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Old 03-07-2012, 08:15 PM   #9
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Quote:
Originally Posted by sandbaja View Post
Do I understand you to say the manual is incorrect Rainynite?
Uhm. Never read the manual. I just know I can kick in the lockers in 4H or 4L. First push puts the rear lockers on, the second front and rear..
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Old 03-07-2012, 08:19 PM   #10
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Then you have a very unique Wrangler, unless you have used a programmer that allows lockers in 4H.
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Old 03-07-2012, 08:26 PM   #11
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Or the dealer Installed locker mod feature
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Old 03-07-2012, 08:27 PM   #12
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Quote:
Originally Posted by daggo66
Then you have a very unique Wrangler, unless you have used a programmer that allows lockers in 4H.
Is there any significant practical benefit to engaging lockers in 4H?
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Old 03-07-2012, 08:34 PM   #13
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It the same advantage as 4L, having traction in all 4 wheels. Thhe downside is that steering and control can be more difficult. That is why it's only enabled in 4L since it less like;ly you would use that on the street at all.
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Old 03-07-2012, 08:49 PM   #14
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Quote:
Originally Posted by Rainynite View Post
Wrong. I live in snowville and use my lockers frequently on this one 40 deg approach to the house that only I use. They will work in 4L and 4H. Just kinda confusing to get them to turn off. They will engage in motion in 4H as I've tested at 10 mph. Not sure about higher than that. And 4L..well, you are going dirt slow so probably at any time.
I agree with what everyone else has said ... not saying you can't do it on your rig, but that's not factory; maybe you've got a bad Transfer Case Position sensor or something.

BTW - can't do it on my 2012.

Quote:
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Is there any significant practical benefit to engaging lockers in 4H?
"practical" being the operative word ... the answer is "no", not on the type of terrain any stock to moderately modified Jeep will see.

There is 'some' argument for having that ability when hitting deep, muddy, FLAT two track ... like in the jungle on your next expedition to Kalimantan.

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Old 03-07-2012, 08:55 PM   #15
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Beats the hell out of me. I have 2 driveways to the house. One is a 40 deg curved slope only I drive up in the snow and I hit the lockers in 1rst gear and thats in 4H if I think its bad and I just crawl up it. Never been stuck once.
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Old 03-07-2012, 09:06 PM   #16
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there are situations where running your wheels at a higher speed then 4 low allows can be of bennifet.. thus where lockers in 4 high can be nice.. but more then not lockers in 4L is all you need.. that being said the only lockers you can have that only function in 4L is if you have a Rubicon that hasn't been programed to run lockers in 4H or if you have Rainy's Jeep.. His is special
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Old 03-07-2012, 09:12 PM   #17
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I would think lockers in 4Hi on the beaches where I fish would be a nice benefit. Is this correct? I can't engage in 4Hi but have seen the mods to wire this in. Worried about warranty.
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Old 03-07-2012, 09:25 PM   #18
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I go on a snow run in Grayling Michigan every January. If you're lucky there's about a foot of snow on the trails. It's a mix of H1s H2's and H3's.

There's a long stretch where there's long hills down and then back up. It's snow on sand, usually fairly rutted. So you go down at about 30 or 35mph, cross the bottom and back up. Invariably the lockered trucks always seem to make it to the top much easier than the trucks with limited slips and/or traction control. Now that might be that the people who modded their trucks with selectable lockers are probably better drivers with a tad more experience. Lots of situations in snow and mud exist where you need lockers and momentum to start -where you find yourself going fast at the bottom and 5 mph at the top.

Because locking the factory diffs on a Jeep (especially the front), creates a solid axle that doesn't differentiate - this makes it a bit dangerous, costy (warranty complaints because of misuse), and litigious for Jeep - which is probably why you can't lock it in high or above a certain speed.
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Old 03-07-2012, 11:47 PM   #19
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I go on a snow run in Grayling Michigan every January. If you're lucky there's about a foot of snow on the trails. It's a mix of H1s H2's and H3's.

There's a long stretch where there's long hills down and then back up. It's snow on sand, usually fairly rutted. So you go down at about 30 or 35mph, cross the bottom and back up. Invariably the lockered trucks always seem to make it to the top much easier than the trucks with limited slips and/or traction control. Now that might be that the people who modded their trucks with selectable lockers are probably better drivers with a tad more experience. Lots of situations in snow and mud exist where you need lockers and momentum to start -where you find yourself going fast at the bottom and 5 mph at the top.

Because locking the factory diffs on a Jeep (especially the front), creates a solid axle that doesn't differentiate - this makes it a bit dangerous, costy (warranty complaints because of misuse), and litigious for Jeep - which is probably why you can't lock it in high or above a certain speed.
Well, in 4H I haven't experimented but I never locked the rear or both in anything above 10 mph. But it works. Only twice did I need 4L with lockers and I was in a ditch (once intentionally to test and one by accident) in 3 feet of snow. Don't know if I'm a freak case or not.

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