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Old 03-10-2011, 06:04 PM   #1
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Gears and lockers

So I am thinking about re-gearing from 3.21 to 4.88 (not really sure why jeep thought 3.21 was a good ratio for the wrangler). Here is my question. Since I am going to have the pumpkins opened up should I do lockers at the same time? How often do you daily drivers user your lockers? Any thoughts on the locker types? I am looking at the e-locker by eaton but I am learning they are on weak side. This forum has been great to bounce ideas around. I just got my teraflex 2.5 lift done and I am so glad I didn't get the procomp lift. Thanks to the feedback from this forum. Once again thanks in advance for your thoughts.

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Old 03-10-2011, 06:51 PM   #2
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Doing it while you have it apart will save on labor cost for sure. As for a FRONT locker I'm running a Eaton E-locker with 5:13's and have had zero issues, matter of fact for all I have heard and read the Eaton E-locker for a D-30 is the best electric locker on the market and it also uses a 4 pin locking system, which is equal to a ARB air series. What makes the big difference is when you make the change to a D44 , the Eaton drops to a 2 pin system which does indeed make it weaker..

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Old 03-10-2011, 06:56 PM   #3
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I would not lock a D30. I would lock just the rear D44 first.
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Old 03-10-2011, 07:01 PM   #4
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I would not lock a D30. I would lock just the rear D44 first.

????Elaborate....There are literally an uncountalbe number of Locked D30's under jeeps without issues...
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Old 03-10-2011, 07:18 PM   #5
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The Dana 30 is a decent axle and it doesn't get the respect it deserves, idk if you read petersons 4wheel and offroad or not but on last years ultimate adventure there were quite a few guys running locked Dana 30s with no problems! I'm am currently looking at a locker for my D30 right now, I'm prolly gonna go with an Aussie locker, I do see snow but I rarely need to use 4x4 unless it is just to get moving and then I take it out, if you don't see any snow then I would think about an auto locker like the Aussie. Just my 2 cents.
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Old 03-10-2011, 10:18 PM   #6
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????Elaborate....There are literally an uncountalbe number of Locked D30's under jeeps without issues...
I'm not sure I buy that. Last time my club was out one of the rigs blew a D30. The spider gear apart and punched two holes in the pumpkin that looked like bullet holes.

Lockers can put a lot of stress of stress on the spider gear.

When climbing, which is IME the most common time for locking, most of the weight and most of the work is done by the rear diff. If you go out with a rig that has selectable lockers, very little time is spent with the front diff locked. Very difficult to steer fully locked.

If you were to go out with a rig with rear locked in 2 low, it has an easier time than rigs in 4 low with open diffs.

If your going downhill, that's when the front does most of the work but with gravity working in your favor you don't usually need to lock.

The D30 is not a bad diff and axle, but it is a weak point, and as such most likely to break. If you were to add up the costs to strengthen the axle, to add C gussets, sleeves, lockers, shafts; you can buy a Rubi D44 axle, and can almost buy a Prorock D44 axle.

So I would put lockers in my rear D44 and not front D30, because over the life of my rig it is more cost efficient to replace it with a D44 axle, and have a stronger vehicle. I am not sinking any money in my D30; I am saving it all for a new axle.

And any axle can blow. Like I said the last time I was out I saw a D30 blow, but the time before that I saw two front D60s blow doing some crazy hard stuff.
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Old 03-10-2011, 10:25 PM   #7
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Daily drivers never use lockers. Strictly offroad or--perhaps--in very deep snow. If your more of a daily driver type guy, maybe consider installing limited slip diffs instead.
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Old 03-10-2011, 10:45 PM   #8
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Daily drivers never use lockers. Strictly offroad or--perhaps--in very deep snow. If your more of a daily driver type guy, maybe consider installing limited slip diffs instead.
Lockers are trouble on ice.

The Eaton Detroit TrueTrac LSD does not get enough credit.
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Old 03-10-2011, 10:50 PM   #9
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Reverse cut dana 30 ring and pinion is close to the same strength as a 44. Axle shafts are the week link.
Eaton elec lockers have no warranty if you run any tire over the stock size. If you run in snow you should not run a limited slip Differential for you wont be able to keep from slidding sidways if you get in a spot with slant to the road.
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Old 03-11-2011, 12:17 AM   #10
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Quote:
Originally Posted by djyj
Reverse cut dana 30 ring and pinion is close to the same strength as a 44. Axle shafts are the week link.
Eaton elec lockers have no warranty if you run any tire over the stock size. If you run in snow you should not run a limited slip Differential for you wont be able to keep from slidding sidways if you get in a spot with slant to the road.
Reverse cut gears are only for HP axles. As far as the limited slip not bein a good idea in the snow...this is Not right. LSD in the snow and ice is fine. There are plenty of jeeps that come STOCK with LSD. What I have heard that is not so good for lots of snow and ice driving are auto lockers...but this is a whole different concept than LSD.
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Old 03-11-2011, 07:41 AM   #11
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If you run in snow you should not run a limited slip Differential for you wont be able to keep from slidding sidways if you get in a spot with slant to the road.
Yeah that's not right. The advanced LSD system is why subarus do so well in the snow. It's also why jeep uses its traction control system to approximate an LSD on jeeps that don't come with an LSD stock.

Your options are open, LSD, or lockers. LSD is the best all around option. It transfers torque from the wheels that slip to the wheels that grip. If you spend a lot of time on the trails and rock crawling then lockers are probably worth it, but even then an LSD would beat an open, and your sacrificing the superior road drivability of an LSD.
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Old 03-11-2011, 10:57 AM   #12
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This is why I love this forum! Thank you everyone! Back to the Internet for more reading and research.

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