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Yukon Gear Zip Locker for Dana 30 with 27-Spline Axles 3.73 and Higher (07-18 Jeep Wrangler JK)

Item J103777
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$1,182.89 (kit)

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      Video Review & Installation

      This Yukon Gear Zip Locker is for the Dana 30 Axle with 27 Spline Axle Shafts and 3.73 gears or higher in your 2007 to 2018 JK. And this is really going to be for those of you that are looking to add a bunch of traction to your Jeep. This is going to be a fairly involved three out of three wrenches for the installation and that's just talking about the locker not even talking about the air system that's needed to run something like this. But we'll talk a little bit more about the install in just a second.So when you are looking to add some traction to your Jeep you can go anywhere from a limited slip differential to a locker. And when we're talking about lockers like what we have here in front of us, there are really two main types, an automatic locker and a selectable locker. So a limited slip or a posi, they're gonna be a little bit less expensive, they're not really going to give you a true 50/50 split of the power between the two tires that are on that axle because there's a clutch mechanism in there so they can still be a little bit of slippage. The pros to something like that is that they are fairly inexpensive and they're also going to have really good on-road manners. So as they engage and disengage they're not going to cause a lot of noise and they're also not going to cause a lot of excessive tire wear.Now if you are looking for something that's going to give you more traction than that, but it's still automatic you can step up to a locker. Now an automatic locker, in general, will cause a little bit of noise, a little bit of a bang when it locks and unlocks when you are going around corners on the road and because it's either fully locked or fully unlocked, it can cause a little bit of excessive tire wear. So those lockers are going to be for those of you that are doing a lot of off-roading and not as much on-road driving.And then there's something like this, which is a selectable locker. This is going to be a little bit more expensive but you have the ability from the driver seat to turn the locker on or off whenever you want to. So when you're on the road, turn it off, no banging, no tire wear. When you're off-road and you want that traction, turn it on and you have it all the time. So there are some pretty big benefits as you can tell to a selectable locker.The downsides, if you want to call it that, is that these are a little bit more expensive and also more involved to install. As you can see, there are quite a few pieces here that you need to get installed in your Jeep and there are even more than aren't shown here to get something like this to work. So you have your locker itself which is really the carrier mechanism or replaces the carrier mechanism inside the differential. Here this is the block that the air actually comes out of, here is your airline that you need to plumb it to this piece here, it actually goes through the differential. You need to drill and tap the differential in order to accept a fitting for all of that plumbing. Over here you have your actuator, so this receives a 12-volt source and will open and close allowing that pressurized air to get to the differential to either lock or unlock when you turn this off. It also has a switch that is labeled for either front or rear locker depending on where you're installing this locker into. And then all of this stuff needs to get installed with an onboard air system, so you need to have an air source and you need to have that source at the correct pressure for your locker. So again, a lot going on here and all of those parts and pieces together, a lot of installation and they can be a little bit expensive.Aside from all of the other things that you need to add to this, just this kit is also going to be a little bit more expensive than say an automatic locker would be. This is going to come in at right around that $900 mark. So more expensive than an automatic locker, not quite as expensive as some of those other air lockers out there on the market, but still, this isn't going to be an inexpensive modification. But if you're looking for on-demand traction, like we said before, this one is driven by air, but there are some that are fully electronic, so you're still going to have a switch on the dash but you can eliminate the rest of his plumbing and the wires go directly into the differential to turn the locker on and off.Another option would be something that's mechanical where there's actually a cable that goes from the differential into the cabin so that you can pull that cable or push the cable to lock and unlock the differential, so a couple of different choices. A lot of people like air because you might want to have air onboard your vehicle anyway for airing up tires, using air tools in a pinch. So you can give that compressor system double duty by installing an air locker as opposed to one of the other types of selectable lockers.So we said before, this is gonna be a three out of three wrenches for the installation. Pretty much any locker that you install in the Jeep is going to require you to re-setup [SP] the differential. Now there are certain types known as a drop in locker or a lunchbox locker that don't require that. But anything that is going to be the full carrier like this, you are going to have to re-setup the differential. So that means resetting up all of your measurements, your preloads, your backlash, everything that goes into setting up the differential properly you need to do again when you install this locker and that can require some specialty tools and also some specialty knowledge to ensure you're gonna do it in a way that gets you a nice quiet differential and also one that isn't going to have any sort of premature wear. So the vast majority of you are going to take your Jeep to a shop and have them install this differential for you and that is perfectly okay, there is nothing wrong with that.So if you are looking for a great way to add traction on demand an air locker is an excellent option and I would definitely recommend this one from Yukon Gear and you can find it right here at

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • On Demand Air Operation
      • Fits 3.73 and Up Gear Ratios
      • Switches from Open to 100% Locked
      • Forged Case and 8620 Internals
      • Works with a Variety of Air Delivery Systems
      • Assembled in the USA
      • Fits Dana 30, 27 Spline Axles
      • 2 Year Warranty Plus Collateral
      • For 2007-2018 Jeep Wrangler JK Non-Rubicon Models


      Air Powered. Take on aggressive terrain with the Yukon Gear Zip locker for Dana 30 front axles with 3.73 and up gear ratios. This Zip Locker features an air operated design for superior performance by switching from an open carrier to fully locked operation for aggressive traction. Its designed to work with most air delivery systems for on demand locking performance.

      Extreme Construction. This Wrangler air operated locker is proudly assembled in the USA and features a forged case and 8620 alloy steel internals for extreme strength. It comes backed with Yukon's 2 year replacement warranty that will provide up to $2,000 in collateral damages. Some exclusions apply, please see manufacturer warranty for full details.

      Application. This Yukon Gear Zip Locker is designed for use in 27 spline, Dana 30 front axles found on 2007-2018 Jeep Wrangler non-Rubicon JK Unlimited models with 3.73 and up gear ratios. Additional air source required for use.


      Yukon Gear YZLD30-4-27

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      Tech Specs


      Customer Reviews (4)

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        Reviews of Yukon Gear Drivetrain products have an average rating of 4.8 out of 5

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