--- product_id: 16347465 title: "USA Standard Gear Spartan Locker for Dana 30 Differential 27 Spline (SL D30-27)" brand: "usa standard gear" price: "€ 442.55" currency: EUR in_stock: true reviews_count: 13 url: https://www.desertcart.hr/products/16347465-usa-standard-gear-spartan-locker-for-dana-30-differential-27 store_origin: HR region: Croatia --- # 27 spline axle fit 100% mechanical lockup 9310 steel strength USA Standard Gear Spartan Locker for Dana 30 Differential 27 Spline (SL D30-27) **Brand:** usa standard gear **Price:** € 442.55 **Availability:** ✅ In Stock ## Summary > 🔒 Lock in power, unlock your off-road edge! ## Quick Answers - **What is this?** USA Standard Gear Spartan Locker for Dana 30 Differential 27 Spline (SL D30-27) by usa standard gear - **How much does it cost?** € 442.55 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/16347465-usa-standard-gear-spartan-locker-for-dana-30-differential-27) ## Best For - usa standard gear enthusiasts ## Why This Product - Trusted usa standard gear brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Precision Fit:** Specifically engineered to fit Dana Spicer 30 with 27 spline axles flawlessly. - • **Unmatched Durability:** Crafted from premium 9310 steel for rock-solid strength and longevity. - • **Effortless Installation:** Innovative spring and pin design eliminates thrust washers for a snap-in setup. - • **Reliable Traction Boost:** Mechanical locker guarantees 100% lockup, powering both wheels under load. - • **Smooth Turning Experience:** Smart ratcheting action reduces tire wear and eases cornering. ## Overview The USA Standard Gear Spartan Locker SL D30-27 is a high-strength mechanical locker designed for Dana 30 differentials with 27 spline axles. Made from durable 9310 steel, it replaces stock gears to deliver reliable 100% lockup traction while maintaining smooth turning and easy installation with its innovative spring and pin design. ## Description The Spartan Locker, by USA Standard Gear, provides reliable traction at a low cost. The Spartan locker's design does not use the thrust washers and has a revolutionary spring and pin design that makes installation a snap!This automatic locker replaces the stock side and pinion gears while utilizing the factory open differential case. A new and stronger center pin fits in oval slots between two inner drivers. Under load the center pin forces the inner drivers outward to engage the outer axle couplers on each side of the case. This provides locked power to both drive wheels, providing greater traction. When turning, one driver is unloaded and the teeth can ratchet across each other creating differential action to reduce tire wear and make turning the vehicle easier. This is one of the most economical lockers on the market today. ## Features - Fits Dana Spicer 30 with 27 spline axles.Material:steel - Made from 9310 steel for added strength - Replaces the spiders in a standard carrier case - Mechanical locker delivers reliable 100% lockup ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B007N3P9DA | | Date First Available | February 13, 2012 | | Is Discontinued By Manufacturer | No | | Item Model Number | SL D30-27 | | Item Weight | 4.64 pounds | | Manufacturer | USA Standard Gear | ## Product Details - **Brand:** USA Standard Gear - **Color:** Black - **Material:** steel - **Recommended Uses For Product:** Automotive - **Special Feature:** Lockable ## Images ![USA Standard Gear Spartan Locker for Dana 30 Differential 27 Spline (SL D30-27) - Image 1](https://m.media-amazon.com/images/I/71zU0mntDQL.jpg) ![USA Standard Gear Spartan Locker for Dana 30 Differential 27 Spline (SL D30-27) - Image 2](https://m.media-amazon.com/images/I/71vD7FfJtoL.jpg) ![USA Standard Gear Spartan Locker for Dana 30 Differential 27 Spline (SL D30-27) - Image 3](https://m.media-amazon.com/images/I/71X8hYvf9yL.jpg) ![USA Standard Gear Spartan Locker for Dana 30 Differential 27 Spline (SL D30-27) - Image 4](https://m.media-amazon.com/images/I/81VOcRyjdKL.jpg) ![USA Standard Gear Spartan Locker for Dana 30 Differential 27 Spline (SL D30-27) - Image 5](https://m.media-amazon.com/images/I/51BPyyfu05L.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: Will these fit my 1995 jeep wrangler yj? should i put them on the front, back, or both?** A: Yes this will work very well in your front High pinion Dana 30. You would need a different locker for the rear Dana 35 in your YJ but i would personally not put an auto locker in it. You will break the dana35 easily. if you really want a locker for the rear - consider swapping the axle for a ford 8.8 or even a dana 44 out of a waggoneer **Q: will this work on my 87 xj?** A: Yes, this locker will work GREAT as long as you have the Dana 44 Rearend.Let me know if you have any other questions.Thanks,BRYDON641-751-8060staticz2229@gmail.com **Q: Will this fit my 2007 Jeep Unlimited with Dana 44 rear axle with no additional shims or parts?** A: Yes this should fit in your 44 using the same shims you already have in there. This will pop considerably on pavement in your rear diff. I have it in my front and it behaves like an open diff when in 2wd. It locks up in 4wd and becomes stiffer to steer but climbs rocks much better. I have the D-30 front. **Q: Does this locker make noise on tight turns?** A: Yes, all lunch box type lockers make a clicking noise on turns. On slow tight turns you may occasionally hear and feel a loud banging. I have this locker in my front D30 and while turning into a parking space I turn slowly and don't accelerate while doing this type of turning. As others have said, it's normal. ## Customer Reviews ### ⭐⭐⭐⭐⭐ NIce auto locker but some caveats *by on Reviewed in the United States January 6, 2022* This is a very nice locker. it works very well and installs easily with hand tools and no special tools, knowledge or equipment. (you just need a torque wrench, sockets a punch for the roll pin)Offroad this thing is amazing and will pull your jeep over things that were impossible before.However on-road this is VERY sensitive to tire pressure. Make sure you rotate your tires often and monitor tire pressure frequently. even 1-2 PSI is enough for it to act squirrely. This is especially noticeable for the first 1000 miles. During break in even in 2wd with the locker in in a front differential, It can lock up and make the jeep hard to handle. After it gets worn in - it works like a dream but if you put it in right before winter you will struggle. During break in the unlocks are LOUD -almost like a bang. You will get looks in parking lots where people think you broke something. The steering is much tighter in 4wd then before you put this locker in and it will not turn as tightly in 4wd. Offroad in 4lo with this in the front dana 30 you will have to make more multi point turns (or get a terra 2w low kit for your np231 so you can shift in and out of 2w/4w low on the fly to get the front to unlock)The TJ i put this in didn't work right until i ran it through a couple tanks of gas and flat towed it at 65 for about 650 miles - then it was good to go. In the YJ i put this in it wasn't "right" with the world until just after 1000 milesThis does have some negative driving characteristics in 4wd as well. If it's icy you need to be very careful - if you have this in the front axle it will understeer and the locker will not always differentiate because it needs that friction with the road to do so. you will find yourself putting more and more wheel into a turn and then when it finally unlocks it will get squirrely. It will also understeer and is much more likely to loose lateral control in the ice. If you put one of these In the rear it will torque steer (pushing you in a straight line) for as long as you are on the gas. If you don't watch it closely you WILL do unintentional lane changes or donuts when its icy out on the road. Do not just toss the keys to your buddy who doesn't know how to drive an auto locker in in a light vehicle when its shitty out.It will take some time to learn to drive it, you drive allot with your foot - you learn to let off around curves, lane changes etc. Make sure to give yourself some time to adjust to how to drive one of these on the road. Spend some parking lot and back road time with it when its crappy out until you get used to it.When shifting out of 4wd the jeep will have a tendency to not unlock the front axle. If you let it roll with the trans in neutral and turn the wheel back and forth a bit it helps. This gets much much better after you break it it (that first 1000 or so)Finally if you didn't pay attention to the tire size limits - you are much more likely to break axle shafts with larger tires with one of these. Make sure you know out to pound out a u-joint or pull and inner CV . I didn't start breaking things until i went over 33s then it was quite often until i went to 4340 chromoly shafts. The inners are what tend to break on stock shafts and the CV cups blow up on the ZJ shafts.basically take your time, learn to drive it, keep in mind of the limitations and dont judge it until you have that first 1000 or so on it and enjoy the massive off-road advantages ### ⭐⭐⭐⭐⭐ Easy to install Can't tell it's installed *by on Reviewed in the United States April 13, 2022* Overall it's a cheap locker, it works when in 4wd and you can't tell that it's there.In my short time running this locker I like it and this review will change based on my experiences with it. My reason for buying this is my U Joints in the Dana 30 High Pinion on my 1998 Jeep Cherokee decided to sheer off some teeth from binding and this was roughly the same price as a new set of spider gears so I gave this a shot instead of getting a front selectable locker. After I installed this I noticed my jeep now tracks a lot straighter and doesn't have as much wander on the highway. When driving at low speeds, lock to lock, there is no audible ratcheting noise or popping, if you are familiar with Cherokees or any vehicle that has U-Joints in the front with a 50-50 power split as in the NP231 in a Cherokee when in 4wd and turning on pavement the vehicle wants to hop due to the U-Joints binding, this is natural of 4WD; however, when this locker is in 2wd there is no hoping or rubbing but in 4wd there is noticeable rubbing but no hopping due to both tires spinning at the same rate while turning on the pavement. When climbing over obstacles in either 4H or 4L you can tell the front axle locks up due to the reduced throttle needed when climbing rocks or barriers, in off-camber situations when one tire is either at full droop or on lose material and the other tire has full traction both tires spinning at the same rate as a locker should and unlocks as soon as I engage 2WD.Overall it works off-road and I can't tell it's there in my daily driving. I'd recommend this.Installation - went easy cant have any complaints, in my Cherokee I had to pull the diff cover off, 4 bolts to get the carrier out, took the ring gear off by removing the retaining bolts and smacking the ring gear off with a hammer, you use a small punch to remove the retainer pin of your main cross pin to removed your spider gears, make sure all 4 of your thrust washers are removed, you put the spring into the locky key way thing and push it into the locker and insert a little metal pin that they include, you do that 4 times then you put your splined locker gears teethy things into the carrier then insert the two locker bits that have the metal pins, you pull one metal pin out and allow the locker to engage, once engaged you pull the other three out, then roll the center of the carrier to allow the new cross pin to slide through and put a new retainer pin in that is also included. After you punch the pin in you're done installing the locker just reinstall your ring gear with a soft hammer and put the bolts in torque em to spec reinstall into the pumpkin, bolt up your 4 carrier bolts that go in the pumpkin to retain the carrier then throw some gasket maker on the diff cover bolt that down and fill it with fluid and your done, I'd recommend you jack both tires up and or put em on jack stands so no tires are on the ground, when you turn one tire they both should turn in the same direction indicating the locker is indeed locked, to verify proper clearance and that you wont blow up your locker have a buddy bear hug one of your tires and spin the other if she make clicky ratchet esk noises you're good she'll unlock when you turn in 2wd and when you are in 4wd sending power to the front diff she'll lock up.To be noted I am running 8in lift, 35's, long arms, 1 - ton steering, and during the installation of this locker, I replaced my U-Joints, hub bearing, brake pads, and the spider gears due to installing of the locker so my experience may be influenced by the new surrounding parts. ### ⭐⭐⭐⭐⭐ Perfect Fit, Easy to install UPDATED 12/19/2019 *by on Reviewed in the United States September 10, 2019* I installed it into a Dana 30 HP for my 99 XJ. Really easy to install, it took a couple of hours. Perfect fit, follow the instructions to the dot and you will be pleased. For my application, it is really quite, I can barely hear it while turning. BE AWARE, it might lock and unlock (in 2WD) the first 10 miles. I drove my Jeep to a parking lot and drove in circles forward and backward for a few minutes to help lubrication and to brake-in the locker. Then I drive around town for 20 min. Finally, I took it to a fire road to see how the locker works, I put it in 4 low works like a dream. It is a day and night difference. Ever since I have driven the jeep on the freeway for over 200 miles (commuting) and that has helped with lubrication. Now the locker is even quieter. I am planning on replacing the diff fluid in a few more hundred miles to remove any potential debrief from the brake-in process.. Instructions don't say anything about it but I figure gear oil is cheaper so why not. I should be going to Moab and other off-road trails in the following months, I will give an update on how it holds.UPDATE 10/23/2019 - I have run it for about 1000 miles, I have got really quire, even when I am at full lock turning in parking lots. I run Valvoline 80w-90. I have taken it off-road (Moderate trails) and it has performed great. Something that I have noticed is that right after using it on the trails, I would go back into 2WD and it gets way noisy!!!! but after driving for 20 miles it goes back to quite mode!! Loving it! IT WOULD LOCK AND UNLOCK once in a while when backing up and turning, but you can feel it in the steering wheel, it makes a loud pop noise, but if you were the one installing it you won't freak out, you would be able to tell "bad breaking noyses" from the locker loading and unloading lol11/21/2019Took it to rattlesnake trail (moderate to difficult) in Utah. I performed great. I was able to struggle less than my buddies with larger tires and open differentials. I have put around 3k miles on it. The more I drive it the quieter it gets. Now I can only hear it sometimes when turning full-lock on parking lots. It stopped locking-unlocking on his own while driving in 2WD on parking lots and tight places. I will keep you all posted.12/19/2019I have driven it for 4k miles now. I went to Moab last weekend. Wheeling on slick rock was like driving on pavement sometimes. The Locker would bind and lock and unlock pretty hard. So I had to take my turns pretty easy and some times I would cost in neutral. (I have a 5 speed). I still love it, I got me over obstacles way smoother than my buddies with bigger tires. I was able to take the hard lines on trail w/o major issues. The locker has gone quieter after many miles. I can hardly hear it while turning in parking lots. ## Frequently Bought Together - USA Standard Gear Spartan Locker for Dana 30 Differential 27 Spline (SL D30-27) - Dana 30 Differential Cover Gasket D030 - MG21103 Dana 30/44 Front Axle Tube Seal Pair For Jeep Wrangler JK JKU 2007-2018, YJ 1987-1995, TJ 1997-2006, LJ 2004-2006, Cherokee (XJ) 1984-2001, Grand Cherokee (ZJ) 1993-2001 (2PCS Red) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/16347465-usa-standard-gear-spartan-locker-for-dana-30-differential-27](https://www.desertcart.hr/products/16347465-usa-standard-gear-spartan-locker-for-dana-30-differential-27) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-06-19*