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Your cart is empty.Increase the traction capability of your Dana 30 front diff with the Spartan Helical LSD from USA Standard Gear's Spartan Locker brand. This helical gear design provides years of maintenance-free service. When wheel slippage occurs, its pre-loaded worm gears funnel more power to the tire with the best traction. This 10-pinion USA Standard Gear design has a strength advantage over an equivalently sized 6-pinion or 8-pinion unit because it has more points of contact and more surface contact area to deliver optimal load distribution.Compared to other types of limited slip differentials or positraction units, the Spartan Helical LSD provides smoother engagement, quieter operation, and requires no maintenance. Built tough, the Spartan Helical LSD is a fully assembled unit featuring a forged 8620 chromoly case and stout 8620 chromoly alloy internals for superior durability. Whether you’re facing mud, loose gravel, or steep inclines on the trail or slippery snow or rain on the road, the Spartan Helical LSD will ensure you have unrivalled traction and supreme confidence in your vehicle.USA Standard Gear sets the standard for quality OE replacement parts at affordable pricing. USA Standards provides the widest selection of drivetrain replacement parts, including ring & pinions, axles, Perfect Fit driveshafts, transmission and transfer case components, and installation kits, as well as the Spartan Locker – the toughest lunchbox locker on the market. Designed for the general installer and do-it-yourself customer, USA Standard provides unmatched reliability in replacement drivetrain products.
Billyjo maynard
Reviewed in the United States on February 17, 2025
Great company and products
Jaroslaw
Reviewed in the United States on September 28, 2024
I installed it in a Jeep Wrangler TJ. I adjusted the gear without any problems. I did a test drive without the rear shaft. My right wheel was standing on the concrete. I landed on the wet grass with my left wheel. I looked out of the car at the left wheel and pressed the gas pedal hard. The right wheel squealed, and the left wheel turned exactly the same. Not a bit more.This is an excellent differential and I recommend this purchase
roger slone
Reviewed in the United States on June 9, 2024
The media could not be loaded.
maria encinas
Reviewed in the United States on December 3, 2024
When the jeep was open/open, you had to wait for the BLD to tranfer power. My next upgrade was a detroit locker in the front dana 30. 100% traction everywhere. But, qwirky steering, especially when trying to go fast. No problems in 2wd. So, the detroit popped and I needed a quick solution. I bought and installed the helical with new bearings. Wow! It grips hard! But no torque steer like the locker. Now, BLD plays a big role with the helical and the response is instant. Feels like a locker even with one wheel in the air. You know, just like tapping the brakes. Well, guess what the BLD does for you at the speed of light. FYI, my rear diff is open! Love to put a detroit back there! But, don't want to risk limp mode or driveabilty. So, I am saving for a selectable in the rear dana 44. Anyways, the helical in the front dana 30 is a major upgrade for roughly $350 plus install, which can be done with minimal tools. You will want someone who knows how to shim and get the right clearence. Take your jeep to the next level with this simple upgrade without spending a ton and no driveabilty issues in any weather!
Joy L Barker
Reviewed in the United States on October 1, 2024
I really can’t leave a worthy review at this time. I am in the process of acquiring parts for my axle rebuild.
Amando Arat Meraz Magaña
Reviewed in Mexico on August 14, 2023
Lo puse para mi Cherokee que uso para rutas de dificultad moderada pero en lugares donde solía batallar más cuando pierdes tracción en dos ruedas, te ayuda a seguir avanzando lo suficiente en la mayoría de los casos para volver a tener tracción, solamente aplico el freno para activarlo y hasta ahora me ha funcionado muy bien!
Customer
Reviewed in Canada on June 17, 2023
Cheaper option than an equivalent Eaton, ( trutrac) hope it does the same job
juan m.
Reviewed in Mexico on December 4, 2023
Funciona muy bien, se nota la diferencia a cuando no lo tenía ahora si que maltrato menos la camioneta.
Robert
Reviewed in Canada on April 20, 2023
The product looks great and perhaps it will work great. First I had to barrel sand my new ring gear to make it fit on the locker. The machined edge where the ring gear mates onto was .005 oversized so the ring gear would not fit. The ring gear was to spec at exactly 4.5 inch.Second. When I did get the ring gear on and was tightening the bolts I noticed one of the allenhex bolts missing (see picture). Upon closer inspection the hole was drilled but not countersunk for the allenhex head nor was it treaded. We will see if it hold up with one missing bold. I would give it 5 stars but am disappointed with the quality control of Spartan locker. This will be the last product that I will buy from them. Yukon gear is better.
zachary
Reviewed in the United States on March 14, 2022
Very easy to install, didn't take long to set up the differential, it was very well machined and it is impossible to notice while driving on the road, be it on the highway or on twisty roads. Offroad it definitely gives possi traction and its incredible how smooth the engagement is, would definitely save your shafts vs a full locker not to mention the price. Honestly, after going ahead with it, it's a no-brainer, I run it in a HP30 with 4.88 gears and drive on the road to the trails.
Ronnie johnson
Reviewed in Canada on April 25, 2022
It wasn’t to to hard to install how ever you do need to order shims to properly instal and while your at it you may as well change bearings and seals the down fall of this item is it is a limited slip your wheels will lock but you need to punch the gas pedal hard for it to engage in snow or it will not engage and if you ever did 4wheel drive in snow you know that slow turning wheels a better then a spinning wheel so for that matter I do not like this product at all so don’t believe everything they say on the spartan video for the spartan lsd helical….. I paid 483$ and I’m not satisfied at all in this model not saying spartan is no good cause I reorder the spartan ld
Robert
Reviewed in the United States on March 8, 2021
This Spartan Locker is awesome. Super quiet, a breeze to install, as long as you know what you’re doing, and works flawlessly. I would highly recommend this unit, especially for the price. It’s every bit as good as an Eaton Detroit Locker but for less, and it may be a better design. I love it! I installed this along with new 4.56 gearing, and man my XJ can now go anywhere! Just buy it!
RSV
Reviewed in the United States on December 1, 2021
It took me a week of evenings to get my gears set up (results may vary). Paired with the new 4.88s this is one of the best upgrades I have added to my lil YJ. Smooth, quiet and unnoticeable under normal driving conditions, even in 4wd. No pulling or hard steering, but definitely improves traction. Proper brake input and it basically turns into a locker, way cool. Probably not good for rock crawling, but I don't do that. This helical LSD has helped transform my Jeep into a VERY capable off road rig.
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