Eaton Detroit Locker Dana 44 30 Spline 3.73 Down Automatic Locker - 187SL16D |

Eaton Detroit Locker Dana 44 30 Spline 3.73 Down Automatic Locker - 187SL16D

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  • Eaton | Part Number: EAT187SL16D
  • Popular Axle Manufacture:Dana
  • Axle Location:Rear|Front
  • Axle Type:Dana 44
  • Fitment:Universal Fit
  • Axle Spline:30 Splines
  • Differential Type:Automatic Locker


The Detroit Locker maximizes traction by delivering 100% of the torque to both drive wheels. It is engineered to keep both wheels in a constant drive mode, and has the ability to automatically allow wheel speed differentiation when required. No other performance differential has the reputation for delivering traction in mud, snow, rocks and on the track.

Customer Reviews

5.0 5.0
2 Customer ratings
5.0 Soft-Lock Detroit Locker

Being an older "Gear Head" I have had my time with the old style lockers and have to say that the new "Soft-Lock" Detroit locker really is an improvement over the old "Hard" or "C" locker,(depending on how old you are). It's much quieter than the old styles and very rarely does it bang like the old ones either. Now realizing that this diff does not have limited slip, I would not recommend it for the rookie with a short wheel base vehicle but for the driver that knows exactly what this thing does, it's absolutely perfect. My 2007 JK Jeep (2 door) is my daily driver and once I reprogrammed my brain to compensate for the locker, it's done everything that I want it to do. That over-saturated farm field like ground that you get out in the woods, (way slimier than mud bogging) with the Detroit, it just plows right on through without the herky-jerk that you get with a posi in that environment. This is the way to go for the driver who wants to go anywhere, any time. If you have never driven one before or any differential that is welded solid or a spool, do talk it over with someone who has. They do have their handling differences which if you're not ready for it, it will bite you. Do your research and find out what is best for you.

from Santa Rosa |
5.0 Great

I put this in my jeeps Dana 44 hd. Couldnt be better. Predictable on road and killer off road. I'd buy it again for sure!

from Hernando, ms |



Question & Answers

3 Answered questions

Q: Hello, I am looking for: EAT187SL16D x 1 Do you have one in stock? How much shipping would cost to Torrance, CA 90503? Thank you Answer this question

A: Sir, we do have it in stock and can be shipped, we are running a promotion on free shipping on this part. Thanks for your question.

Answered by RK on 03/27/2015

Q: I have a 1995 f150 5.8 dana44 TTB front end with factory limited slip with 3.55 all stock I want to put 4.56's do I need to buy this or can I use my factory limited slip? Some say I have to get a different differential an this would be the one if I have to buy one but if I can keep my factory one it would be great. Just let me know I'm all confused Answer this question

A: Hello Crmpstr, The Detroit Locker Dana 44 30 Spline 3.73 Down Automatic Locker will work with your factory gear ratio 3.55 but will not work if you are looking at changing to a 4.56 ratio.

Answered by Dave on 01/16/2015


A: Hello Skip, For the Detroit Locker Dana 44 30 Spline 3.73 Down Automatic Locker we reccomend an 85/140 standard mineral based gear oil. There are no addatives needed with this locker. We sell the Lucas brand on our site.

Answered by RK on 10/25/2014


The Eaton Corporation has enjoyed over a century of innovation and is in the business of powering Jeeps with a top-rate lineup of lockers, open differentials and limited slips. Traction performance is critical while jeeping and we carry Eaton components for upgrading vehicle traction. Compatible with different axle splines and various gears, these parts are often rebuildable and are top performers on and off-road. Eaton's rich tradition of engineering innovative, dependable products extends to off-road parts and accessories for 4x4s and they have evolved to become the industry standard in differentials, lockers and limited slips. Shop Eaton Now