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Dana 44 30 Spline 3.73 Down Automatic Locker

Detroit Locker | Part Number: EAT187SL16D
  • Technical Details

    • For Use With 30 Spline Axles
    • For use With 3.73 And Down Gears
    • Automatic Locking
    • Legendary Traction
    • Unmatched Durability

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.

Installation instructions are in PDF format. You will need Adobe Reader to view these files.
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Axle LocationAxle LocationAxle TypePopular Axle ManufactureDifferential TypeAxle Spline
FrontRearDana 44DanaAutomatic Locker30

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Customer Reviews

Average Customer Review


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Detroit LockerDana 44 30 Spline 3.73 Down Automatic Locker

(based on 2 reviews)

Reviewed by 2 customers

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(2 of 2 customers found this review helpful)


Soft-Lock Detroit Locker

By Iceman

from Santa Rosa

Verified Buyer


  • Superior traction
  • Total dependability


  • Not for Rookies

Best Uses

  • Off Road

Comments about Detroit Locker Dana 44 30 Spline 3.73 Down Automatic 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.

  • Car & Truck:
  • Auto Enthusiast, Competitive Driver, Mechanic, Truck Enthusiast

(2 of 2 customers found this review helpful)



By Rc-jeep

from Hernando, ms

Verified Buyer

Comments about Detroit Locker Dana 44 30 Spline 3.73 Down Automatic Locker:

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!

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Questions & Answers

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1 Question | 1 Answer
Displaying question 1
  • 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
    Asked on 1/13/2015 by Crmpstr from Chester,va

    1 answer



      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 on 1/14/2015 by Dave from Compton
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