Eaton Detroit Locker GM 10.5 Inch 14 Bolt Automatic Locker - 225S10 |

Eaton Detroit Locker GM 10.5 Inch 14 Bolt Automatic Locker - 225S10

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  • Eaton | Part Number: EAT225S10
  • Popular Axle Manufacture:GM
  • Axle Location:Rear
  • Axle Type:GM 14 Bolt 10.5 Inches
  • 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

4.5 4.5
2 Customer ratings
5.0 What a sweet little surprise

I have a Chev 77 K30 3plus hooked to a 400hp 396 BB. In 4Hi the truck was more or less useless. Against the advise of many "pros" I installed this into my 14 bolt rear diff. Was done in about 2 hrs including beer breaks. Haven't looked back since. Places I go in 2by will blow your mind. Have had it for 3 years now. Keep inspecting unit for wear or chunks, still looks brand new. No visible wear. Hunting, firewood, mud, no fricken problem. Have only heard it unlock once and yes that could be felt as well. Two elk n a moose in the back with both tires chained up spinning up hill for a mile in 2.5 feet of snow at -30c, nay sayers, YOU WERE WRONG THIS LOCKER ROCKS. I cant find anything bad to say, if there was, I would comment on it, buy it for your open 14bolt Chev, cant go wrong for cheap traction upgrade..

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Question & Answers

1 Answered question

Q: what number in the vin code tells me which rearend I have? Or how do I visually tell just by markings on a rearend? Answer this question

A: Damian- Thanks for the question. If you have a 6 bolt pinion support you have a 10.5" If you have a Diesel truck you have the 11.5" If you have a light duty 2500 or a 1500HD you may have the 9.5"

Answered by DP on 10/26/2013


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