Eaton Detroit TrueTrac Dana 35 27 Spline 3.54 Up Rear Differential - 912A569 |

Eaton Detroit TrueTrac Dana 35 27 Spline 3.54 Up Rear Differential - 912A569

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  • Eaton | Part Number: EAT912A569
  • Popular Axle Manufacture:Dana
  • Axle Location:Rear
  • Axle Type:Dana 35
  • Fitment:Universal Fit
  • Axle Spline:27 Splines
  • Differential Type:Limited Slip Assembly


The Detroit TrueTrac Limited Slip is an all gear driven clutchless differential. The TrueTrac will automatically provide smooth transfer of power from the slipping wheel to the non slipping wheel to help you out of a jam. With no clutches to wear out, you will have a dependable long lasting Limited Slip differential.

Customer Reviews

4.8 4.8
5 Customer ratings
5.0 Truetrac dana 35

great intermediate option for the weekend warrior who doesn't want a true locker or the price. Works great goes almost unnoticeable until you need it

from mass |
4.0 works great

I've been running these in both ends of my jeep for about two months now, the increase in traction is amazing. they are not full lockers but they do a very good job at what they are supposed to do I have not had any problems on or off road with them. they have taken me through deep snow and over icy roads in 2wd when even the 4x4s where havin a hard the rocks i have next to no wheel spin trying to climb obsticals that used to not be able to climb. if you are not building a dedicated trail machine and you want to avoid the cost of selectable lockers and the handleing quirks of auto lockers this is what you want

from Ft. Riley, KS Cheyenne, WY |
5.0 I thinking of buying for the front now

rock crawling grrrrrreat havent found one yet

from chaparral , NM. |
5.0 Works great!

Once you get in the rough! You'll see why this item was a great purchase.

from Woodland hills, CA. |
5.0 Unreal

Had a lot of lockers. This one is the best.

from Temecula Ca. |



Question & Answers

7 Answered questions

Q: D you have Dana 35 Eaton Lockers with 31 spline Answer this question

A: The only Dana 35 lockers they have is for 27 spline.

Answered by Kelly from Ohio on 10/05/2020

Q: Will the true tracker reduce my speed in my jeep in any way. Will I still be able operate at hi way speed? Answer this question

A: Sir, A locker will never affect the speed or your speedometer unless you change tire size then you will need to change your gears to accommodate the larger radius of a tire. Hope this helps thanks for your question.

Answered by RK on 03/31/2015

Q: I have a 2006 Tacoma (access cab), 4 cyl, AT, 2WD. Will this fit my vehicle or is there anything available for it? Answer this question

A: Hello Yes there is a few different units you can get. Here are a few links to the units for your truck.

Answered by Rody on 03/16/2015

Q: I have a 2000 jeep tj, does this product come in 8 bolt configuration. Answer this question

A: Hello If your Jeep has the Dana 35 this is the correct unit. The pictures from Eaton / Detroit are not always correct.

Answered by Rody on 12/19/2014

Q: i will be installing this on a 1998 f150 4.6l 2wd with a 8.8 inch rear end with 3.55 gears will this be able to do light off roading and will i still be able to to burn outs with my buddies Answer this question

A: Hello The unit you have listed is for the Jeeps with a Dana 35 axle. The one you need for the Ford 8.8 is EAT 187c145a Yes it will hold up fine to doing burn outs and hard off-road driving.

Answered by Rody on 11/13/2014


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