Eaton Detroit TrueTrac Chrysler 9.25 Inch Rear Differential - 913A368 |

Eaton Detroit TrueTrac Chrysler 9.25 Inch Rear Differential - 913A368

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  • Eaton | Part Number: EAT913A368
  • Popular Axle Manufacture:Chrysler
  • Axle Location:Rear
  • Axle Type:Chrysler 9.25 Inches
  • Fitment:Universal Fit
  • Axle Spline:31 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

5.0 5.0
6 Customer ratings
5.0 True Trac in 2015 Ram

Yes it can be done, ask the boys in Tigard Or. They're good!

from Oregon |
5.0 Great in all aspects

About 3 years ago, I rebuilt the rear end on my 2006 Dodge Ram 1500 SLT 4.7L with the C9.25 rear end. I did this as a result of plans to change gears from stock 3.55 to 4.10, and I installed this into a truck that his my daily driver as well as an off-road toy. When I installed this, I used the G2 4.10 gears and did not touch the axles, against all warnings from other mechanic friends in the area I lived in. Three years later, ignoring that warning has finally caught up to me. After three years of heavy off-road, mud, and rock climbing abuse, one of the OEM axles did a clean spin to oblivion. When I popped the diff cover off, there was debris and muddy grease in the housing, but the TrueTrac is still looking as new as ever. I would definitely have to say, the absolute greatest feature is the automatic torque biasing. Many times I made it up a mountian or through a mud hole in only 2WD. If you have existing knowledge of assembling rear ends and order the gear/pinion install as well as the install kit for this bad boy, its not too hard and can be done in a day. It is worth every dollar spent. Just be sure to not cut corners and bring your axles up to par.

from Kingsland GA/Fairfield CA |
5.0 Great diff

I finally got some snow so I could see if the TrueTrac works - and it works great. With the OEM open diff in my Dodge Ram 1500, the slightest snow or sand would make one wheel spin and I went nowhere. Now, I just keep moving. Still need 4x4 for deep or steep stuff. I'm not a hard-core off roader, so the TrueTrac is perfect for me.

from Evergreen, CO |
5.0 No more one wheel peel!!

I got my Hemi Ram second hand. Why any dealer lets a pickup get ordered without some kind of limited slip in the North-East is insane!! The factory option at time of order is $70!! If you have a truck without a locker and want one, this is the way to go unless you are a super serious off-roader! Better locking than any clutch type unit I ever owned, and smoother and quieter that a "bang-go" true locker. The best of both worlds!! In my case, this cost 2/3 of what the factory clutch type part would have cost. I have pulled a few boats out on a dirt ramp in 2WD that I used to use 4WD-Low on. Just Awesome!

from Finger Lakes, NY |
5.0 Great Product, Works Perfectly

This unit compared to the limited slip from the factory is a significant improvement in quality and performance. The stock unit, when used with bigger tires performs at a 2 on a scale of ten. The Detroit Locker is a big 10.

from PA |



Question & Answers

9 Answered questions

Q: I have a 2010 dodge ram sport 5.7 HDMI 4x4, what's the best product to lock in both back tires? I really don't prefer limited slip, I'd rather have them both locked in at all times. Thank u Answer this question

A: Hello J This would be the unit for you then it will lock both wheels anytime they are going the same speed. So if you are on the throttle even around a corner they will stay locked in. The only time they wouldn't be locked would be going around a corner and you let off the gas they will unlock the one wheel. Thanks

Answered by Rody on 09/14/2015

Q: I have a 2000 Dodge 1500 Sport 9.25 with 3.92 gear ratio will this work? Answer this question

A: Thanks for the inquiry Pauly, the Detroit Locker Chrysler 9.25in. Rear TrueTrac part #EAT913A368 this will fit your vehicle.

Answered by RK on 07/05/2015

Q: I have a 2000 Dodge 1500 Sport 9.25 with 3.92 gear ratio will this work? Answer this question

A: Thanks for the inquiry Pauly, the Detroit Locker Chrysler 9.25in. Rear TrueTrac part # EAT913A368 this will work for your vehicle.

Answered by RK on 07/05/2015

Q: Will this work with a 2014 ram 1500 4x4 with 3.21 gears. Answer this question

A: Hello This unit only works up to the 2010 9.25 axle. We have the Auburn limited slip for the 2011 and newer ZF 9.25 axles. It is part number AUB 5420142 Thanks

Answered by Rody on 05/02/2015

Q: Hi, this is the locker that came up for my 2009 dodge ram 1500, just double checking.and will I need any other parts to install this? Thanks Answer this question

A: Jon, Yes correct locker and you will need carrier bearings and races for the install part# TIMJLM704610 @2 and JLM704649 @2 thanks for the question.

Answered by RK on 04/01/2015


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