Schmidty_

I bought my 2012 f150 ecoboost with 3.31 Open rear end... not knowing they even made 42 thousand dollar trucks without a posi rear. Anyway.. I was looking into putting one of these differential carriers in.


1)Detroit trutrac
2)Yukon gear Duragrip
3) Auburn gear


Has anyone installed an aftermarket rear end in any of their trucks? Even if it was an older one? I was leaning towards the Yukon or auburn due to the fact they are clutch pack style instead of detroits worm gear style rear.


Also what spline are the axles on these trucks I have the xlt model I thought it was 31 but I am not sure.

SeeManRun

They often come with 4wd, which if you need traction, is generally better than posi. What do you want it for such that you're willing to swap our your rear end on a relatively new truck?

SeeManRun

I just learned that positraction is simply GM's marketing name for a limited slip differential. Question still stands, what experience is your truck unable to handle that would be fixed by a LSD, and does it offset the cost? Personally, I would be weary of a truck that had a replaced rear end with something non OEM if I was buying a used truck.

strokin7.3

Thats something youre likely to never know when buying unless the seller informs you of it.

The trutrac seems like a good unit. Before I bought the lockers for my bronco I looked pretty heavily into the trutrac and I don't remember ever reading anything bad about it. Plus no clutches to ever wear out or chatter.

Suzuki14258

I have the tru trac in my ranger, it's been used hard and still works like new. You have to set the parking brake to keep both tires turning when you get a wheel off the ground though.

RES4CUE

People run non OEM stuff all the time. In this case his choices are better than OEM.

Schmidty_

agreed.

Schmidty_

I have 4x4, and it works great. But I don't wanna drive around all the time in 4x4. And while driving around in 2wd or should I say 1wd.. lol


The main thing I noticed is that it puts all the power to the passenger side tire all the time and I had uneven wear in my first set of tires due to the fact that it's not putting power to both rear wheels. I rotated every oil change (5k intervals). Also in a little bit of mud, when it's wet out, little ice/snow it will spin/ trac control come on way too easy. Especially when pulling a trailer..


So the main reason, more traction. I was going to see if ford would do the install but I doubt they would use another companies parts... even though they are better quality..

scross86

You are correct to question the spline count. 2011 model year and up are all 34 spline. 2010 and older used the 31 spline. It was in need of and upgrade for strength from what I've read.

Never Satisfied

This is my personal experience, so take it for what it's worth. I personally have not had much luck with the Truetrac. I installed one in a rear axle for a K5 Blazer I had about 10yrs ago and it actually pushed the helical gears right out of the housing. It was about a year old at the time and the K5 only had 33" tires on it. I tried to warranty with Eaton and got nowhere. I was disappointed but chalked it up to a bad unit. Then back in 2012 I decided to give it another try in a custom 9" rear for my Camaro. It ate itself after about 2yrs and maybe 5k miles. Honestly, my thoughts after speaking with a few shops, is that curb weight is big factor in longevity.
I think if it were me, I would go with a clutch style unit such as the Auburn or maybe the Yukon.