Now that I have most of the money in hand, I am shopping around for a good shop to do my re-gearing. The shop that I like the most offers Yukon gears, Detroit, Eaton and Auburn products, so the truck will receive only the finest.

Here is my delima:
I know that I am going with Yukon 4.88's and I want to add an LSD to the rear of the truck, as it is currently open front and rear. As we all know, open differentials just don't cut it off road.

I originally wanted to install a Detroit locker in the rear and an Auburn ECTED in the front, as this would give me the ability to lock in both axles and have some outstanding traction off road; the shop advised against the Detroit locker for a street vehicle stating that it would be too skittish at highway speeds or while driving in the snow, and said that a locker in the front was pretty much asking for axle failure. They advised that I leave the front end open, and add an LSD to the rear. The Detroit true-trac was recommended, as was the Eaton Posi.

I am leaning towards the True-trac since it is a helical ATB, and has no clutches to wear out. I hear it is also slightly more agressive locking that the Auburn or Eaton LSD's, yet still very street-able.

What would f150 online do? Would you do a locker in the rear, and e-locker up front? Would you leave the front open? Crap, at least I know what gears/ratio I am going with.

 

my original route. lunchbox lockers front and rear.

revision # 1 due to failure from the 4.6 MASSIVE power , detroit locker with "no spin" installed in the rear. LOVE IT! still got 40k on my tires and i think i can get another 20 on the road. wont like em offroad tho. no excessive chirping (im blown now so its easy to do)

revision # 2 - will come with time, either the ECTED if the LS isnt too aggressive to be used on the road. or just an selectable open/locked locker up front.

 

I have a selectable up front. Just make sure the steering wheel is straight when you lock it. You wont be able to steer. Your CV's can handle the stress if you are smart about it. On a side note, you get an incredible amount of traction with a locker in the front, I would do it.

As for the rear locker, klitch is a hardcore advocate of this. I would do it now. Just understand that there will be a bit of a learning curve. you are "tuning" your truck for some hardcore off-road capabilities. While the detroit is very streetable and has come a long way, just understand that it will handle a bit differently.

In summary, do both differentials. You wont regret it. If you have any reservations about the ected, PM me. If you are smart about it, you really dont have anything to worry about.