Maybe as an option? It comes standard with FX4.

 

The 36 gallon tank is standard on all 4x4s. The biggest thing IMO to really consider is simply the locker vs. a limited slip because in the FX4 when 4x4 and the locker aren't engaged, it's an open diff which isn't really a good thing. For most people a limited slip would probably be the better option. However, if you're planning on waiting for a 2011 then you can get a limited slip with a locker on any truck basically if you add the offroad package.

 

So you can get a limited slip with a locker on the 2011? That would be nice. As you state... the locker is actually a real pain. Normal on-road driving when wet or even light snow or gravel... makes me really miss a normal limited-slip setup.

 

no such animal as a limited slip locker.

 

Dangit, I knew it was only a dream.

 

According to the 2011 F150 Order Guide it's an option unless it's a mistake or I somehow read it wrong. On page 11 of the order guide, it has two separate columns for Non-Limited Slip and then Limited Slip. Under Limited Slip, it has listed, among others, a 3.73 and also a 3.73 E-Lock. No where under Non-Limited Slip does it list an E-locker.

 

I got an XLT for a few reasons. I don't like painted bumpers on full size trucks. Had them before and they get torn all up (paint wise) if you use the truck in fields. Also, I didn't want a shifter in the middle. The FX4 had some other options I didn't need and didn't want to pay for. I like the interior color options on the FX4 much better however. There were not many FX4's in my area when I traded, but were numerous XLT's, which allowed me to get a mega deal on my XLT. Either way you go, you will like.

The limited slip will serve me just fine since I dont climb rocks and such off road. Not sure if I would truely ever "need" the locking rear diff, however it would be nice. Good luck.

 

if there is.......... it would the first of its kind................ ever. I think its not properly worded.

 

Auburn Gear makes a limited slip that can be electrically locked up too.

http://www.auburngear.com/aftermarke...8-c6f9d7f93179

 

you sir are awsome, I looked for 30 min on the internet and couldnt find this, thanks for the new imput. P.S this thing looks hella complicated, but cool none the less.

Not me: but still good info on how it works, kinda old 2006

The Ected was origionally designed for a computer controlled traction control system. By varying the voltage sent to the locker the computer could vary the ammount of lock needed to stop wheel spin. Selling them to the aftermarket was kind of an after thought, ditch the computer and just send strait 12-14 volts to the locker making it off or on instead of variable. That being said, it is a limited slip with the ability to increase pressure on the clutches via electricity. It is possible to have it slip even when locked if traction overcomes the clutch packs grip. If you check auburns literature its rated for maximum holding torque of like 18K inch pounds, divide that out and its 1500 foot pounds before it breaks loose and is slipping. Sounds like alot untill you think about the torque you can produce. if your engine put out 100 lbs of torque, times the first gear in the tranny (call it 4:1), times the low range (call it 2:1, I like simple numbers), times the diff gears (again, call it 4:1), and your talking 1600 foot lbs of torque. Now that gets divided by the wheels since torque is measured by resistance, so if all 4 wheels have equal traction you get 400 ft lbs per wheel, if 2 of them are in the air it goes up to 800 lbs per wheel with traction. So, you can see that exceeding the max lock of the differential is quite possible. Some other points to think about are the clutch discs themselves, just like the trac lock that jeep offers standard as a limited slip, the clutch discs will wear, and require a friction modifier in the diff fluid for proper opeation. We all know about the trac record of jeeps trash lock limited slips, and how they rapidly turn into unlimited slips when the clutches go bad, so I couldn't see paying big bucks to put in a diff that relied upon clutches to work.

For a mostly street driven vehicle, in need of a good limited slip with the added wow factor of a switch to make it a better limited slip, the ected is probably right on the money. For use in the rocks in an offroad playtoy, I'd pass and get a real locker.