no problems here im at 3500 mi

but did get a new door panel, their was a mark on it when i bought it, so they fixed

 

Was it turing both tires? or was it a one tire fryer Reason I ask is there is a small debate going on on another forum about whether or not the E-locker is an open diff or lsd when not engaged. I assume that if it was burning both tires, there is a pretty good chance that it is not an open diff.

 

4200 miles since middle of January. 0 problems so far (knocking on wooden desk).

This story should also further put to rest any questions about whether or not the traction control can be disabled.

 

o yeah, i get a both wheels smokin. mine is ls axle. opens would only spin one wheel. the ls has the clutches in it to lock it up as best as it can but still lets it slip to make turns without tearing anything up. the elock can only be engaged in 4wd.

i was posting in the in that forum about the elock and ls. some guys just dont understand the difference between an open and ls diffs. the elock doesnt not come into play until the truck is in 4wd and the lock is engaged.

 

and yes the tc can be disabled. i was at the beach this weekend and decided to bury the *** end of the truck down in the sand. turned off the traction control and down she went. both rear tires burried in the sand.
clicked it into 4wd when i was ready to leave and pulled right out.

 

does no one read the owners manel that the elocker is a open diff ?

 

That's basically how mine worked in the snow. I just wanted someone else to have similar results to confirm what I had said earlier....that the T/C can be turned off using the button on the dash.

 

dont know what owners manual you have but mine is a limited slip. if you really want to know the truth then take the cover off your rear end and you will see the clutch packs in the rear diff. thats the limited slip clutches that engaged when you have wheel slip. all an open has is the set of spider gears and the other typical stuff in there. no clutches.
trust me i have had both on different trucks. i know what im talking about. the fx4's only option is the 3.73 limited slip axle with the elock, which can only be engaged in 4wd.

 

get out your 2009 f150 owners guide turn to page 277 and read the bottom right coner

 

277 refers to ESC. 281 refers to the locking diff. it says nothing about open or limited slip. it does say that the eld functions like a standard axle when unlocked. but the limited slip section says that a lsd functions like a standard axle too.

Oh and I'm pretty sure I was doing two wheel snow burnouts a few months ago.

 

well i looked up the make of the elocker which is gkn drivelines and on fords web site that its say nothing about a ls in the 09 fx4 with the elocker which im pretty sure that ford would make it known but gkn does say it its locker would work with a ls

but for a fact on my truck i know its not a ls, is when i paint all my brake calibers on my truck and spun the rear wheels to find it a open diff

and also think of the added cost to have a ls and a locker in the same axle doesn't make sence

and a final test jack up your truck rear tires and put it in gear and hit the gas, a limit slip rear will spin the same way and a open will spin different ways

or turn off the tcs while having one tire on pavement one in grass

also a none ls axle can still do a two wheel burn out most of the time as what my 05 ranger would do

 

So an open diff can do a two wheel burnout? How? If it can then what is the point of an lsd, or locker for that matter. Also if my truck can do a two wheel burnout then what would "putting my truck on jackstands and hitting the gas" prove?

I put my two front wheels up against the curb while there was snow on the ground. I turned off the traction control and floored it. I had rooster tails from both sides. If that isn't a limited slip then what is? Unless my locker is stuck on locked.

 

Technically, an open diff can spin both tires simultaneously. This should occur when the amount of traction at both rear tires is equal. In practice, however, this is almost never the case. But, I have seen some open diff trucks spin both tires, usually on loose surfaces like snow and gravel. Usually, this would only last a second before all the power transferred to one tire.

 

The max tow package requires a 3.73 Limited Slip, and is an option on an FX4 without changing the diff. That says to me that the FX4 only comes with a 3.73LS with e-locker.

Silver05fx4 if your 09 FX4 has an open diff then you should take your truck back to your dealer and ask for a real FX4.

In a safe location at a dead stop turn off traction control, turn the wheel to lock (left or right your choice), place right foot firmly on the long skinny pedal and see what happens. It the truck drives in a circle you have an open diff, if it kicks the rear out and does some nice donuts you have a LS, though I have seen open diffs start to do a donut but not really kick the rear around. Only do this at your own risk if you wreck your truck you can only blame yourself.

 

Yes.

Already had a warranty repair on the reverse sensing system. They had to replace the module.

Also, not happy about the 1st to 2nd gear shift on start up. Although, not a problem yet, it is a concerning.