I did a search and I've probably missed it, so pardon me if this is a repeat.

With the "locker" diff, when not locked is it "open" or "limited slip"?

 

Should be open, right?

 

Not 100% sure but pretty darn sure it is open. I don't think there is enough room for LS and locking in the same area.

 

it is a open diff which is the one thing i don't like, because the locker can only be turned on in 4x4 and only works between 0-40km i think i would have liked a limited slip rear end with locker function in the FX4.

 

I have been under the impression it is limited slip 2wd/4wd with selectable locking in 4wd

http://www.gkndriveline.com/drivelin...ff-locker.html

 

it can be but that is not the case with the F150. there are no clutch packs in the ELD on the FX4.

 

oh well, still prefer to have the locker over limited slip anyway.

 

LIMITED-SLIP AXLE (IF EQUIPPED)
This axle provides added traction on slippery surfaces, particularly when
one wheel is on a poor traction surface. "Under normal conditions, the
Limited-slip axle functions like a standard rear axle". The axle may
exhibit a slight noise or vibration in tight turns with low vehicle speed.
This is normal behavior and indicates the axle is working.



Electronic locking differential (ELD) axle (if equipped)
This axle provides added traction on slippery and/or off road surfaces,
particularly when one wheel is on a poor traction surface. In normal
driving conditions the rear axle function as a standard axle. The ELD
may be locked or unlocked by the vehicle operator. Refer to Four- wheel

drive (4WD) operation section in this chapter for further detail on ELD
function and usage. "When the axle is unlocked it will function like a
standard rear axle". When the axle is locked it will not allow the rear
wheels to rotate at different speeds when turning. The ELD axle is not
recommended for use on good traction surfaces such as dry pavement.
Doing so may result in abnormal driving behavior while cornering and
excessive tire wear.

 

Lovely. Sounds like the same garbage GM has in its trucks. I'll stick with limited slip.

 

Nah, GM has mechanical locker. Very different. I'll take a e-locker over limited slip any day on the trails. On the road they all act reasonable the same.

 

GM's locker is mechanically and electrically actuated.

 

User manual sounds wrong to me..who drives over 56mph in 4x4 low?? In 4x4 high the ELD does not work if going over 25mph but it works upto 62mph in 4x4 low.........no way......they must have this backwards. Anyone try the locker much yet?

Electronic locking differential (ELD) (if equipped)
The electronic locking differential (ELD) is a device housed in the rear
axle which allows both rear wheels to turn at the same speed. The ELD
can provide additional traction should the vehicle become stuck. The
ELD is electronically activated by the driver and can be shifted on the
fly. It is intended for use in mud, rocks, sand, or any off-road condition
where maximum traction is needed. It is not intended for use on dry
pavement.
The ELD is affected by the following conditions:
The 4WD control must be in either 4H (4X4 High) or 4L (4X4 Low)
mode.
The ELD will not engage if the vehicle speed is above 20 mph
(30 km/h) in 4X4 High or 56 mph (90 km/h) in 4X4 Low.
In 4H (4X4 High), the ELD will disengage at speeds above 25 mph
(40 km/h) and will automatically reengage at speeds below 20 mph
(30 km/h).
In 4L (4X4 Low), the ELD will disengage at speeds above 62 mph
(100 km/h) and will automatically reengage at speeds below 56 mph
(90 km/h).

 

I was pretty sure that it was a limited slip when unlocked. I played with my fx4 a bit when there was still snow and it acted like a limited slip. I saw no reason to even engage the locker. (This was with the traction control and trailor sway off) Maybe I'm wrong. I'll test it on the way to work tomorrow.

 

Who the heck is going over 50mph in 4low anyways?!?!

 

I believe that the speedometer sensor is read from the transmission, not the read axle. since the transfer case is what gears down the low range, that make the speedo read wrong. 56MPH on the speedo is something like 20 on the read axle.