GKN Locker Info?
Senior Member
Joined: Nov 2008
Posts: 189
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From: socal
so let's all pretend that we know for sure that the 09 with E-locker is an open diff. What would you rather have now.
1) 4x2 with open diff
2) 4x2 with LS diff
3) 4x4 with open diff
4) 4x4 with LS diff
5) 4x4 with Elocker with open diff
I think I would still want the E-locker as that is my best bet for getting unstuck when I'm out in the middle of nowhere with no cell reception or up an icy road in the middle of a blizzard.
1) 4x2 with open diff
2) 4x2 with LS diff
3) 4x4 with open diff
4) 4x4 with LS diff
5) 4x4 with Elocker with open diff
I think I would still want the E-locker as that is my best bet for getting unstuck when I'm out in the middle of nowhere with no cell reception or up an icy road in the middle of a blizzard.
Senior Member
Joined: Nov 2006
Posts: 776
Likes: 1
From: North Central Penna
I am happy to have the open w/e-locker.
Past experiences with LS -
About 10 years ago with my '95, my wife actually rolled my truck, and I attribute that to the LS. She was going up a hill where the road was just wet - then turned to black ice near one of the bends. The LS caused the truck to instantly fish-tail to the point where she could not get it back - ended upside down in the ditch.
Say what you will, but my wife did all the right things as in not touching the throttle or brakes.
I will usually run in 4WD on snow/ice covered roads, but will also catch me by surprise once in a while - then the rear end will instantly kick out from under you. I like the idea of being able to control that better now.
With my '09 if I am not in 4WD when I get a rear end slip - the truck should still track straight - even more so now with the traction control.
Just my opinion from my experiences.
Past experiences with LS -
About 10 years ago with my '95, my wife actually rolled my truck, and I attribute that to the LS. She was going up a hill where the road was just wet - then turned to black ice near one of the bends. The LS caused the truck to instantly fish-tail to the point where she could not get it back - ended upside down in the ditch.
Say what you will, but my wife did all the right things as in not touching the throttle or brakes.
I will usually run in 4WD on snow/ice covered roads, but will also catch me by surprise once in a while - then the rear end will instantly kick out from under you. I like the idea of being able to control that better now.
With my '09 if I am not in 4WD when I get a rear end slip - the truck should still track straight - even more so now with the traction control.
Just my opinion from my experiences.
Senior Member
Joined: Feb 2007
Posts: 593
Likes: 0
From: N.E. Iowa
I am happy with the open w/e-locker as well.
At least I won't have to spend $900 replacing clutch packs like I did in my '04. I really regret fixing that because I ended up trading it in 2 months later.
At least I won't have to spend $900 replacing clutch packs like I did in my '04. I really regret fixing that because I ended up trading it in 2 months later.
Senior Member
Joined: Mar 2009
Posts: 240
Likes: 0
From: Wydaho
Okay I will play along that it is an open diff. I am just puzzled as to why I can spin both rear tires in any situation. I have owned many one-leggers and I have never been able to do this. Is my locker stuck locked? Deano I see that you own an '09 FX4. Is there a chance that you could jump in a mud hole or some wet grass? I am just curious as to why two of us have been able to pull off two wheel burnouts. I know you all say that theoretically an open diff can do this but I personally have never seen it.
Senior Member
Joined: Aug 2008
Posts: 381
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if both wheels spin equally then both will spin, only if one wheel has greater traction then the other will only one wheel will spin.
but to answer your question no i won't because i have nothing to prove. i know exactly how this stuff is built and work. and thats 12+ years working as a tech with Ford.
but to answer your question no i won't because i have nothing to prove. i know exactly how this stuff is built and work. and thats 12+ years working as a tech with Ford.
Senior Member
Joined: Mar 2009
Posts: 240
Likes: 0
From: Wydaho
if both wheels spin equally then both will spin, only if one wheel has greater traction then the other will only one wheel will spin.
but to answer your question no i won't because i have nothing to prove. i know exactly how this stuff is built and work. and thats 12+ years working as a tech with Ford.
but to answer your question no i won't because i have nothing to prove. i know exactly how this stuff is built and work. and thats 12+ years working as a tech with Ford.
And that diagram you posted. Could you point out which pieces are unique to the electronic locker? To me it just looks like a regular open. But I am no mechanic.
Senior Member
Joined: Apr 2001
Posts: 1,115
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From: Lone Star State
The LSD in my 05 F250 was junk. It one wheeled on a flat dirt road and I had to use 4wd to get my trailer going. I tossed it out and installed a Eaton True Track. It has been a much better all gear diff. On the Ford order page it says LSD/locker for the option. I thought the GKN site said their locker could be added to any diff. I want both if they work. A locker is too much for most surfaces. I could use a LSD several times a day turning corners and driving on wet or loose ground. My F250 and old Chevy would one wheel so bad in the rain I couldn't leave some intersections.
Member
Joined: Sep 2008
Posts: 61
Likes: 0
I am backing the OPEN side of the debate. In my 04 Lariat I had the LS and on turns I would power it and I could not get it to cut loose.... however on my FX4 with ELD I will cut loose on powered turns... define powered turns. 10mph steering wheel turned all the way.... wait.. Skinny pedal to the floor...... screeeeech
Junior Member
Joined: Aug 2009
Posts: 2
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Ok this is taken right from the workshop manual, now the FX4 DOES NOT have a LS diff, it has a standard open rear diff, and is currently the ONLY model that you can get the ELD. any other model will have a LS rear diff.
An Electronic Locking Differential (ELD) is also available which electronically locks the differential side gears to the differential case which will allow maximum torque to both rear wheels. The operator controls the differential with a dash mounted switch.
The ELD system consists of the following components:
ELD coil, located at the rear differential
Rear differential
Mode Select Switch (MSS) (unique for ELD equipped vehicles), located on instrument panel
The ELD system, which is optional on Electronic Shift-On-The-Fly (ESOF) equipped vehicles, allows the operator to lock the rear differential side gears when in 4H or 4L mode. ELD operation is requested by pulling out on the MSS when in 4H or 4L mode.
The operator can switch between 4H mode without ELD or 4H mode with ELD at speeds up to 30 km/h (19 mph). In 4H, the ELD will disengage at speeds above 40 km/h (25 mph) and will automatically reengage at speeds below 30 km/h (19 mph).
To engage or disengage the ELD while in 4L range, the vehicle speed must be less than 90 km/h (56 mph).
An Electronic Locking Differential (ELD) is also available which electronically locks the differential side gears to the differential case which will allow maximum torque to both rear wheels. The operator controls the differential with a dash mounted switch.
The ELD system consists of the following components:
ELD coil, located at the rear differential
Rear differential
Mode Select Switch (MSS) (unique for ELD equipped vehicles), located on instrument panel
The ELD system, which is optional on Electronic Shift-On-The-Fly (ESOF) equipped vehicles, allows the operator to lock the rear differential side gears when in 4H or 4L mode. ELD operation is requested by pulling out on the MSS when in 4H or 4L mode.
The operator can switch between 4H mode without ELD or 4H mode with ELD at speeds up to 30 km/h (19 mph). In 4H, the ELD will disengage at speeds above 40 km/h (25 mph) and will automatically reengage at speeds below 30 km/h (19 mph).
To engage or disengage the ELD while in 4L range, the vehicle speed must be less than 90 km/h (56 mph).
Please please please tell me it is backwards compatible to older 9.75s!
thanks
Senior Member
Joined: Aug 2008
Posts: 381
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sorry it can't because the connector for the field coil goes through the side of the diff housing so you would have to buy a housing for the 09 then the pcm and abs/rcs modules wouldn't work in a older truck because the systems are completely different. the cost of trying to retro fit it would be huge and still probably not work as it does from the factory,
now if you were willing to spend the money on a whole diff from a 09 and wire like a simple on/off system it might but i am not sure about the 09 diff assy fitting under a 04-08. you would have to take a bunch of measurements to see.
i guess anything is possible but it is time and lots of cash that are the biggest factor's.
now if you were willing to spend the money on a whole diff from a 09 and wire like a simple on/off system it might but i am not sure about the 09 diff assy fitting under a 04-08. you would have to take a bunch of measurements to see.
i guess anything is possible but it is time and lots of cash that are the biggest factor's.
Junior Member
Joined: Aug 2009
Posts: 2
Likes: 0
sorry it can't because the connector for the field coil goes through the side of the diff housing so you would have to buy a housing for the 09 then the pcm and abs/rcs modules wouldn't work in a older truck because the systems are completely different. the cost of trying to retro fit it would be huge and still probably not work as it does from the factory,
now if you were willing to spend the money on a whole diff from a 09 and wire like a simple on/off system it might but i am not sure about the 09 diff assy fitting under a 04-08. you would have to take a bunch of measurements to see.
i guess anything is possible but it is time and lots of cash that are the biggest factor's.
now if you were willing to spend the money on a whole diff from a 09 and wire like a simple on/off system it might but i am not sure about the 09 diff assy fitting under a 04-08. you would have to take a bunch of measurements to see.
i guess anything is possible but it is time and lots of cash that are the biggest factor's.
Thanks for the info so far!
Senior Member
Joined: Sep 2006
Posts: 236
Likes: 1
From: AZ
New question regarding the Locker
On the same topic, but different subject, I saw in the Raptor specs that you are able to switch on the locker in 2wd mode as well as 4wd. Is this something that anyone on this site has tried?