Go Back   Ford Truck Enthusiasts Forums > Diesel > 6.7L Power Stroke Diesel
Sign in using an external account
Register Forgot Password?


6.7L Power Stroke Diesel 2011-2015 Ford Powerstroke 6.7 L turbo diesel engine

     
Old 11-25-2014, 02:29 PM
How-Tos on this Topic
 
Last edit by: IB Advertising
See related guides and technical advice from our community experts:

Browse all: 4WD Guides
Print Wikipost

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 12-07-2011, 08:21 PM
Pitt4212 Pitt4212 is offline
Junior User
 
Join Date: Feb 2010
Posts: 55
Pitt4212 is starting off with a positive reputation.
Electronic Locking Rear Differential Question

I test drove the 3.55 with the e-locking rear end and wasn't very impressed at all. I was asking myself what the point of this was and am writing this to see if anybody can answer it for me because I am sure Ford does have a reason for it. Here's my view. If you put it in lock mode it only works up to about 20 mph then goes back to regular one wheel drive. The problem I have is say when it is raining out and you are going 30 mph and you punch it, with these crazy powerful diesels you are definitely going to spin the tires in which you lose control with the e-locker. If you get just the regular limited slip differential when going 30 mph and punching it the tire will slip momentarily until the axle locks up automatically helping to gain traction. Can someone please tell me the big advantage to get the e-locking rear end? When I plow I'm in 4x4 and was thinking that you could maybe just plow in 2 wheel drive with the rear end locked but that's all I can see this being good for. Hopefully I will be signing paper work on my truck tomorrow and would like some feedback.
Reply With Quote
  #2  
Old 12-07-2011, 08:29 PM
Andrew010's Avatar
Andrew010 Andrew010 is offline
Posting Guru
 
Join Date: Nov 2010
Location: Altoona, Ia
Posts: 1,207
Andrew010 is gaining momentum as a positive member of FTE.Andrew010 is gaining momentum as a positive member of FTE.
I use it to plow in 2wd. Works ok.

Honestly, it's probably not worth the money and to do over, I wouldn't have got it. A standard limited slip would be better, IMO.
__________________
2011 F250 CC SB 6.7 PSD Lariat Ultimate - 20" Moto Metal Wheels with 35" Nitto Trail Grapplers - Amp Power Steps - Black Mesh Grille - Recon Smoked Lights

4.5" lift - Tinted Windows - Line X - Truxedo Tonneau Cover - Ride Rites - Wireless Air - Traction Bars - S&B Intake - Deleted - H&S Tuned with 5" Straight Pipe
Reply With Quote
  #3  
Old 12-07-2011, 08:37 PM
dschuffert's Avatar
dschuffert dschuffert is offline
Posting Guru
 
Join Date: May 2005
Location: Illinois
Posts: 1,079
dschuffert is gaining momentum as a positive member of FTE.dschuffert is gaining momentum as a positive member of FTE.
It works well for me on the farm, but haven't had a use for it yet on the pavement, but I haven't had the truck for a winter here yet. My property has hard clay on some of the acreage and black loam on other parts of the acreage. The clay is very slippery when wet and the loam just sinks. When I am slipping from a start, typically while pulling something at a very low speed, I can pull the **** out and engage the locking rear end and it gets me going. Granted, I could probably do the same thing by engaging the 4WD, but at least I feel like I am getting value out of that option.
__________________
2011 F250 6.7 PSD 4X4 3.55 ELD CC SB Moon Roof Chrome Package NAV Lariat
April 2011 Build, ARE TW Cap, Recon LED Cab Lights, Air Lift Loadlifter 5000,
WeatherTech - Mats, Bug Shield, Mud Flaps; Bed Rug, McGard Tailgate Lock,
Autoenginuity Proline with Enhanced Ford Expansion.

2011 Explorer Limited - Wife's Vehicle
2005 F250 6.0 PSD 4X4 3.73 CC SB Lariat - Sold
Reply With Quote
  #4  
Old 12-07-2011, 09:51 PM
jfritz_drfritz jfritz_drfritz is offline
Senior User
 
Join Date: Dec 2009
Location: Regina, Saskatchewan
Posts: 181
jfritz_drfritz is gaining momentum as a positive member of FTE.
Quote:
Originally Posted by Pitt4212 View Post
I test drove the 3.55 with the e-locking rear end and wasn't very impressed at all. I was asking myself what the point of this was and am writing this to see if anybody can answer it for me because I am sure Ford does have a reason for it. Here's my view. If you put it in lock mode it only works up to about 20 mph then goes back to regular one wheel drive. The problem I have is say when it is raining out and you are going 30 mph and you punch it, with these crazy powerful diesels you are definitely going to spin the tires in which you lose control with the e-locker. If you get just the regular limited slip differential when going 30 mph and punching it the tire will slip momentarily until the axle locks up automatically helping to gain traction. Can someone please tell me the big advantage to get the e-locking rear end? When I plow I'm in 4x4 and was thinking that you could maybe just plow in 2 wheel drive with the rear end locked but that's all I can see this being good for. Hopefully I will be signing paper work on my truck tomorrow and would like some feedback.
In a minimum traction situation such as you describe you are more likely to lose control of the vehicle if the rear axle is locked, since both wheels will break traction and then you can spin out. With the differential in the open position one wheel will spin and the other does not thus maintaining some stability. The elocker gives you a 50 - 50 split in power to the rear wheels when engaged, the LSD provides much less of a split to the wheel with traction, and potentially nothing to the wheel with traction if the other is on ice (as opposed to the elocker which can deliver 50% of available torque to the wheel with traction). It would be a rare situation where one really NEEDS the differential locked at a speed above 20 mph. I am sure the engineers do not allow it simply because of the previously mentioned stability problem if you manage to break traction wit both wheels.
Reply With Quote
  #5  
Old 12-07-2011, 10:16 PM
wtrlogd's Avatar
wtrlogd wtrlogd is offline
Senior User
 
Join Date: Feb 2011
Location: Vancouver, WA
Posts: 116
wtrlogd is starting off with a positive reputation.
Works good for turning around, when the road is too narrow to jocky around one of these long wheel base rigs. Lock and spin
__________________
'11 F350 XLT Fx4 6.7 3.55 SC LB
Reply With Quote
  #6  
Old 12-08-2011, 06:43 AM
JCU Delt Ox JCU Delt Ox is offline
New User
 
Join Date: Sep 2010
Posts: 15
JCU Delt Ox is starting off with a positive reputation.
It also works great for pulling a boat out of the water on a wet slip. You can avoid just about all spinning...
Reply With Quote
  #7  
Old 12-08-2011, 07:01 AM
KC8QVO's Avatar
KC8QVO KC8QVO is offline
Posting Guru
 
Join Date: Jul 2008
Posts: 1,775
KC8QVO has a great reputation on FTE.KC8QVO has a great reputation on FTE.KC8QVO has a great reputation on FTE.KC8QVO has a great reputation on FTE.
My 2010 6.4 had a limited slip axle and it wasn't worth a crap.

The limited slip axles in the Ford's is not an auto-locker. The truck I had before my 2010 was a 2003 half ton chevy and it had an auto locker in it. That worked quite well. In contrast, the limited slip in my 2010 ford was worthless.

The way the limited slip axles work is there is a clutch pack inside the diff. The clutch offers resistance to the axle shafts turning against each other, like a brake on a wheel - it doesn't lock the axle up it just resists it moving. This transmits SOME of the drive power back over to the wheel that has traction in a limited traction scenario, not all of it as a locked axle does.

That having been said, the SRW trucks have traction control (not sure about the DRW's? Is it just stability control they lack?). The traction control on my truck works well enough that I can't hardly get the tires to chirp if I stomp on it. Once the turbo kicks in the tires will spin briefly then the power is dropped and all and the tires stick. I have not tested this theory yet, but what someone explained to me a while ago is that the traction control will control the individual wheel brakes. This tells me that if one tire is spinning the traction control will brake it. On an open diff if you brake the wheel spinning that power is sent to the other side of the diff - the wheel with traction. In essence, it does the same thing as a limited slip - clutch pack in the diff = brake pads/rotor on the spinning wheel.

My opinion - the ELD is the way to go. My limited slip diff in my 2010 was so bad I had to put the truck in 4x4. With the ELD I turn it on and away I go - most of the time For the other times theres 4x4.
__________________
Steve
2011 F350 CCLB KR 6.7 - FX4, Bronze Metallic/Pueblo Gold, factory KR 20"s, Adobe interior, nav, no moon roof&chrome pkg, Rancho RS9000XL Shocks w/MyRide
Previous trucks: 2001 GMC 2500 6.0, 2010 F250 CC SB PSD 4x4 Lariat 3.55, 2003 Chev 1500 Z71 5.3L, 2005 F350 CCLB DRW 6.0 - work truck, 1998 Chev S10
"To truly solve a problem you must first understand the problem"
Reply With Quote
  #8  
Old 12-08-2011, 08:03 AM
brightideaselectric brightideaselectric is offline
Senior User
 
Join Date: Aug 2011
Location: Battle Creek, MI
Posts: 103
brightideaselectric is starting off with a positive reputation.
So when driving in the winter, this is the first winter with this truck, is it okay to leave the differential locked on snow covered roads and let it automatically disengage over 20 mph and then let it re-engage when the speed comes down under 20mph. Or should I just manually engage it while at a stop and then disengage it after I am up and moving?
Reply With Quote
  #9  
Old 12-08-2011, 09:19 AM
wtrlogd's Avatar
wtrlogd wtrlogd is offline
Senior User
 
Join Date: Feb 2011
Location: Vancouver, WA
Posts: 116
wtrlogd is starting off with a positive reputation.
Quote:
Originally Posted by brightideaselectric View Post
So when driving in the winter, this is the first winter with this truck, is it okay to leave the differential locked on snow covered roads and let it automatically disengage over 20 mph and then let it re-engage when the speed comes down under 20mph. Or should I just manually engage it while at a stop and then disengage it after I am up and moving?
Don't see how it'd hurt anything, mechanically, however, not sure it's really what you want. Lockers and ice aren't the best combination, unless you're just having fun. Best to leave it in four wheel drive and leave the traction control on.
Locking the rear is best reserved for off road situations, deep snow, boat ramps, etc.
__________________
'11 F350 XLT Fx4 6.7 3.55 SC LB
Reply With Quote
  #10  
Old 12-08-2011, 10:02 AM
cford716 cford716 is offline
Elder User
 
Join Date: Apr 2010
Posts: 645
cford716 is gaining momentum as a positive member of FTE.
Quote:
Originally Posted by brightideaselectric View Post
So when driving in the winter, this is the first winter with this truck, is it okay to leave the differential locked on snow covered roads and let it automatically disengage over 20 mph and then let it re-engage when the speed comes down under 20mph. Or should I just manually engage it while at a stop and then disengage it after I am up and moving?
Not sure if it will do any damage but I am pretty sure it was not designed for that. It will disengage above 25 mph and then will not re-engage until you drop to 19 mph.
Reply With Quote
  #11  
Old 12-08-2011, 10:05 AM
djousma djousma is offline
Elder User
 
Join Date: Mar 2005
Posts: 515
djousma has a good reputation on FTE.djousma has a good reputation on FTE.
Quote:
Originally Posted by Pitt4212 View Post
I test drove the 3.55 with the e-locking rear end and wasn't very impressed at all.
I guess I dont understand what is to be impressed about or not. Seems like you are spending a lot of brain cells on something that you cannot change.

Either:

1) live with the 3.55 ELD

or

2) dont get snowplow or camper package, and get 3.31

If 1 or even 2 MPG is going to break the deal, then maybe the truck is not for you.

Just askin.
__________________
Dave

2011 F350 Lariat 4x4 FX4 SRW CC SB 6.7 Sterling Gray Metallic
SOLD:2005 F350 XLT 4x4 FX4 SRW SC SB 6.0 PSD/TS Med. Wedgewood Blue, Dual Alternators, Tow Command, Bypass Coolant filtration.
Reply With Quote
  #12  
Old 12-08-2011, 10:50 AM
Painted Horse's Avatar
Painted Horse Painted Horse is offline
Posting Guru
 
Join Date: Nov 2005
Posts: 1,078
Painted Horse has a great reputation on FTE.Painted Horse has a great reputation on FTE.Painted Horse has a great reputation on FTE.Painted Horse has a great reputation on FTE.
I can't tell you how many times I've been stuck with Limited Slip and 4x4. One front tire and one back tire spinning. Just because I backed in to hook up to a trailer and had ice or mud under one of the tires. And the opposite tire was on firm ground,

Take the example of pulling off the shoulder of the road and getting the passenger side tires into a snow bank that a plow has pushed up. One tire on pavement , one tire in snow. At least with the locker, the tire on pavement with catch.

As far as leaving it engaged all the time. I wouldn't, Every slow turn you will hear the tires chirp as you wear off excess rubber. Engage it when you need it. Your tires will last a LOT longer and I suspect your rear end will have less wear and tear
__________________
2011 F350 CC LB SRW 6.7L Auto 4x4
2006 F350 CC LB SRW 6.0L Auto 4x4 2003 F350 CC SB SRW 6.0L Auto 4x4 2000 F350 CC SB SRW 7.3L Auto 4x4
http://www.fuelly.com/sig-us/59436.png
Reply With Quote
  #13  
Old 12-08-2011, 03:40 PM
TexasA&M's Avatar
TexasA&M TexasA&M is offline
Elder User
 
Join Date: Aug 2010
Location: Ft. Worth, TX
Posts: 665
TexasA&M is gaining momentum as a positive member of FTE.TexasA&M is gaining momentum as a positive member of FTE.
The elocker works more like a spool than a locker... it is a direct mechanical linkage between the two axle shafts, and thus the two wheels. Much different than how a traditional locker works. It is not designed to be used on pavement or hard surfaces at all because one of the tires will be forced to slip during turns and then something has to give... either the earth or the truck. In the dirt, the ground moves easily... on the pavement it's usually the tires that give (or worse case the rear end).

The LSD is a waste, in my opinion... I really wish that my 2006 had a selectable locker. I had one on my old Toyota and used it all the time; mainly at the boat ramp, or as someone else said, when I would pull into the ditch and have one tire in the mud and one on the street. It is extremely helpful for those situations. I wouldn't leave it engaged all the time though, especially on wet or ice roads as it will NEGATIVELY affect the ride/control of your truck.
Reply With Quote
  #14  
Old 12-08-2011, 03:53 PM
Nipperdog's Avatar
Nipperdog Nipperdog is offline
Elder User
 
Join Date: Jun 2007
Location: The Sunshine State
Posts: 557
Nipperdog is gaining momentum as a positive member of FTE.
I bought my truck from the dealer's stock and it has the 3:55 locker.
I don't need it now, but it's nice to know it's there if I do, such as a slippery boat ramp ect.
__________________
2011 F-250 6.7 Lariat Crew 4X4 3.55 SRW Tuxedo Black
Traded 2008 F250 6.4 4X4 Lariat 3.73 SRW SC
Ford 6.7 Scorpion "It don't mean a thing if it ain't got the sting"
Reply With Quote
  #15  
Old 12-08-2011, 07:25 PM
Rutcutter's Avatar
Rutcutter Rutcutter is offline
Senior User
 
Join Date: Feb 2010
Location: Hot Springs
Posts: 434
Rutcutter is gaining momentum as a positive member of FTE.
I really like my ELD as my 08 limited was useless,I engage it all the time whenever I see a muddy road. Works great,wished Ford would give us one for the front end on the FX4 trucks.
__________________
2011 F350 6.7 CC/SB FX4 White Plat,Lariat ultimate
Warn Gen II winch mount
2" Autospring leveling kit,35/12.50/20 Toyo M/T's
Rancho shocks & dual stabilizers,
HID Headlight upgrade,Adj. High Idle Mod
2008 6.4L CC (Sold)
Reply With Quote
Old 12-08-2011, 07:25 PM
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Looks Like Limited Slip Not An Option For 2015??... 3rdIQ 2015+ F150 7 10-04-2014 01:20 PM
Expedition 2000 AWD locked diffs kab00m Expedition & Navigator 6 04-26-2013 12:43 AM
Disappointed with my rear end...(Hold the jokes) devongarver Super Duty & Heavy Duty 86 11-03-2010 06:02 PM
2011 Locker anyone think or know if we will be able to put this on older model trucks Wagion Super Duty & Heavy Duty 8 07-26-2010 09:24 PM
Ford 8.8" limited slip / E-locker? smurray Clutch, Transmission, Differential, Axle & Transfer Case 0 05-09-2005 06:52 AM


Go Back   Ford Truck Enthusiasts Forums > Diesel > 6.7L Power Stroke Diesel

Tags
2009, 67, diff, differential, driving, electronic, f250, f350, ford, locked, locker, locking, pulling, rain, rear

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump


Participate In The Forums

Create new posts and participate in discussions. It's free!

Sign Up »





All times are GMT -5. The time now is 03:57 AM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup