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Traction Control & Diff Locker Questions

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Old Mar 13, 2017 | 08:03 PM
  #21  
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Originally Posted by moguy1973

you can lock and unlock it. Probably looking at $1200 for parts and install.

I believe my 2015 has the 3.55 Non-Limited Slip. Good enough? Not sure the difference between a Non-limited Slip vs Limited Slip differential. Looks like all new F150s on offer the choice of a Non-Limited Slip or Electronic Rear Differential Locker.

Like said above, Non-limited slip is going to put the power to only one wheel. Too much slip and you get one-wheel-peel. Limited slip have a set of clutches or springs or a combination of both that allow power to be put to both wheels on an axle. Even the 2015+ F150's with e-lockers have open differentials until the driver pulls out the e-locker ****. Just don't want to pull that out when you are going around a turn. Won't end up good.


Not true, the Elsd / torque vectoring system will brake the spinning wheel (without throttle intervention if the TC button is pushed once), and functions on both axles, much more effective than just the lighter rear end with a the old mech lsd setup.
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Old Mar 13, 2017 | 11:12 PM
  #22  
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Originally Posted by moguy1973
The only 2015 F150's that have the 9.75" gear sets are the ones that have the heavy duty payload package. All the others have 8.8". That US Standard gear website is incorrect. I know for a fact that my truck has an 8.8" in it. The 2.7L does not offer the heavy duty payload package.
I thought that was try too but someone posted the 2016 ford f150 technical specs and it shows on page 14 that if you get the Elocker rear diff that you get the 9.75" rear end. If you get the HDPP you get the 9.75" HD rear end. All I know for sure is my differential cover on my 3.55 max tow elocker has 12 bolts and everything I can find says that is a 9.75" rear end, 8.8 has 10 bolts.

I can't figure out how to attach the pdf
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Old Mar 14, 2017 | 10:32 AM
  #23  
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Originally Posted by Livoniabob
They had fresh dry powder snow. They wouldn't be having fun in the same amount of settled wet snow.

I think the air dam would of stopped them in just a few feet.
That review had what we call a light snow. It's powered and not wet, and it's only a few inches deep.

I've had my 2008 Sport Trac and F150s in snow over the doors without a problem, but I did have them in 'real' (locked) 4WD Hi and my differentials were open with Electronic Limited Slip as I didn't have the rear differential locked on my F150s, no need to.
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Old Mar 14, 2017 | 10:35 AM
  #24  
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Originally Posted by isthatahemi
The Elsd on the newer trucks makes them way more capable than the old rear only mechanical LSD. Just shut the throttle control off with one touch of the TC button, pr 2 quick taps to raise the threshold of intervention. If you need 100%, hold the TC button f0r 5 seconds, and go nuts. I've owned many configurations, the elsd at both ends is pretty amazing.
You can test electronic limited slip by turning off TC and having some watch as you spin the tires in snow and watch the tires switch off then spin together. The ford F150 manuals back in 2012 use to explain this much better than the omission of it in the 2015+ F150 manuals. Guess it confused people. I've read about issues with the clutch packs in the 2010 and 2011 F150 LSDs wearing out and needing replacement. People were so happy they were replaced with electronic limited slip and lockers.

For the record, electronic limited slip isn't great for off roading as your brakes will eventually heat up and the electronic limited slip will be disabled to prevent brake failure. This is common on all makes with electronic limited slip.

Last edited by Mike Up; Mar 14, 2017 at 10:40 AM.
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Old Mar 15, 2017 | 02:13 AM
  #25  
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Originally Posted by isthatahemi
The Elsd on the newer trucks makes them way more capable than the old rear only mechanical LSD. Just shut the throttle control off with one touch of the TC button, pr 2 quick taps to raise the threshold of intervention. If you need 100%, hold the TC button f0r 5 seconds, and go nuts. I've owned many configurations, the elsd at both ends is pretty amazing.
They are not as capable in circumstances when you want full uninterrupted wheel spin (with no braking) of a true LSD, such as driving off-road in mud or sometimes in snow.
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Old Mar 15, 2017 | 09:04 AM
  #26  
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Originally Posted by isthatahemi
Not true, the Elsd / torque vectoring system will brake the spinning wheel (without throttle intervention if the TC button is pushed once), and functions on both axles, much more effective than just the lighter rear end with a the old mech lsd setup.
What you described is neither elsd nor torque vectoring.
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Old Mar 15, 2017 | 09:06 AM
  #27  
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Someone mentioned gears and parts for the 8.8 however one needs to be sure that the parts are for the version that we actually have because it is not a standard 8.8, it is a modified, beefier version of the 8.8.
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Old Mar 15, 2017 | 09:08 AM
  #28  
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Folks, the F150 has an open differential with optional e-locker. It is not an electronic limited slip differential (ELSD), as can be found on some sports cars these days.

The stability control system that is present on most ( maybe all ) vehicles these days will apply the brake on the slipping wheel to cause the open differential to start to apply torque to the non-slipping wheel. This is a sort of "pretend limited slip" that can reduce the need to have a true limited slip differential.
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Old Mar 15, 2017 | 11:54 AM
  #29  
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Originally Posted by etekberg
Folks, the F150 has an open differential with optional e-locker. It is not an electronic limited slip differential (ELSD), as can be found on some sports cars these days.

The stability control system that is present on most ( maybe all ) vehicles these days will apply the brake on the slipping wheel to cause the open differential to start to apply torque to the non-slipping wheel. This is a sort of "pretend limited slip" that can reduce the need to have a true limited slip differential.
Yes, it is. Fords term for this is one wheel spin control. It is an electronic limited slip.
The one wheel spin control is always active. It cannot be turned off by disabling the other nannies.
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Old Mar 17, 2017 | 07:54 PM
  #30  
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Originally Posted by toledoUPSguy
I thought that was try too but someone posted the 2016 ford f150 technical specs and it shows on page 14 that if you get the Elocker rear diff that you get the 9.75" rear end. If you get the HDPP you get the 9.75" HD rear end. All I know for sure is my differential cover on my 3.55 max tow elocker has 12 bolts and everything I can find says that is a 9.75" rear end, 8.8 has 10 bolts.

I can't figure out how to attach the pdf
I was disappointed to find out the 5.0 with the rear locker is the 8.8 with a new 12 bolt cover.
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