What I am guessing is they are afraid people will use the locker with the truck fully weighted down and tear up the differential in a turn.

 

1-wheel spin control (1WSC) is a standard feature included in the traction control system, regardless of the diff style.

the only difference from 09,10 to 11,12, is that in 09&10, disabling the TC also disables the 1WSC. In 11&12, the 1WSC remains active when the TC is disabled.

the e-locker, when engaged, just gives the 1WSC nothing to do. a true LSD just gives the 1WSC less to do. and open diff makes it earn its keep.

this is all in the owners manual under the Traction Control section, FWIW.

 

Yeah, makes sense. What I am not sure about is what's the need of the clutch type LS axle when the 1WSC is there anyway? It is pretty much the same feature, right, just the implementation is different?
Do all F-150's have the traction control as standard feature? Edit: I think the answer to that one is "yes". Just found it in the 2012 Order Guide.

 

Got 3.73 LSD on my 2011 3.7 XLT SCab. Was a $300 option.

 

I'm guessing the LS would be able to sustain a long messy situation where the 1WSC is there for quick little bursts.

 

Until you wear out the carbon disks of course!

 

i think the logic is that the LSD will *prevent* wheel spin, whereas 1WSC will *stop* wheel spin.

both have their limitations, LSD can only bias torque up to a certain point, 1WSC can only bias torque once there is wheel spin ... put the two together and you are biasing torque all the time.

I think that is why it is required with the HD tow package ... with 11k behind you, 4:1 first gear, 3.73:1 rear, diesel like low end torque, and a heavy foot, there could easily be enough torque to unload the right rear tire and cause it to spin. the LSD is always there and prevents wheel spin to the degree that the NVH engineers will allow. after that the 1WSC will use the brakes to bias more torque to the left rear.

at least that's my take on it.

 

nice truck

keep us all posted on how you like the 3.7 ... not many reports on here from 3.7 owners.

 

I was wondering this myself. Would it tow my 13ft camper? My old 88 F250 with a 5.0 towed it but reallllyyyyy slowly.

 

They make 13ft campers? Does that have an axle and wheels?

 

my pop-up is 12 feet

weighs about 1400 lbs dry..... i could *almost* pull that with my escort

the 3.7 has about a 5k lbs tow rating .... should be plenty to pull just about anything that most reasonable people own.

even my boat, 19 ft fiberglass I/O only weighs about 3300 lbs. my exploder seems to do fine with that even. gets poopy mileage while pulling it, but pulls all but the biggest hills without dropping any speed.

strictly speaking, the 3.7 makes more HP and TQ than my 5.0 exploder .... should prove to be plenty of truck for most people, i would think.

 

So far I have only made a couple fishing trips, but the boat launch is 100mi away. Can't tell my rig is even behind me. It's only a 16 x 48 Tracker Grizzly( maybe 1500#). Shows 19mpg at 65mph.

Just for comparison, my 05 Colorado CC I5 got 19mpg towing this rig. My 08Frontier V6 got 18mpg towing this rig. When you do 200+ miles a trip, you can gauge mileage pretty well.

 

Because the 1WSC only works in some situations. I've done the same experiment as the guy in the video does and yes the 1WSC worked and acted like a LS going in a straight line on dirt like he did. But I have found other situations where it acts like an open diff giving you the 1 wheel peel.
When I am taking off from a stop sign, making a right hand turn if I take off spiritedly to get out into traffic I get the 1 wheel peel and it is difficult to get moving. Also the other day my driveway was icey. I pulled into my driveway and got out to get the mail. When I got back in the truck I got the 1 wheel peel and the truck wouldn't move. So I put it in 4x4 and it moved no problem.IMO the e-locker would be good for someone who does some serious offroading or deals with slippery boat launches or prefers open diffs. But I can't think of anything else it's good for. I just hate how the diff is open while your making a turn.
Eventually I'm going to swap out my e-locker for a Detroit (Eaton) TrueTrac LS (no clutches). I'm kind of waiting for someone else to be the guinea pig to see if disableing the e-locker messes with any other electronics. There's a few on another F150 forum that hate it too so I'm hoping one of them make the swap to see how it works for them.

 

That's good info, thanks!

 

good call on the true trac, that would be my choice as well.

the only thing i worry about with the way the true trac works is on ice. without the 1wsp kicking in, i'm not sure it would bias enough torque to move the truck.

the true trac can only bias torque as a multiple of the wheel that is slipping .... zero resistance, zero torque bias. this is why your rock crawlers dont use them. the only way to make them work with one wheel in the air is to use the foot brake. ... i bet on ice though, the parking brake could be used to make it more effecive.

like you said, i'd like to see someone else do it first