ecoboost question
12-21-2011, 05:46 PM
#11
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The Locker: Both rear wheels are locked together. Means you can only go straight…………if you attempt to turn sharply it will put a great deal of pressure on the diff and the tires. The tires will become like an eraser on dry pavement when turning the truck – scuffing the tread off the tires. The advantage of Locking Diff is that there absolutely no slippage of one wheel over the other on the slipperiest of surfaces – thus the maximum traction can be obtained. The disadvantage is: The driver has to make intelligent choices as to “when” to turn it “on” and “off”.
The LS: Basically a friction disc(s) in the diff. Works like a friction clutch. The two rear wheels are “almost” locked together, but the truck can still turn easily without any damage to the diff or any scuffing of the tires. The advantage is, it is always on, requires no intelligence from the driver. The disadvantage is, it takes more power (not very much) to turn corners and thus uses a little more gas.
Typically Open Diff: If one tire losses traction it will just spin, truck will not go.
Ford does use some pretty advance traction control. Both engine power reduction and extreme high speed alternate wheel braking. Therefore they are able to mimic the best of both worlds (LS and Locker). As one wheel starts to spin, the brake is applied to that “one” wheel and this forces the power to the wheel that has traction. This happens so fast, many times a second, independently controlled to each wheel many drivers are completely unaware what is going on.
These new computer controls on the 2011/12 models is a significant improvement over what is in that 2008 video.
The LS: Basically a friction disc(s) in the diff. Works like a friction clutch. The two rear wheels are “almost” locked together, but the truck can still turn easily without any damage to the diff or any scuffing of the tires. The advantage is, it is always on, requires no intelligence from the driver. The disadvantage is, it takes more power (not very much) to turn corners and thus uses a little more gas.
Typically Open Diff: If one tire losses traction it will just spin, truck will not go.
Ford does use some pretty advance traction control. Both engine power reduction and extreme high speed alternate wheel braking. Therefore they are able to mimic the best of both worlds (LS and Locker). As one wheel starts to spin, the brake is applied to that “one” wheel and this forces the power to the wheel that has traction. This happens so fast, many times a second, independently controlled to each wheel many drivers are completely unaware what is going on.
These new computer controls on the 2011/12 models is a significant improvement over what is in that 2008 video.
good info.
Still trying to get this question answered, On a open diff how is the power trasfered to the other wheel? seems impossible on open diff.
The limited slip has nothing to do with computer controls.
braking the wheel that is spining does not equate to power to the non spining wheel on open diff.
12-21-2011, 06:48 PM
#12
Race Red '12 XLT SCrew EB
solve your question by jacking up the rear end, with both wheels off the ground turn one tire any direction. if the other tire turns the same direction you have limited, if it turns opposite you have open.
12-21-2011, 07:00 PM
#13
does the ecoboost package come with limited slip rear ?
Reason I ask is my truck is axle code 15 witch is 3.15 gears and both wheels spin the same on the pavement with traction control ON or OFF.
I though th 15 axle code was non limited slip diff, but both tires are spin on pavement or dirt.
Thanks for any info you might have.
Reason I ask is my truck is axle code 15 witch is 3.15 gears and both wheels spin the same on the pavement with traction control ON or OFF.
I though th 15 axle code was non limited slip diff, but both tires are spin on pavement or dirt.
Thanks for any info you might have.
If you have limited slip or locker axle when the 4x4 is in 4x2 and on ice or very slick surface you won't be able to go in a strait line. It will always slip off to the side/fish tail. Very nervous time and best to unlock if on the move. 4x4 is much superior and limited slip just jumps in there cause the front is pulling so good. Limited slip or locker without front wheels pulling will put you right into the ditch at 35 mph all the time. 
Traction control always tries to keep from spinning and you have to disconnect it to rock the boat to get unstuck. Believe the first push on the button diengages and the second push shuts it off completely. Haven't had to shut it off yet, and the Eq Has just powered thru the stuff so far.
12-22-2011, 07:05 AM
#14
good info.
Still trying to get this question answered, On a open diff how is the power trasfered to the other wheel? seems impossible on open diff.
The limited slip has nothing to do with computer controls.
braking the wheel that is spining does not equate to power to the non spining wheel on open diff.
Still trying to get this question answered, On a open diff how is the power trasfered to the other wheel? seems impossible on open diff.
The limited slip has nothing to do with computer controls.
braking the wheel that is spining does not equate to power to the non spining wheel on open diff.
Basically, it is designed that if the LS diff is not able to accomplish what it needs to prevent/reduce slippage then the computer will begin to assist it. Thus all three elements of engine power control, braking control, and LS can be working together to hopefully get the job done.
" braking the wheel that is spining does not equate to power to the non spining wheel on open diff"
yes it does 100%
Last edited by HoustonFordGuy; 12-22-2011 at 07:22 AM.
12-22-2011, 07:08 AM
#15
get a vehicle to test with a real Open Diff. When you grab one tire and turn it the wheel on the other side will be turning the opposite direction. If someone grabs the opposite wheel to stop it from turning, you will not be able to turn your wheel.
Last edited by HoustonFordGuy; 12-22-2011 at 07:10 AM.
12-22-2011, 07:16 AM
#16
Also, in regard to the “computer controls” you will notice in your 2011/12 manuals, it states something to the effect that if there is a LOT of braking control action taking place (because of un-skilled driver) because of slippage the system (computer braking overrides) will shut down the braking action because they are getting to HOT. It will shut down to prevent damage to the brakes. I think most of that is under the sections on traction control system.
12-22-2011, 11:57 AM
#17
This basic YouTube video explains some more basics, it last about 5 min, you will need sound for it.
For the most part both Ford and Toyota actually have this stuff dialed in good IMO. These fancier computers on the new trucks are slicker than deer guts on a door ****.
For the most part both Ford and Toyota actually have this stuff dialed in good IMO. These fancier computers on the new trucks are slicker than deer guts on a door ****.