When I need new tires I’m going with the F-150 5100s up front and expeditions in the rear. F150s give the same amount of lift at setting 2 as the Readylift spacer
Speedometer calibration after lift/tires
- Thread starter leadfarmer
- Start date
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I have taken my 2018 FX4 Expedition Max to the Ford dealership and they say that there isn’t even an option to recalibrate speedometer to fit my tires using the Ford FDRS. I am off around 5mph when it says I’m driving 70mph it is around 75mph. I have the ReadyLift 3/2 spacers with Goodyear Duratrac’s LT285/75R18 tires. Will be watching this Thread to see if anyone figures out the fix for this....
I agree. Total waste of money and very ill-advised. Looks dumb.
Rancidlunchmeat
2019 XLT FX4
Looks great! What wheels are those?
lurch
Well-Known Member
Why does a lift on IRS pull the rear wheels forward?
Bc you put that huge spacer on top changing the original angle of that suspension
Your gas mileage is gonna be off to if you don’t recalibrate, and your stock gearing and shifting strategy is no longer optimal for increased tire size
I think it odd that people would jack their vehicle to decenter the wheels and tires, then have to cut the wheel well liners, recalibrate their speedo, etc, the benefit of which is increasing ground clearance by one half of the increase in tire diameter. I will repeat, really dumb.
lurch
Well-Known Member
That is true of your suspension and steering components. But when driving off road you should be putting the biggest objects under your tire where they are not comminginto contact with those components. The approach, breakover and departure angle will all improve and you will have more room under your running boards where those big objects should be passing.
That being said, having Jeeped for many years around Colorado and seeing what the trails here do to well out fitted wranglers. I would not be offroading my Expedition. The lower arms are stamped metal and would not survive many hits.
Exactly. Especially true of the Max version, which is what I have. Trying to make an off road vehicle out of it is an exercise in futility.
Hate much?!?!
Unless you are realistic about the capabilities. While I am not out there rock crawling. The trails I run in my EL are an absolute blast sure beats driving on pavement but could not do them in stock form. Plus I can bring the whole family a bunch of gear and a couple friends.
The angle does not change with spacer added it just elongates the distance from the top hat to the center of hub. The center of the hub in stock form is centered to the wheel well. The rear coil over is not straight up and down but slightly angled so adding the spacer pushes the hub slightly closer to the front fender well add larger tires even less room to the fender well.
If the coil over were straight up and down and you added a spacer the wheel would not be any closer to the fender well.
I have a light colored truck and 33s and my wheel does not pushed look forward at all.
Step up to 35s one looks pushed forward couple that to a dark colored vehicle and it appears even more so.
Not sure exactly why dark colored vehicles the forward push is more pronounced but it is almost a sort of optical illusion.
The front coil overs are straight up and down which is why you do not get this effect when adding front spacers.
So if they are angled and you add the spacer and it pushes that hub, you have changed the angle of that suspension component. So yes when I say it changes the angle, it does. Also, you don’t get that effect up front however, the wheels actually get pulled into the wheel well more. Anything you put on here, spacer wise, changes the angle. It’s math
yall are both wrong. while 16 is technically correct, you changed the angles....... but the trailing arms is what does it. it is the only linkage on a plane perpendicular to normal up and down travel that would cause forward or backwards motion. the more you lift it, the more they are coming frontwards.
I don't hate it. It's just silly. I think the phrase is, "Long run for a short slide".
The angle of the strut assemble itself has not changed the overall linear dimension has increased but the angle the strut assembly is installed at has stayed the same.
Its doesn't. The rear wheels are not centered in the wheel-well at factory height either....they are offset to the front. Put a larger diameter tire in there and the gap shrinks even more....exaggerating the look.
slowstanger
New Member
For those of you who have the wrench light after using ForScan, all you have to do is go to PCM and relearn vehicle data and do the same with the TCM, this fixed it for me after I lifted mine. I used the ForScan spreadsheet to figure out the correct data to change and hit it the first time.
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