What would cause vehicle's steering to turn on sloped road?
#1
What would cause vehicle's steering to turn on sloped road?
If I am driving down a straight flat road, but the road has an angle that is so small it isn't even noticeable, my vehicle will turn itself. I have to hold the steering wheel straight, if I left go of the steering wheel it immediately turns itself towards the downward of the slope. Example, if you are driving straight into the screen and the road is sloped like this \ my steering wheel will constantly want to turn to the right
It is insanely annoying, and has done it since the vehicle was brand new.
This is for a 2016 Ford F-150.. I took it to the dealership 3 times, they aligned it twice, it still does it. They say "this is how the truck is supposed to drive". If so, I will never ever buy another Ford again. I've drove about 5k miles since alignment and noticed the outer edges of the tires wearing very quickly also.
It also handles very poorly, steering always feels loose, and it also has very bad bump steer
I checked on the Ford forums, but those people literally know NOTHING besides "take it to da dealership". Trying out Chevy guys. Could this be a simple suspension/steering geometry problem?
Anything I can check on my own?
It is insanely annoying, and has done it since the vehicle was brand new.
This is for a 2016 Ford F-150.. I took it to the dealership 3 times, they aligned it twice, it still does it. They say "this is how the truck is supposed to drive". If so, I will never ever buy another Ford again. I've drove about 5k miles since alignment and noticed the outer edges of the tires wearing very quickly also.
It also handles very poorly, steering always feels loose, and it also has very bad bump steer
I checked on the Ford forums, but those people literally know NOTHING besides "take it to da dealership". Trying out Chevy guys. Could this be a simple suspension/steering geometry problem?
Anything I can check on my own?
Last edited by TXjeepTJ; 10-07-2018 at 07:19 PM.
#2
i have two f150s an 08 and a 15 granted both are on 35x12.50s but both trucks do this to a degree, and the alignments are spot on i do them myself with a new hunter machine. both of them did it to an extent before the bigger tires. ford calls for 0 degree of toe if a guy puts a little toe in it will help but increase tire wear. what i do is find a deserted highway and go down the middle of both lanes and see if you still have a pull, mine track straight on a level road but any crown and it feels like a pull.
#3
TECH Enthusiast
iTrader: (19)
So presuming that your tires are the same size and equal pressures, the vehicle will always pull to the side with the most positive camber and/or negative caster. So if you get a good alignment tech, he can set the alignment up to help offset that pull caused by road crown to some degree by giving the left side my positive camber and the right side more negative camber so that when the vehicle slants from the road crown the tires should have more equal contact
#7
TECH Junkie
iTrader: (4)
You are truly an idiot lol, As taman86 said...If he takes it to a knowledgeable alignment shop they can compensate for the crown in the road, Some already do this and some don't you need to ask. None of my vehicles have a noticeable pull because of the crown of the road but they are all Chevy's!
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#8
TECH Addict
I used to take care of a fairly large fleet of trucks, all the fords did that. no amount of screwing with alignment would fix it, the F250's with the solid front axle and leaf springs were the worst, the "i" beam trucks a close second, and why the A-arm trucks do it is a freeking mystery, The GM and Dodge trucks didn't do it. I even tried the alignment specs from teh heavy GM trucks that didn't have the problem on the F250's,, no help. It got worse when towing.
#9
An alignment has nothing to do with if a car pulls on crowns in the road - and that’s not even what this thread is about. Are all of you just completely retarded?
And as far as cars pulling on crowns - suspension geometry is what causes that - and it’s actually very apparent in cars with advanced geometry designed for handling, because what’s good for making a car super controllable in the turns is also what makes them not very good at going in straight lines.
And as far as cars pulling on crowns - suspension geometry is what causes that - and it’s actually very apparent in cars with advanced geometry designed for handling, because what’s good for making a car super controllable in the turns is also what makes them not very good at going in straight lines.
#10
LS1TECH Sponsor
iTrader: (41)
An alignment has nothing to do with if a car pulls on crowns in the road - and that’s not even what this thread is about. Are all of you just completely retarded?
And as far as cars pulling on crowns - suspension geometry is what causes that - and it’s actually very apparent in cars with advanced geometry designed for handling, because what’s good for making a car super controllable in the turns is also what makes them not very good at going in straight lines.
And as far as cars pulling on crowns - suspension geometry is what causes that - and it’s actually very apparent in cars with advanced geometry designed for handling, because what’s good for making a car super controllable in the turns is also what makes them not very good at going in straight lines.
First of all, Caster lead can hugely change how a car tracks. Adding caster lead (more positive in the RF vs. the LF) can kill a lot of the pull to the right on a crowned road, if you are in the right lane. But makes it worse if you are in the left lane on a crowned road. Because not all roads are crowned, or crowned the same way I just tend to match the caster and if it pulls a little to the right on road X, so be it.
Now to the statement about base geometry and cars that handle aren't stable at speed. Basically that's all not correct. I mean you could have a crappy geometry, but this car doesn't have a terrible setup in general. And Corvettes and Porsche's and lots of cars track like freight trains at speed, even with even more aggressive handling alignments on them... if they aren't just some guess. My C7 Grand Sport has a very aggressive alignment in it for my Autocrossing and track use, and it's dead stable @ 140.
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Results matter. Talk is cheap. We are miles beyond the success anyone else has had with the 4th gens, and C5, C6, C7 Corvettes,
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#11
Banned
iTrader: (2)
Every single road in Florida that is only TWO LANES....ONE LANE going-ONE LANE coming. Has slope purposely built into them so if someone falls asleep the car will not cross the centerline and it will instead go off to its own side of the road. Been like that forever.
All highways with multiple lanes do not have slope built in.
ALL cars and trucks, if you let go of the wheel, will immediately start to go right and go off the road to the right if you drive on a two lane road....at least here in Florida. I would assume roads all over the USA are built the same.
.
All highways with multiple lanes do not have slope built in.
ALL cars and trucks, if you let go of the wheel, will immediately start to go right and go off the road to the right if you drive on a two lane road....at least here in Florida. I would assume roads all over the USA are built the same.
.
#12
TECH Junkie
iTrader: (4)
Every single road in Florida that is only TWO LANES....ONE LANE going-ONE LANE coming. Has slope purposely built into them so if someone falls asleep the car will not cross the centerline and it will instead go off to its own side of the road. Been like that forever.
All highways with multiple lanes do not have slope built in.
ALL cars and trucks, if you let go of the wheel, will immediately start to go right and go off the road to the right if you drive on a two lane road....at least here in Florida. I would assume roads all over the USA are built the same.
.
All highways with multiple lanes do not have slope built in.
ALL cars and trucks, if you let go of the wheel, will immediately start to go right and go off the road to the right if you drive on a two lane road....at least here in Florida. I would assume roads all over the USA are built the same.
.
#13
I have to drive in Downtown Houston everyday for work, and those roads are horrible there. If I let go of the steering wheel, and I **** you not, the wheel will turn from 12 o'clock position to 3 o'clock position. With the constant changes in the road, I'm constantly feeling the wheel wanting to go to either 3 oclock or 9 oclock, I'm white knuckling that bitch the whole time hoping I don't run into cars next to me lol. I never ever had an issue with the Silverado I had before the F150
Last edited by TXjeepTJ; 10-05-2018 at 11:09 AM.
#14
So presuming that your tires are the same size and equal pressures, the vehicle will always pull to the side with the most positive camber and/or negative caster. So if you get a good alignment tech, he can set the alignment up to help offset that pull caused by road crown to some degree by giving the left side my positive camber and the right side more negative camber so that when the vehicle slants from the road crown the tires should have more equal contact
#15
TECH Enthusiast
iTrader: (19)
An alignment has nothing to do with if a car pulls on crowns in the road - and that’s not even what this thread is about. Are all of you just completely retarded?
And as far as cars pulling on crowns - suspension geometry is what causes that - and it’s actually very apparent in cars with advanced geometry designed for handling, because what’s good for making a car super controllable in the turns is also what makes them not very good at going in straight lines.
And as far as cars pulling on crowns - suspension geometry is what causes that - and it’s actually very apparent in cars with advanced geometry designed for handling, because what’s good for making a car super controllable in the turns is also what makes them not very good at going in straight lines.
the funny thing is that once Sam chimed in you have nothing else to say?
from my EXPERIENCE as a trained and certified suspension and steering tech, fords are more notorious for having soft steering causing unpredictable bump steer. It's usually compounded with worn components and bushings. When they went to a more modern setup with a arms it helped a lot. It's usually not a cheap fix, cuz it usually entails a complete rebuild of the front end including shocks to get back to factory specs.
#17
TECH Fanatic
iTrader: (7)
If I let go of the steering wheel, and I **** you not, the wheel will turn from 12 o'clock position to 3 o'clock position. With the constant changes in the road, I'm constantly feeling the wheel wanting to go to either 3 oclock or 9 oclock, I'm white knuckling that bitch the whole time hoping I don't run into cars next to me lol. I never ever had an issue with the Silverado I had before the F150
#18
Yikes, that sounds like more than an alignment issue, possibly bent/damaged front suspension or maybe a bent rim. I'm in Houston too, and the shop that aligned my truck after I rebuilt the whole front end was B&B Automotive on Hempstead. They actually know what they're doing, and mine drives straight as an arrow. I'm not familiar with Fords, but they might be able to help you figure out just what's going on.
#19
LS1TECH Sponsor
iTrader: (41)
oh this is priceless, nobody literally can make up the crap that comes from your brain. If only natural selection still existed in this world, what a shame. So where did you learn that from, playing gran turismo?
the funny thing is that once Sam chimed in you have nothing else to say?
from my EXPERIENCE as a trained and certified suspension and steering tech, fords are more notorious for having soft steering causing unpredictable bump steer. It's usually compounded with worn components and bushings. When they went to a more modern setup with a arms it helped a lot. It's usually not a cheap fix, cuz it usually entails a complete rebuild of the front end including shocks to get back to factory specs.
the funny thing is that once Sam chimed in you have nothing else to say?
from my EXPERIENCE as a trained and certified suspension and steering tech, fords are more notorious for having soft steering causing unpredictable bump steer. It's usually compounded with worn components and bushings. When they went to a more modern setup with a arms it helped a lot. It's usually not a cheap fix, cuz it usually entails a complete rebuild of the front end including shocks to get back to factory specs.
I'm busy, I have far more to do than to hang on LS1tech.com all day. But let's touch on some details. The crap that comes from my brain is pretty well proven to work, and work well. Also we are not talking about a Ford here, are we? Even if we were you are still wrong.
Geometry. Guess what, it has no idea if you are on a crowned road or not, that doesn't magically change when the road surface changes. Your claim that GEOMETRY being the cause is just plain old wrong. Maybe you think the alignment changes geometry? Again you'd be wrong. Geometry is set by the mounting locations of the control arms. Even if you are the world's best alignment tech, you can't change that on a car without some trick parts. AND then you seem not to understand that because Geometry is difference on all cars and truck that are not of the same model exactly. I.E. the geometry of a Corvette is not the same as a Camaro, a Gen 5 Camaro not the same as a 4 or 6. BMW vs. Mustang, different. I guess because it's a geometry problem all those cars but one would yank off the road.
__________________
www.stranoparts.com --814-849-3450
Results matter. Talk is cheap. We are miles beyond the success anyone else has had with the 4th gens, and C5, C6, C7 Corvettes,
10 SCCA Solo National Championships, 2008 Driver of they Year, 2012 Driver of Eminence
13 SCCA Pro Solo Nationals Championships
2023 UMI King of the Mountain Champion
www.stranoparts.com --814-849-3450
Results matter. Talk is cheap. We are miles beyond the success anyone else has had with the 4th gens, and C5, C6, C7 Corvettes,
10 SCCA Solo National Championships, 2008 Driver of they Year, 2012 Driver of Eminence
13 SCCA Pro Solo Nationals Championships
2023 UMI King of the Mountain Champion