Uneven ride height between left and right rear

[astronaughtyabio]

Hi All

I have noticed that there is around 20mm ride height difference between my rear left and right. Is that right?

Pressures and tread is the same

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[markboris]

Hi All

I have noticed that there is around 20mm ride height difference between my rear left and right. Is that right?

Pressures and tread is the same

Are you going to tell us which side is lower? If I had to guess, I would say the left side (drivers) because I have seen this on a few Mach-E's and don't know why either.

 

[astronaughtyabio]

Are you going to tell us which side is lower? If I had to guess, I would say the left side (drivers) because I have seen this on a few Mach-E's and don't know why either.

UK car, so in my case lower on my driver's side Right Rear

 

[kamorela]

UK car, so in my case lower on my driver's side Right Rear

*Update: I was reminded that @astronaughtyabio is in the UK and, as such, the driver side is the right side. With profound embarrassment I offer my sincere apology for jumping to conclusions without even trying to collect pertinent facts. This was short-sighted on my part leading to a much deserved 'lesson learned'. Again, I apologize for my ignorance. With thanks to @markboris.
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Driver's side right rear?

For clarity, the standard used for references to location, direction or orientation are as if sitting in the driver's seat. So 'driver side' = left side. Driver's side rear would be left rear. 'Passenger side' = right side. Passenger side front tire would be right front. Etc.

Presumably 'driver's side Right Rear' is from the reference point of standing outside the vehicle facing its left side where the rear would be on the right?

 

[markboris]

Driver's side right rear?

For clarity, the standard used for references to location, direction or orientation are as if sitting in the driver's seat. So 'driver side' = left side. Driver's side rear would be left rear. 'Passenger side' = right side. Passenger side front tire would be right front. Etc.

Presumably 'driver's side Right Rear' is from the reference point of standing outside the vehicle facing its left side where the rear would be on the right?

Peter is in the UK and the driver's side is on the Right side of the car.

 

[Ford_orr]

My heights are uneven also. When I was doing pre-Rally springs/Eibach sway bars mod height measurements I noticed it. Thought, well that's weird. Then I thought, after everything's installed, it'll sort itself out. Nope, still uneven.

 

[markboris]

My heights are uneven also. When I was doing pre-Rally springs/Eibach sway bars mod height measurements I noticed it. Thought, well that's weird. Then I thought, after everything's installed, it'll sort itself out. Nope, still uneven.

How much is yours off in the rear? Before and after my rally springs the left side is about 1/4” lower than the right. Fronts are equal. 1/4” really isn’t much but it’s something.

 

[Ford_orr]

How much is yours off in the rear? Before and after my rally springs the left side is about 1/4” lower than the right. Fronts are equal. 1/4” really isn’t much but it’s something.

I'm exactly a 1/4" higher - front and back - on the passenger side. If I remember correctly, I think it was almost 1/2" difference pre-suspension mod. It was definitely more than a quarter, cause it stood out to me. I don't think a quarter I would've noticed too much.

 

[markboris]

I'm exactly a 1/4" higher - front and back - on the passenger side. If I remember correctly, I think it was almost 1/2" difference pre-suspension mod. It was definitely more than a quarter, cause it stood out to me. I don't think a quarter I would've noticed too much.

I have measured every time I replaced springs in my 3 Mach-E's and also the 12 cars I have installed Rally springs and every single one is different. There has not been one Mach-E that was exactly the same ride height or was perfectly even left to right, front to rear. When people ask me how much the car will be lifted or lowered, I tell them I have no idea because it is never consistent.

 

[HuntingPudel]

It's likely manufacturing tolerances for the various suspension parts adding up. The mounting points at the frame, load bearing control arms, suspension uprights, springs, spring perches, where and how you take the measurements (car manufacturers generally take the measurements at specific points on the frame - if you take measurements at body panels, you're introducing the mounting of the body to the frame as a variable), etc. all have an effect on the ride height at a given corner and the wheel loading. If you really want to be precise on the suspension, weigh the car using wheel scales to see if the cross weights line up (that is, the sum of the RF + LR weights roughly equals the sum of the LF and RR weights). If the cross weight containing the corner that is too high is greater than the other cross weight, the rear springs likely should be swapped since the car will probably want to understeer in one direction and oversteer in the other direction when pushed to the limit (unlikely to see this given how soft the springs are, but possible).

Or if you never drive at 95%-98%, and the height difference bugs you put a short spacer in the corner that is low.

 

[Teslaeata]

Out of interest, are you waiting until the weight’s back on the wheels before tightening the fixings? Or tension in bushing etc may be affecting ride height, otherwise, is this something to get excited about anyway especially as sitting in the car will affect ride height as does braking, cornering etc

Often people froth about things which make five eights of nothing of a difference to anything.

 

[markboris]

Out of interest, are you waiting until the weight’s back on the wheels before tightening the fixings? Or tension in bushing etc may be affecting ride height, otherwise, is this something to get excited about anyway especially as sitting in the car will affect ride height as does braking, cornering etc

Often people froth about things which make five eights of nothing of a difference to anything.

I tighten suspension when on the ground at ride height.

 

[Teslaeata]

I tighten suspension when on the ground at ride height.

Good man

Do you do to one side same as the other, too?

 

[markboris]

Good man

Do you do to one side same as the other, too?

Not sure what you mean by that. I have a lift in the garage which supports the frame and the car is up at eye level when I work on the suspension. When I am done, I leave all fasteners loose and drop the car down, take it for a very short ride out the driveway, down the street and back so that everything settles at ride hight. Then I drive it up on my ramps (front, then rear) and tighten the suspension.

 

[Teslaeata]

Not sure what you mean by that. I have a lift in the garage which supports the frame and the car is up at eye level when I work on the suspension. When I am done, I leave all fasteners loose and drop the car down, take it for a very short ride out the driveway, down the street and back so that everything settles at ride hight. Then I drive it up on my ramps (front, then rear) and tighten the suspension.

I mean change right rear spring - change left rear also, change left rear shocker - change right rear also and so on…….

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