Excessive negative camber on my rear wheels

suspension shop?

 

Being it affects both wheels, I would suspect that the rear cross member has failed.

 

Take the wheel off, see if anything looks odd? <Sorry, see you've been there.

Anyone else driving it?

 

How many thousands of pounds of cargo do you have in the trunk ?

Some tire shops and many body shops likely can give you good analysis
of what is causing this.
probably something in the suspension going bad.

 

I've noticed some side-to-side disparity on our gen 3, doing the same test:

Left side: 1/4"
Right side: 1"

My rough geometry calc with those measurements say we are outside spec, both for amount and disparity between sides. Still, tires are wearing ok, and it's been thus for years, so I leave it be.

But over 2" (your case) is likely way out-of-spec (I don't have the specs for Prius c). Take it into dealership, get their opinion? Yeah I know...

 

You often can get MUCH better service on things like this from a good body shop instead of a half-assed dealers shop.

By a "good body shop" I mean one that is big enough to do things like frame straightening, not a guy down the street
who paints cars in his back yard.

 

glad you found it! i'm surprised you're getting so much rust in kentucky

 

Man!! your lucky that wheel didn't fly off - going down the highway or on a hard turn. While the car's down; I'd probably rip into the other side and check it. Have you ever jacked the car up, one corner at a time - somehow placing enormous pressures on that part? It was probably a bad factory wield that was missed during QC.

You should check online- junkyards and body parts stores. Since it's a chunk of metal, they should be able to ship it to you.

 

Again, if someone could come up with a non-corrosive snow melter, they'd deserve a Nobel Prize, or similar accolade. Besides automotive-specific concerns, dumping truckloads of salt in the environment ain't the greatest.

Hey Musk, something worthwhile to get behind?

 

done:

1,280 × 720

 

Sorry for the thread hijack, one more: sprinkle snow/ice with something more benign, and pitch black. To absorb sunlight, heat up. Dumb idea, especially at night, but something's gotta be better.

 

pepper?

 

Yes, the Yaris is compatible - international platform.

If your into modifying your car, Lexus CT200H has rear disk brakes that your should be able to move over to your car.
You can also just install the cruise control stalk and nip the plastic cover. You may also have to install a fuse too, to get cruise control working on your car.

 

adding my two cents: Some people are using carpenter square at the tire base and measuring the offset in plumb by measuring from the top of the tire to the top of square. this is flawed as the tire bulges out at the bottom somewhat due to the weight of the car. You can move the square left or right of the wheel axle, away from the "bulge" for a more accurate measurement, even though this whole thing is a crude way to measure camber anyway!

My crude measurements show about 1 degree of negative camber, which is surprisingly noticeable from about 20 feet behind the car and eyeballing it. This all started when I was very carefully inspecting my "new", used 2014, which I just picked up this week. I may take it in for a real alignment measurement, or just live with it. I will inspect the trailing arm beam though in the next day or so, even though I doubt it's a rust issue. But this thread was greatly appreciated!

I'm just surprised at how visible to the naked eye 1 degree is! And both sides were roughly the same negative camber.

For those wanting to actually measure this, the formula is something like this:

camber = arctan (offset/height)

So:

1. offset = distance from top tire wall to top of square (very small number hopefully, like 1/4")
2. height = distance from ground to the point you measured item 1. (around 17-19")
3. divide those two numbers and then find the arctan of that, using a website like this:

Arctan Calculator (math.net)

PS - now I'm going to be eyeballing any other Gen3 Prius I see in the parking lot to get a sanity check!