Axle & differential error (post wheel alignment) - GR Supra 2023

[sh3hryar]

Here is the background:

5th July
I got below parts installed on the car:
rear traction links
rear toe links
rear upper arms

Perfect fitting, everything went smooth.
Car's alignment got screwed, which was expected.

10th July
took the car for the wheel alignment. post alignment, as soon as I reversed the car from the ramp, the rear left wheel starts scrubbing the body.
this has never happened before. even with the car being lowered on H&R springs, i have never had tyre scrubbing the body.

visually, I see the space between the rear left wheel and the body is different to the rear right wheel. see the picture below.
gap at point A (between tyre thread and body arch), gap at point B (between tyre thread and body arch) and gap at point C (between tyre thread and body arch) is not same as rear right wheel.

it looks like the car's tyre is moved out of its original position.

the car is giving me two errors. i cant recall the error messages on the computer...one error says something about "axle" and the second error had something to say "rear differential lock "and asking to take the car to the dealership.

What went wrong with my car?

Its a 2023 Toyota Supra 3.0 MT.

PS. I left my car at the workshop and I dont have a picture of the rear wheel, so I have used random picture to explain the gaps.

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[tracer bullet]

You mentioned that you got the parts installed on the car, and that you reversed it off the ramp. Who did the actual work on the car?

Maybe it doesn't actually matter, but I am wondering if something got massively messed up during the alignment? If one side is dramatically different than the other, I'd get it back up in the air and start comparing the 2 sides. Is one of the adjustable parts seeming to be all of the way out or all of the way in, where you might expect it to be somewhat in the middle of the adjustment range? Is one side all the way out and the other side all the way in?

 

[razorlab]

Sounds like a crappy shop did a crappy install. I bet they didn’t measure the OEM arms and didn’t set the aftermarket arms the same as a baseline.

It’s fairly common sense, but we all know how that goes with some people.

 

[sh3hryar]

You mentioned that you got the parts installed on the car, and that you reversed it off the ramp. Who did the actual work on the car?

Maybe it doesn't actually matter, but I am wondering if something got massively messed up during the alignment? If one side is dramatically different than the other, I'd get it back up in the air and start comparing the 2 sides. Is one of the adjustable parts seeming to be all of the way out or all of the way in, where you might expect it to be somewhat in the middle of the adjustment range? Is one side all the way out and the other side all the way in?

got the parts installed at local workshop, specialists on German cars. No issues after the installations.

the issue started after wheel alignment..

the camber and toe were matching on both sides.. could it be something to do with caster?

 

[sh3hryar]

Sounds like a crappy shop did a crappy install. I bet they didn’t measure the OEM arms and didn’t set the aftermarket arms the same as a baseline.

It’s fairly common sense, but we all know how that goes with some people.

if the shop didn't install properly and now the OEM are off the car, what is the best way to correct the situation?

 

[razorlab]

if the shop didn't install properly and now the OEM are off the car, what is the best way to correct the situation?

Measure OEM hole to hole and set the aftermarket arms the same length as a baseline. They should have done that to begin with.

The toe and traction arms are probably not equal lengths on each side. That would pull the wheel closer/further from center point as you are describing.

 

[sh3hryar]

Measure OEM hole to hole and set the aftermarket arms the same length as a baseline. They should have done that to begin with.

The toe and traction arms are probably not equal lengths on each side. That would pull the wheel closer/further from center point as you are describing.

thanks!

 

[sh3hryar]

does anyone know how to clear the errors on the dashboard?

do I need to take the car to the dealership?

 

[Rocksandblues]

can clear the errors with a lot of different obd tools and software. make sure the level arm sensor is level and intact after alignment guys....

 

[itzTang]

installation was screwed but how did the alignment guys not catch it lol. even the post specs should show something off.

 

[razorlab]

installation was screwed but how did the alignment guys not catch it lol. even the post specs should show something off.

You can still have balanced toe and camber with the centerlines being shifted. Depends on the alignment machine. If it isn't triangulating all four or measuring centerline front to back, you wouldn't see it in the specs.

The dynamics of the car would be SUPER wack when driving though.

 

[sh3hryar]

Situation update:

All SPL parts were installed correctly on the vehicle.

The wheel alignment shop messed up my car.
You may ask, what went wrong?

The moron who did the alignment on the car had no clue on what he was doing. He messed up the caster on rear left wheel. The wheel was moved ~1 inch ahead. This made the tire rub the wheel arch.

Yes I have read and I am told caster settings are not adjustable on the Supra. I REALLY dont know how and what exactly did he do to eff my car so much - BUT he did it!

As for the solution, I am seeking relaible solution to get the wheel back into the factory position.

 

[razorlab]

Situation update:

All SPL parts were installed correctly on the vehicle.

The wheel alignment shop messed up my car.
You may ask, what went wrong?

The moron who did the alignment on the car had no clue on what he was doing. He messed up the caster on rear left wheel. The wheel was moved ~1 inch ahead. This made the tire rub the wheel arch.

Yes I have read and I am told caster settings are not adjustable on the Supra. I REALLY dont know how and what exactly did he do to eff my car so much - BUT he did it!

As for the solution, I am seeking relaible solution to get the wheel back into the factory position.

I literally told you the solution. The caster is messed up because of the arm lengths. That is the only way for the caster to be messed up in the rear.

Alignment guy changed the lengths too much.

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