2015 Toyota Van Car pulls left

Tiny
AILERON
  • MEMBER
  • 2015 TOYOTA VAN
  • FWD
  • AUTOMATIC
I've done with my alignment but car still pulls to the left.
Before alignment done car is already pulling left with even front camber and caster.
After alignment.
Front reading is
Camber left -1°0' right 0'
Caster left 6°10' right 5°0'
Rear is torsion beam is within acceptable range angle.
Swapped tyres and even air pressure. Can feel the steering pulling left while driving so it's not the crooked steering wheel.
Please help.
Thanks.
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Monday, December 7th, 2015 AT 6:14 PM

4 Replies

Tiny
CARADIODOC
  • EXPERT
You DO have a real high camber pull to the right and a significant caster pull to the right, you either have a tire pull or a locked brake. The vehicle is too new to have a brake problem, and you already switched the tires, I assume from right to left, not front to rear. If you did front to rear, you could have two tires causing a pull.

The next thing to look at on the printout is "Steering Axis Inclination, (SAI). That has to be exactly equal on both sides. There's no spec given; just that they're the same, within about 0.2 degrees. SAI will change if the cross member is shifted to one side as little as 1/16". Readjusting the incorrect camber will fix camber but not SAI, which can also cause a pull along with miserable handling.
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Monday, December 7th, 2015 AT 6:26 PM
Tiny
AILERON
  • MEMBER
Hi. Thanks to your fast reply. Camber and caster is set as to counter the left pull but it's still pulling left instead of going right. SAI was said to be acceptable too.
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Monday, December 7th, 2015 AT 6:50 PM
Tiny
CARADIODOC
  • EXPERT
The only other two things I can think of are excessive rear thrust angle and excessive camber settings to the right.

At first excessive camber is counter-intuitive, but while we know a tire wants to pull in the direction it's leaning, if it's bad enough, the vehicle's weight will want to make the bottom of the tire want to sit flat on the road surface. To do that, the left tire would have to tilt to the left relative to where it is now. This is typically a problem with really wide tires.

I'm not sure on your printout, (thank you for including that), but from what I can see, it looks like rear thrust angle isn't excessive. I had two trucks years ago that pulled to the right. Both had camber and caster that were perfect and not easily adjustable. The only thing I could find was a slight rear thrust angle with both wheels turned slightly to the right. I ground on the leaf spring spacers to allow me to move the left side of the axle back a little. That was enough to eliminate the pull. These were rear-wheel-drive trucks and the thrust angle apparently was pulling the entire truck to the right. I've had other similar trucks with worse thrust angle that never had a problem.

At the moment I don't have a better answer, but I'll keep thinking on it.
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Monday, December 7th, 2015 AT 7:32 PM
Tiny
AILERON
  • MEMBER
Mine is a fwd.
Thanks a lot for helping.
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Monday, December 7th, 2015 AT 8:20 PM

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