Car pulls to the right under hard braking

[scullyg40]

My car pulls to the right under hard braking. I can manage it with a little correction through the steering wheel, but it's not confidence inspiring.

My brake setup is pretty basic, Ferodo DS 1.11 brake pads and Brembo HC disks at the front with braided brake lines. The rear is stock. I replaced the left rear caliper a while ago. All the lines are stock, and ABS is present and functional.

Who can give me some guidance as to where to look, my first thought was to replace the 3 remaing calipers, but there probably is an easier and cheaper way to solve this right?

 

[JamesBryan]

Check the slider pins are free to move on the fronts.

 

[scullyg40]

Will do. Do I grease them with some sort of grease? What type?

 

[JamesBryan]

Will do. Do I grease them with some sort of grease? What type?

Usually silicone grease that comes with caliper rebuild kits.

Or CV grease will work if you have that.

 

[Usr117063]

Your right front camber is 0.6 deg less than left and did you get the car corner balanced?

 

[scullyg40]

True, in my project page, that is what it shows, but as the alligner was setting the toe, it changes constantly, and at the moment of the picture, the difference was the most extreme. But there is a difference in the camber, for sure.
I didn't get the car corner weighed.

 

[Usr117063]

Im surprised that was the most that could be had tbf.

 

[scullyg40]

Yeah, me too.

 

[Usr117063]

Is it loose under braking or just pulls to the right?

 

[scullyg40]

Don't really know what you mean with loose under braking, but it's pulling to the right, and I have to correct of with the steering wheel.

 

[M90SR]

Don't really know what you mean with loose under braking, but it's pulling to the right, and I have to correct of with the steering wheel.

Left hand rear caliper.

Check that the pip on the back of the pad is correctly located in the slot on the piston, as otherwise the pad will sit at an angle to the disc, and not make a proper even contact.

Been there, got the T shirt.

 

[Robbie Corbett]

Check the slider pins are free to move on the fronts.

This I think is what was causing mine to pull to one side under heavy breaking. I've just stripped the calipers down and sure enough one caliper had one basically seized slider.

Rob,

 

[scullyg40]

Check the slider pins are free to move on the fronts.

Left hand rear caliper.

Check that the pip on the back of the pad is correctly located in the slot on the piston, as otherwise the pad will sit at an angle to the disc, and not make a proper even contact.

Been there, got the T shirt.

I checked both suggestions. Spider pins were moving freely, regreased them. And the brake pads are in the right position in the rear. We'll see how it goes at Assen next Saturday.

 

[Robbie Corbett]

Track rod ends and lower arm bushes all good?

 

[scullyg40]

All pretty much new.

 

[Robbie Corbett]

Hmmm weird. Well hope its sorted its self out! Enjoy Assen! Fair old trip - Rode up with a group of mates a few years back to see the moto GP, epic looking track as a spectator.

 

[scullyg40]

The MotoGP is definately worth a visit, think it's pretty much sold out year in, year out. The campsites around the track are also fun. 😁