Pulling to the right

[TX99517]

The three topics I found are not the same issue.
Son has a 99 TJ. I already had all brakes(front/back) serviced and parts replaced to include rotors/drums.

It continues to pull right when brakes are applied. He’s currently taking automotive mechanics in college and in class he put a new caliper on. Still doing it. He does have new one for other side as well. He’s getting a little frustrated.

When I had it serviced, the right side had completely locked up and warped the rotor. Is there something else that is being missed?

 

[Steve04]

I would replace both front brake hoses, most likely something wrong with the right side but I would replace both

 

[TX99517]

I would replace both front brake hoses, most likely something wrong with the right side but I would replace both

Thanks, I’ll let him know to check that. I believe his instructor mentioned changing brake lines.

 

[NskLJ]

Thanks, I’ll let him know to check that. I believe his instructor mentioned changing brake lines.

Rubber brake lines can collapse internally causing he brake fluid pressure to stay in the caliper. If one is bad replace them both. Then Bleed the system.

 

[Artsifrtsi]

I agree with the brake line option too. Mine finally collapsed earlier this year, causing the front right to drag. Replaced them, and no issues at all since.

 

[TX99517]

I have shared with him all this. Thanks. He plans to get new lines and replace them.

 

[CharlesHS]

Even though the rotors and brake pads have been replaced what is the condition of the caliper.
There may be rust debris remaining inside causing the caliper piston not to retract when it gets warmed up.

 

[mrblaine]

Thanks, I’ll let him know to check that. I believe his instructor mentioned changing brake lines.

A good instructor would have taught him how to diagnose the problem rather than shotgunning parts at it.
When a single side is dragging or locked up, pull the tire and open the bleed screw. If the rotor is released by the caliper, then it is upstream of the caliper. If it doesn't release, then it is something in the caliper.

 

[TX99517]

A good instructor would have taught him how to diagnose the problem rather than shotgunning parts at it.
When a single side is dragging or locked up, pull the tire and open the bleed screw. If the rotor is released by the caliper, then it is upstream of the caliper. If it doesn't release, then it is something in the caliper.

He’s in an intro class right now. Next semester they will start getting into more detailed stuff.

But I agree. The right caliper he said was shot so it needed replaced. The pads were fine.

 

[LONGJP2]

My thought is if it's pulling right (when braking), then it's the left side that's not working properly.

 

[mrblaine]

My thought is if it's pulling right (when braking), then it's the left side that's not working properly.

Way too many variables to accurately predict that.

 

[Artsifrtsi]

My thought is if it's pulling right (when braking), then it's the left side that's not working properly.

In reference to front brakes only, on a flat road... if it pulls right, the right brake is biting harder than the left. Could be that the left is doing nothing to very little... could be the right is biting harder for some reason.

When you add in the rear brakes, it should be the same way, until you have off things happening on both ends.

 

[TX99517]

Wanted to update. He put new calipers on both sides. He was prepared to replace the brake lines as well, but he has told me the problem is not occurring as of now. Hopefully it fixed the issue. He will keep an eye on it and diagnose it further if needed. Thanks for the input.

 

[CharlesHS]

Thank you for the update.