JLUR pulling to one side when braking

[USCG SARdog]

Hi all,

My wife and I bought a 2019 JLUR from a Jeep dealership back in September. The Wrangler was a Certified Pre Owned vehicle with 26K miles on it. I did not purchase an extended warranty, so the vehicle is outside of the 3 month CPO warranty. On the CPO inspection/service report, it shows that the front rotors, front pads, and left front caliper were replaced. I can visually confirm that the parts listed look new. I can also confirm that the brake calipers are different colors, but physically look similar.

The problem that I am having is that when you get on the brakes a little aggressively, the vehicle immediately pulls to the left, then within a half second or so, the pull balances out. The pull isn’t horrible, but it’s enough to require steering input to the right to counter the pull to keep the vehicle tracking straight. When the pull balances out, you have to steer back to the left to maintain a straight path.

I am suspicious of the fact that only the left front caliper was replaced. My theory is that the new caliper somehow has more stopping power than the original caliper on the right front. I have always replaced both brake calipers on an axle as a standard practice to ensure balanced braking performance and have never experienced this kind of issue.

I am also aware of the collapsing brake line issue on the Wranglers, so I am wondering if that could cause the left pull/delayed balance issue I am experiencing. It seems odd that the pull balances out, which to me might indicate a collapsed brake line delaying the flow of brake fluid to the caliper.

I’m not one to fire the “parts cannon” right away as I prefer to diagnose the root cause of the problem. Has anyone here experienced this type of problem with the brakes on your Wrangler, and if so, what was the diagnosis?

Thanks in advance for your input!

-Rob

Sponsored

 

[Old Dogger]

Since it is pulling to the left, most likely your issue is being caused by a defective right front caliper.

 

[Barney392]

Hi all,

My wife and I bought a 2019 JLUR from a Jeep dealership back in September. The Wrangler was a Certified Pre Owned vehicle with 26K miles on it. I did not purchase an extended warranty, so the vehicle is outside of the 3 month CPO warranty. On the CPO inspection/service report, it shows that the front rotors, front pads, and left front caliper were replaced. I can visually confirm that the parts listed look new. I can also confirm that the brake calipers are different colors, but physically look similar.

The problem that I am having is that when you get on the brakes a little aggressively, the vehicle immediately pulls to the left, then within a half second or so, the pull balances out. The pull isn’t horrible, but it’s enough to require steering input to the right to counter the pull to keep the vehicle tracking straight. When the pull balances out, you have to steer back to the left to maintain a straight path.

I am suspicious of the fact that only the left front caliper was replaced. My theory is that the new caliper somehow has more stopping power than the original caliper on the right front. I have always replaced both brake calipers on an axle as a standard practice to ensure balanced braking performance and have never experienced this kind of issue.

I am also aware of the collapsing brake line issue on the Wranglers, so I am wondering if that could cause the left pull/delayed balance issue I am experiencing. It seems odd that the pull balances out, which to me might indicate a collapsed brake line delaying the flow of brake fluid to the caliper.

I’m not one to fire the “parts cannon” right away as I prefer to diagnose the root cause of the problem. Has anyone here experienced this type of problem with the brakes on your Wrangler, and if so, what was the diagnosis?

Thanks in advance for your input!

-Rob

I had a JK that did the same. After doing an ABS bleed the problem was gone. To involved to go into it here but search for it for more info.

 

[USCG SARdog]

Since it is pulling to the left, most likely your issue is being caused by a defective right front caliper.

Yes, I was thinking that as well. The right side caliper was not replaced during the CPO inspection. My OCD is telling me to replace both calipers so I have a matching set.

 

[USCG SARdog]

I had a JK that did the same. After doing an ABS bleed the problem was gone. To involved to go into it here but search for it for more info.

Great info, thank you for that. I can do the ABS bleed with JScan I believe. That prob wasn’t done at the dealership when the parts were replaced. Go figure.

 

[JL 2D]

I would take all the brakes off and service them. If it’s a new to me jeep with a pulling issue, I would assume it wasn’t done properly and fully clean and lube the brakes correctly, then bleed it.

 

[PotterJLUR]

Brake hose is causing the issue

 

[ErAcEr]

Rob,

I had an issue with my left front caliper sticking on my 2018, but time does not care about mileage due to brake fluid being hygroscopic. As a lot of us are aware of the lines possibly going bad, and I haven't looked at the manual for the specific fluid change interval but google search says 2-3 years. So when my issue happened I had a shop do a flush/fill for all calipers. This solved my issue and then i upgraded to some powerstop pads and rotors because of the possible warping of the rotor due to heat. Also when that bad/old fluid flowed through the ABS module it triggered a host of service 4x4, brake pedal, and abs codes for me.

So my take would be to start with the fluid flush first before loading the parts cannon as well.

Hi all,

My wife and I bought a 2019 JLUR from a Jeep dealership back in September. The Wrangler was a Certified Pre Owned vehicle with 26K miles on it. I did not purchase an extended warranty, so the vehicle is outside of the 3 month CPO warranty. On the CPO inspection/service report, it shows that the front rotors, front pads, and left front caliper were replaced. I can visually confirm that the parts listed look new. I can also confirm that the brake calipers are different colors, but physically look similar.

The problem that I am having is that when you get on the brakes a little aggressively, the vehicle immediately pulls to the left, then within a half second or so, the pull balances out. The pull isn’t horrible, but it’s enough to require steering input to the right to counter the pull to keep the vehicle tracking straight. When the pull balances out, you have to steer back to the left to maintain a straight path.

I am suspicious of the fact that only the left front caliper was replaced. My theory is that the new caliper somehow has more stopping power than the original caliper on the right front. I have always replaced both brake calipers on an axle as a standard practice to ensure balanced braking performance and have never experienced this kind of issue.

I am also aware of the collapsing brake line issue on the Wranglers, so I am wondering if that could cause the left pull/delayed balance issue I am experiencing. It seems odd that the pull balances out, which to me might indicate a collapsed brake line delaying the flow of brake fluid to the caliper.

I’m not one to fire the “parts cannon” right away as I prefer to diagnose the root cause of the problem. Has anyone here experienced this type of problem with the brakes on your Wrangler, and if so, what was the diagnosis?

Thanks in advance for your input!

-Rob

 

[wibornz]

The dealer did a shit job. When replacing brake calibers, and rotors, you all should do both sides together.

Sponsored