steering wheel jerks under braking - Ford Powerstroke Diesel Forum

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post #1 of 32 Old 11-18-2012, 07:26 AM Thread Starter
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steering wheel jerks under braking

So when I hit the brakes my steering wheel jerks right. Stuck caliper or something else? I have done brakes many times on cars but never on a truck (excursion). Easy to fix?
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post #2 of 32 Old 11-27-2012, 09:07 PM Thread Starter
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update

so I replaced the pads, clips, and springs as well as lubricated the pistons, sliders, and boots with caliper grease and the issue still exists. I also flushed the system and refilled with DOT 4 fluid. The vehicle still pulls right under braking.

Am I missing anything?

Next step will be new calipers (SSBC) with new pads and braided brake lines. I plan to keep stock rotors.

Thoughts?

Also, I noticed 3 lines near the hub (brake line into caliper, 2 others-one is rotted); Are the other 2 lines for 4x4???
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post #3 of 32 Old 11-28-2012, 01:19 AM
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I've seen proportioning valves cause this but rare. Most likely the caliper so your on the right track I believe.


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post #4 of 32 Old 11-28-2012, 05:32 AM
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check the flex line to the caliper. I have seen these on other cars swell shut causing the symptom you describe.

SM


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2000 Excursion Limited 4x4
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f250 "V" code front and "B" code rear springs
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post #5 of 32 Old 12-02-2012, 06:47 PM
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I had the same problem and the inner tie rods were bad.
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post #6 of 32 Old 01-18-2013, 07:35 AM Thread Starter
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update - still have pull under braking

So here is a quick update on my situation:

I was experiencing a hard pull (right) under braking and assumed it was my brakes. So I changed my brake pads with all new clips and lubricated the slider pins and piston boots. This did not fix the problem. Next, I replaced my front brake calipers with an SSBC big brake kit, flushed fluid and added new DOT 4 fluid, and installed SS braided brake lines in the front. This did not fix the problem. The rotors look brand new and have plenty of material still so I did not replace. Next, I looked into the suspension, thinking I may have some weak spots in my suspension causing the pull. I had installed a 4” Pro-Comp lift kit (complete with shocks, front springs, add-a-leaf rear spring, dropped pitman arm), dual steering stabilizer kit, Hellwig rear sway bar kit, and warn premium hubs. I also had the suspension shop check the ball joints, tie rod ends, drag link, front sway bar, steering box, etc. and align. They said all looked fine except for some play in the steering box. None of these suspension upgrades fixed the brake pull problem. What is weird is that the shop installed a ball joint cam to adjust the caster and the brake pull still occurs, only now to the LEFT. Next, I had the steering box replaced at the dealership. I also had the dealership check the ball joints, tie rod ends, drag link, front sway bar, wheel bearings, etc. and align. Dealership said all looked fine. The new steering box fixed my slight road wander and constant steering wheel adjustment, but brake pull (left) still exists. I have a firm pedal so I assume my booster and master cylinder is good. I do not have any brake vibration/shutter so I assume my rotors are good. I have not looked at my rear brakes yet. I have no CEL codes/lights. It seems like the pull worsens as the brake system gets warmer.

I don’t know what to look into next…. Any ideas?? What am I missing??

My Excursion is a 2001 4x4 with ~60k miles.
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post #7 of 32 Old 01-25-2013, 03:59 PM Thread Starter
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Pull changed sides today

So here's a quick update. The brake pull has changed sides today!

I decided to get my stock rotors turned at a brake shop today as well as my recently installed pads sanded Thinking that it was worth a shot to see if this would solve my Brake pull. As soon as I left the brake shop and bedded in the brakes, the brake pull became Extremely noticeable – this time to the right!

This is good news, I think? I believe this tells me that the pull is not hydraulic in nature but based on the friction characteristics of the pad and rotor.

I purchased a new set of powers stop Cryo rotors and will install them tomorrow and hopefully this will fix my issue.
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post #8 of 32 Old 01-26-2013, 12:45 PM Thread Starter
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Picture attached

I've attached a picture of the new rotors installed.
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post #9 of 32 Old 01-26-2013, 01:45 PM
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Nice set up. What was the estimated price for your set up. Did you change anything in the rear? Let us know the results as well.

Chris
1984 F-350 XLT 4x4 4spd. 6.9 (project)
1996 F-250 XLT 4x4 5spd. 7.3
2001 Excursion XLT 4x4 Auto 7.3
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post #10 of 32 Old 01-26-2013, 03:11 PM
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Quote:
Originally Posted by explosionFTL View Post
so I replaced the pads, clips, and springs as well as lubricated the pistons, sliders, and boots with caliper grease and the issue still exists. I also flushed the system and refilled with DOT 4 fluid. The vehicle still pulls right under braking.

Am I missing anything?

Next step will be new calipers (SSBC) with new pads and braided brake lines. I plan to keep stock rotors.

Thoughts?

Also, I noticed 3 lines near the hub (brake line into caliper, 2 others-one is rotted); Are the other 2 lines for 4x4???
the "rotted" line is likely the vacuum line for the automatic hubs. the hubs on my ex were changed out to manual warn hubs sometime before I bought it.

SM


like a boss 3 by bmonkey36, on Flickr

2000 Excursion Limited 4x4
heated and power everything
7.3 ltr auto
f250 "V" code front and "B" code rear springs
KYB shocks
billet grill
aftermarket headlights
beans chip with;
1: stock
2: high idle
3: economy
4: tow
5: exhaust brake
6: no start
Big Boost
Ford Powerstroke severe duty air intake AIS
WWII
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