Brakes not quite right after repair

[Full-Timers]

A little while back I had new rotors and pads put on my W22. I used to be able to brake to a complete stop using nothing more than my big toe (I always drive barefoot).
Now it takes more foot pressure. Possible they need to break-in? Also I notice when coming to a stop at slow speeds sometimes I get a grinding/vibration in the brakes. I am hoping they will hold out until the caliper recall so I can get it fixed right by Redlands Truck and RV next time.

[DriVer]

Quote:

Originally Posted by Full-Timers A little while back I had new rotors and pads put on my W22. I used to be able to brake to a complete stop using nothing more than my big toe (I always drive barefoot).

I drive barefoot as well but when I changed my brakes I didn't notice the "big toe" effect. I do know one thing that when I say "Whoa!" that Dubya deuce deuce will stop on a dime and give me some change.

Quote:

Also I notice when coming to a stop at slow speeds sometimes I get a grinding/vibration in the brakes. I am hoping they will hold out until the caliper recall so I can get it fixed right by Redlands Truck and RV next time.

What you have there is an ABS sensor failure. I experienced the very same event at low speed before stopping the brake pedal would pulse and vibrate and then grab all under 5 MPH. The sensor failure doesn't show up as a lit ABS lamp either on the IP. Weird!

[gonzo]

And I thought I am the only one driving with my big toe only. I have to add the I wear shoe size 15 so my big toe is probably the size of a regular size 10 foot.

[Full-Timers]

Quote:

Originally Posted by DriVer What you have there is an ABS sensor failure. I experienced the very same event at low speed before stopping the brake pedal would pulse and vibrate and then grab all under 5 MPH. The sensor failure doesn't show up as a lit ABS lamp either on the IP. Weird!

Is there a way I can check that?

[sknight]

If there is an ABS failure the indicator light on the dash should come on indicating a trouble code.

If it was just done then you're experiencing the results of poor machining technique and improper test driving. Basically the brakes weren't bedded in properly. They should come around in time, and if they don't then I'd be on the phone with whomever did it.

[DriVer]

Quote:

Originally Posted by Full-Timers Is there a way I can check that?

The problem only manifests itself in the terminal phase of coming to a complete stop. The event typically lasted from 2 to 3 seconds right before wheel stop at speeds of less than 5 MPH. I was told by an engineer that what I was experiencing was a sensor anomaly via a bad sensor. Since the ABS lamp was not lit, my ABS system was working OK.

In my case, all 4 sensors were replaced and the problem disappeared and has not repeated in over a year. If it were me, I would try replacing the front 2 sensors first "OR" if you know that a sensor got hot on a rear caliper, I might change out the sensors on that axle.

Since I did not witness the diagnostics first hand, I can't suggest what to test for however I know what the problem was and what the fix was. I'm just sharing what worked for me. Hopefully you'll catch it on the first try.

If your symptoms are the same as mine I expect that the fix would also work for you as well. I would be reluctant to throw money at a problem since we're both most likely retired however I believe it'll fix the problem.

You might choose to wait for the campaign to launch if it's not too much of a problem for the moment.

[oemtech]

You can get the ABS sensors from OEM-Engineering

[Full-Timers]

DriVer,
When your sensors were bad, did you experience the vibration every time you came to a slow stop or just once in a while? Mine doesn’t do it every time. I have never been one to just throw parts at it until it goes away and as you say being retired, it’s just not cost effective to do so. It doesn’t seem to be a big problem right now so I think I may just wait for the recall to get it all checked out. Thanks for your help.

[DriVer]

Quote:

Originally Posted by Full-Timers DriVer, When your sensors were bad, did you experience the vibration every time you came to a slow stop or just once in a while?

Not absolutely every single time because I did not bring the vehicle to a stop in the same manner repeatedly. That said IF I tried to recreate the event, it wasn't hard to do.

[Full-Timers]

If a service center replaces brake parts and Workhorse pays the bill, do they have to be OEM Workhorse parts? I don’t know for sure, but I am pretty sure the service center that replaced my rotors and pads got them from Car Quest.

[DriVer]

Quote:

Originally Posted by Full-Timers If a service center replaces brake parts and Workhorse pays the bill, do they have to be OEM Workhorse parts? I don’t know for sure, but I am pretty sure the service center that replaced my rotors and pads got them from Car Quest.

If your repairs were accomplished, out of warranty, I expect that the service center might purchase parts locally if it can get their customer back on the road quickly. I have had several parts purchased at the local NAPA that were installed on my motorhome - customer pay.

I am thinking that under any part of the Interim Notice and the official recall that all the parts that are used should be coming directly from Uptime Parts. (always a disclaimer that if the parts are not available through Uptime that they might go local if they can)