Replaced pads and rotors, brake pedal sinking to floor now?!?

[UniqueTII]

That's bizarre. The PowerStop pads I installed on my 2010 had those tabs. What part # did you order for your truck?

I got the K5577 kit, so the front pads are Z232087.

 

[mjp2]

I got the K5577 kit, so the front pads are Z232087.

View attachment 39045

I'd take it up with Powerstop or your retailer. Those pads were improperly packaged.

https://www.summitracing.com/parts/pwr-k5577

 

[UniqueTII]

I'd take it up with Powerstop or your retailer. Those pads were improperly packaged.

https://www.summitracing.com/parts/pwr-k5577

I think Summit just needs to update their image to reflect the change made by PowerStop. The individual pads have the new design pictured.

 

[mjp2]

Ooh that sucks. Never good to see a once-quality product go downhill.

 

[07navi]

My brakes have those tabs

 

[Langer]

@UniqueTII Did you ever get to the bottom of this?

 

[Yupster Dog]

@UniqueTII Did you ever get to the bottom of this?

post #82 this thread.

 

[UniqueTII]

post #82 this thread.

Yep, everything still works great after swapping out the pads again!

 

[1970Maverick]

So after reading all the posts can anyone explain why the "tabs" make a difference that would cause a spongy pedal going to the floor?

 

[jruppert]

I apologize for bringing this back from the dead, two years later. UniqueTII, what is your long term assessment of the situation? I bought a 15 Expedition back in May. Brakes didnt feel that great. Dealership said rotors were turned. I found the same exact issue you showed in that picture where there was half the rotor showing contact. I thought they machined wrong. I installed Powerstop rotors and pads in the front. Soon after installing, I began having pedal issues. I have replaced the master cylinder and swapped out ABS pump with no resolve. I am at my wits ends with this issue. I have bled and bled and bled those brakes and have the sinking pedal problem. I do not recall there being tabs on my pads. I just may have to swap them out. Seems like a crazy reason but after reading this post, I am starting to wonder.