Great info. So weird that my Green Stuff L319 is fine but my Yellow Stuff one are not.So that’s called pad knock back. It happens with OEM calipers with the combination of aftermarket pads. I have no idea why it occurs with different brands. I’m sure people use ferrodo pads with no issues and some have knock back like yourself. I had the same issue with yellowstuff EBC pads. I honestly drove it like that until they wore down. Then i slapped in orange stuff ebc pads and ebc rotors and that symptom is completely gone. No explanation honestly. As the article states, it has nothing to do with your pads/calipers. Its the combination of the pads, and rotors i guess thats currently on your truck.
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Pad Knock-Back - What it is, how it happens — and what to do about it - NASA Speed News Magazine
We’ve all seen the driver ahead of us dab the brakes before a big braking zone, but why, you might ask? It’s to remedy a condition called pad knock-back. Pad knock-back occurs when pads lose contact with the rotors, and it can be accompanied by excessive caliper piston retraction. There are a...nasaspeed.news