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Message: [QUOTE="FALKOR3theLuckDragon6.0, post: 1568011, member: 38285"] Alright, I’m at a loss here and could use some input. I’ve got a 2006 F-250 6.0 Power Stroke, and after replacing just about everything in the brake system except the ABS module, I’m dealing with a weird issue. After a fresh bleed of the hydroboost and master cylinder, everything feels fine at first. But after driving a mile or two, the brakes start applying themselves—not all at once, but enough to be a problem. Here’s what’s been replaced: Hydroboost (OEM from Ford) *Master cylinder (Aftermarket from O’Reilly’s, since OEM is discontinued) *Brake lines, calipers, and pads Now, here’s where it gets interesting: if I loosen the two nuts securing the master cylinder to the hydroboost, the issue goes away, and I can drive it back home with no problems. That makes me think the pushrod might be preloading the brakes and possibly needs a spacer. Has anyone dealt with this before using an aftermarket master cylinder? If so, is there a universal spacer that fixes this, or is there something else I should be looking at? Appreciate any insight before I start throwing more parts at it. Thanks! Edit: the problem started with replacing just the mastercylinder. It wasn't until after that I noticed the hydro boost was leaking in the cab and believed that to be the issue. Sadly it wasn't. [/QUOTE]

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