Hey everyone, hope you're all well. I had all four of my brake rotors replaced with the Power Slot Cryo treated units. In addition, I have replaced the stock pads with Hawk pads.

When I park, I engage the e-brake. When I disengage the e-brake and put the truck into reverse, it doesn't move. I have to gun the engine in order to actually move. When it finally does move, I hear a huge BANG and the truck lurches backward.

Any ideas?

Thanks for your time,
Anthony

 

Mine sort of does that too, but not as bad as yours sounds.

 

Take your rear wheels off and lubricate all the moving parts of the parking brake system. You will have to remove the rear rotors (calipers, etc) to get at it. The moving parts of the parking brake rust pretty good over time...

If you are feeling adventurous, you can order the replacement hardware (springs, pins etc) from Rock Auto and replace it while you are in there. Its not a hard job, just takes a little time to wire brush all the rust off and lubricate...

Mine would stick on and when I tore everything apart, there was nothing but rust, springs, pins etc. Its a wonder something didn't break. Easy job though...

 

The Ebrake has a known sticking problem. Mine caused rear end vibration on the freeway due to it not releasing all the way. Pull the rear rotor/drum assembly to inspect the ebrake.

 

 

Well, it never did this until they put on the new rotors and pads. Could it just be an error by the installer?

 

I don't know how familiar you are with that whole process back there so:

1) You said you had new rear rotors put on. Typically after a year, rear rotors build up a lip of rust inside the hat (the area not touched by the brake shoes). The parking brake shoes sit pretty close to the hat surface. When you try and remove the rear rotors, the parking brake shoes may catch on the lip of rust. To make it easier, there is an adjuster that collapses the parking brake and this allows you to remove the rotor. That adjuster has to be put back to the original position after the new rotors go on. If the installer adjusts wrong, either the parking brake won't hold the truck or the parking brake will rub all the time. Neither which you say is happening to you.

2) When you release the parking brake, the springs in the parking brake assembly are responsible for collapsing your shoes so the rotor can move. The springs can only exert so much force, lets say 10 pounds. If the pivot points are new/well lubricated, they may only offer 1/2 pound of resistance to the springs. Which means the springs will work fine. If the parking brake is rusted, it may offer 12 pounds of resistance. Which means your springs cannot overcome the force. Your parking brake stays on.

3) Since you mentioned your parking brake eventually retracts and you can drive, I think it it may be coincidence that they are acting up around the time you got the rear rotors replaced.

Could be other possibilities, none I can think of now...

 

I would buy the drum brake rebuild kit. comes with all new springs and auto adjusters.


truck is 5 yrs old...so it can only do good to replace.



also, does this occur everytime you park the truck?


or just when it has been sitting overnight?



if only after sitting overnight, that makes me think your brake pads are rusting to the rotors.

 

yeah those scissors mechanisms are a real bitch, mine gets stuck like this a lot.

 

https://www.f150online.com/forums/20...ke-repair.html

 

Subcooled nailed it with those scissor pics... Mine would do the vib at high speed too. Cleaning and lubing just the scissor portion solved the problem. The rust also prevented the eBrake from fulling engaging, not good on a boat ramp...

 

Apparently it was the paint from the rotors or something that hadn't burned off yet. I put the e-brake down just a little bit and drove very slowly. Seems to have fixed it. Installer says the brake is still tight and such.