tires lock when going in reverse and hit brakes

[ciliatus]

I have an 04 Expedition XLT 4WD. Driving forward has no issues at all. When I put in reverse, it is fine as well, until I hit the brakes. It is not immediate unless I hit it hard. ie... If I am trying to back slowly, with slight pressure on the brake pedal, it will go for a bit, but then I get a thud and feels like it locked. If I let off of the brakes, it still feels locked, and is almost like a metal to metal grind. If I place back into Drive, my brakes feel a bit loose at first until I basically pump them back up. then everything is fine again.

I thought maybe there was an issue with my back disc pads, so I replaced those. While doing so I also pulled off the rotors and looked at the emergency brakes. I did not see anything that stood out to be the issue. Put everything back together, took it for a drive and still exactly the same thing.

The issue started out slightly and originally when I was backing I would just hear a small thud, but still backed fine. If I backed slowly while some pressure on the brake for about 5 ft or so, then it was fine after that and if I hit the brakes harder, it would not make a thud or anything just stop normally. Now it feels like when it makes that thud, something is binding.

 

[stamp11127]

Might try pulling the fuse for the abs and testing reverse & braking again to see if it is related to the abs system.

 

[1955moose]

Besides the Abs malfunctioning, it could be you have a leaking/ sticking brake caliper. I would jack it , put it on 4 strong stands. Have an assistant put in reverse, duplicate symptoms, see if and what wheel is sticking. I don't think they are, but look for any caliper leaking, binding, or loose on mounting. Are their any brake/abs lights lit?


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[ciliatus]

no lights on. I will try removing the fuse when I get a chance, but wonder why it would only do that in reverse though.

 

[1955moose]

Can you tell which wheel is making the noise r/r or L/r?. Run a diagnostic check. Could be a abs sensor that's making noise but not tripping light. You may have to have shop take a look. At 6,000 lbs don't want brakes at 100 percent.


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[ciliatus]

I was way off, it was actually coming from the front tire. Had someone check while I was backing. The front rotor mount it missing the top bolt. Any suggestions where to get a replacement? I checked my local dealership and they would have to order, comes in a pack of 4 and asking for 25

 

[1955moose]

Wrecking yard? Try Oreillys or auto zone? Glad it was something easy.


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[1955moose]

Just checked Oreillys, they can get it for you a $8.29 each. Don't know what year you have. I keyed in 2003. You may have to replace caliper, if you can't remove broken bolt in the old caliper.


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[ciliatus]

thanks. Not the caliper bolt, it is the one to the caliper mount. I did find though, they are 14mm x 37mm. They have 14mm x 35mm at Ace hardware I bought a couple there and some blue locktite. Should do the trick.

 

[1955moose]

Good deal. If they carry a stronger grade bolt, it's always advisable.


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