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I have a V6 MTX tour...When I put my car in reverse, let go of the clutch and give it a little gas I feel a suddle jerk, that also makes a rather loud noise?? It does not do it everytime but every once in a while?? What could this be?
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sounds more like a transmission problem to me you may wanna get this moved to the tranny forum.
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mine kind of does the same thing but when im backing up and hit my brakes ever so slightly, it sounds like i hit something. its just and audible boom.
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I don't know if its related, but I get that everynow and then, its my exhaust banging up against my heatsheild under there. The BAT y-pipe connects to my SVT cat-back right in the middle of the heatsheild and its kind of tight in there. The torque of the engine/tranny causes the engine/tranny/attachedexhust manifods to vibrate. At least that's my theory. I've been meaning to get under there and adjust the heatsheild a bit so its got more room for "play" and see if that cures it.
I doubt its a tranny issue, at least in my case, I just had a rebuilt trans installed with new half-shafts and quaife, so, at least I would hope, its not a tranny/driveline issue for me.
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possibly rear brakes binding.
97 mondeo st24 rsa pack
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I have heard this a couple times before on other vehicles. If you have drum brakes (since I'm not sure on your car), then it is quite possibly the pads in the rear flopping around due to a broken spring or retainer pin. When you back up the pads move inside the drum. Again, I am posting this cause I don't know if you have drums or discs in the rear.
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Originally posted by epattonm:
I have heard this a couple times before on other vehicles. If you have drum brakes (since I'm not sure on your car), then it is quite possibly the pads in the rear flopping around due to a broken spring or retainer pin. When you back up the pads move inside the drum. Again, I am posting this cause I don't know if you have drums or discs in the rear.
with a duratec and a mtx he should have disks in the back, but with contours who knows.
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Originally posted by 97Duratectour:
I have a V6 MTX tour...When I put my car in reverse, let go of the clutch and give it a little gas I feel a suddle jerk, that also makes a rather loud noise?? It does not do it everytime but every once in a while?? What could this be?
does it only do it after the car has been sitting for a while (at least overnight) with the parking brake on?
If so then what you're hearing is the sound of the rear brake pads breaking free from the rotor. What happens here is when you apply the hand brake the rear brake pads are pressed against the rotors and overnight or longer the exposed metal particles in the brake pads fuse to the steel rotors as they oxidize or rust slightly.
If I am leaving my car for a long time when I park it I put the brake on to keep it from rolling but then I block the wheels with a brick or piece of wood and then let the brake off so the pads don't get stuck to the rotors.
I feel sorry for the people who don't drink. When they wake up in the morning, thats the best they're going to feel all day - former President Lyndon B. Johnson
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does it only do it after the car has been sitting for a while (at least overnight) with the parking brake on?
If so then what you're hearing is the sound of the rear brake pads breaking free from the rotor. What happens here is when you apply the hand brake the rear brake pads are pressed against the rotors and overnight or longer the exposed metal particles in the brake pads fuse to the steel rotors as they oxidize or rust slightly.
i said that..brakes binding  also the handbrake cables can get sticky and cause the brakes to stay on slightly.your mpg will drop with this though 
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Yea actually it does do it a lot more if the car has been sitting for a while, and although I'm not positive if the emergency brake was on every time but that will give me something to look for. And as someone else said if I recal, it does do it when I tap the foot brake as I'm backing up more then it does if I don't do so. (By the way, I do have 4-wheel disc brakes). Thanks for the help.
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