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Joined: Jan 2006
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1999 SVT 2.5L duratech v6
when i accelerate in the low rpm, there is an annoying rattle or grinding type noise...it makes the car sound like crap...however it doesn't do it when you rev it in neutral...anyone know what might cause this?
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Joined: Dec 2003
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Could be something as minor as a bent exhaust heat shield (can bend it off whatever it's rattling on) to as bad as gear grind. I'd say it's a bent heat shield, despite it not rattling when in neutral.
Tranny mount loose?
Someone else with more experience will chime in, I thought I'd tell you some pointers so youre not stuck waiting. 
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Joined: Nov 2003
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doesn't the car check the ABS at around 11mph? i get a noise i i could have sworn i read that at about 11 mph the car does some sort of a check on the ABS 
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Joined: Jun 2005
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Welcome . I doubt it is the ABS sound (unless it sounds like a "thunk"/spring sound.
"Always do the cheap and easy ones first."
1996 V6 ATX 96K miles
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yeah for example if i shift early like from 2nd to third or somthing and i accelerate, the rpms drop obviously and it makes a rattling noise until it gets into like 2300-2500 rpm range....i dunno..but ill check it out thanks for the advice
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Joined: Mar 2005
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I've just had my car(5spd contour SE Sport) checked today for the same symptoms as to what you describe. Heat shield was tight and in good condition, tranny mount and bearings have nothing to do with it apparently. It turned out that the grinding noise comes from the speedo or RPM cable!!?
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Originally posted by SVTuk77:
yeah for example if i shift early like from 2nd to third or somthing and i accelerate, the rpms drop obviously and it makes a rattling noise until it gets into like 2300-2500 rpm range....i dunno..but ill check it out thanks for the advice
Sounds like good old fashioned lugging to me.....
'99 Sport TropicGreen,Duratec, SVT exhaust, Brembo rotors, Ceramic pads, K&N filters(oil & air), Alpine CDM7874, Polk DB570 speakers front and rear. Fog light mod. 50% Formula One tint.
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I had the same problem (98 SVT), people told me the same things. I even put a dual-mode damper on, helped a little, but I knew the annoying vibration wasn't always there.
Turns out the bolt on the left-support insulator (mount on TOP of the trans) was broken, and the rear roll restrictor was flattened a little. I didn't even know the mount on top of the trans was broken untill i went to take it off when i pulled the trans and it fell apart lol. I replaced both mounts and the vibration was gone =D
Its been my expierience any little vibration that wasn't always there, and the engine runs fine - inspect all the motor mounts.
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Originally posted by gearhead:
Originally posted by SVTuk77:
yeah for example if i shift early like from 2nd to third or somthing and i accelerate, the rpms drop obviously and it makes a rattling noise until it gets into like 2300-2500 rpm range....i dunno..but ill check it out thanks for the advice
Sounds like good old fashioned lugging to me.....
Yep.
Sounds like your just luggin the engine. The Duratech operates best above 2000rpm. Try to keep it above that when in gear.
My Cars
1999 Silver Frost SVT - 80,000km #2603/2760 Aug. 10, 1999.
1996 Mercury Mystique LS V6 MTX - retired @ 323,151km.
1995 Ford Contour V6 MTX-sold @ 214,000km
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Take a look at your catalytic converter heat shields, you may need to clamp around one of them with a long hose clamp, or several linked together. It may rattle if you tap moderately on the shield. The large catalyst under the floor on my Mystique had a rattle. Sometimes the inside of the catalyst breaks up, hopefully not on your car.
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