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Vibration at 35-40mph and 1200-1300 rpm - 2005 Montego

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05-Montego
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Vibration at 35-40mph and 1200-1300 rpm - 2005 Montego

Post by 05-Montego » Sun Feb 19, 2012 9:17 pm

Any idea what would cause a vibration at around 1200-1300 rpm at a speed of about 35-40mph? If I'm crusing along at around 35mph and have my foot lightly pressing down on the gas pedal I notice a slight vibration in the 1200-1300rpm range. If I push the pedal down a little more, causing the rpm's to go up slightly, the vibration goes away.

It's not the roll resistor bushing as I just replaced that a few weeks ago. The problem was going on before then. I also don't think it's a transmission problem either since my fluid is still clean(not burned) and the level isn't low. I also don't think it's a transmission problem since all shifts between gears are nice and smooth. It's not having trouble shifting, it's just vibrating if I push down on the pedal slightly in that rpm/speed range. If I let off of the gas and just glide along at about 35 I don't feel the vibration, but applying the pedal slightly gives the vibration. The vibration feels like what a phone would make and I can feel it through the steering wheel and gear shift.

Is what I'm having just normal vibrations for the Duratec and 6-speed auto? If I'm accelerating up to speed I don't have any vibrations at that RPM range and speed. It only happens If I'm already at that speed and then push the pedal down enough for the rpm's to go up but not for the car to gain speed. I can feel the vibration through the steering wheel and gear shift.

Hopefully I've described this alright. Any ideas? Things to check for?
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2005 Mercury Montego Premier


05-Montego
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Re: Vibration

Post by 05-Montego » Mon Feb 20, 2012 2:49 pm

On my commute today I paid attention to the tachometer and my speed. It seems that I get vibration at any speed in any gear at around 1200-1300 rpm with very light throttle.

I may be imagining things. The car I had before this was an 04 Sable LS and although it did have the same Duratec engine, it had a 4-speed auto instead of a 6-speed. Also, the Sable had a ton of road noise but not much engine noise, whereas the Montego has hardly any road noise but a good bit of engine noise.

The vibration didn't just start all of a sudden, it's been going on since I got the car and doesn't really concern me that much. I'm mainly just curious as to whether it's a "problem" or just a "quirk". Looking over on "myfordfreestyle.com" I see that a few people mention having the same "problem". That leads me to believe it's just a quirk with the car.
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2005 Mercury Montego Premier

Edsel II
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Re: Vibration

Post by Edsel II » Tue Feb 21, 2012 12:36 pm

My car does the same thing. I've watched the tach and noted what gear the car is in when I feel the vibration. Honestly, I just think that the car is shifting into a higher gear than it needs to in the 35-40 mph range, at about 1200 or so RPM. The engine is lugging a bit, causing the vibration. Tapping the gas a bit kicks the car into the next higher gear, getting rid of the vibration.

I don't think it's a problem, just a quirk of the car.

rer21307
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Re: Vibration

Post by rer21307 » Tue Feb 21, 2012 2:04 pm

I agree, my car has always had that vibration. Engine is lugging in 6th gear at under 40 MPH. This car/engine is not the smoothest at any speed. It's OK, I like the car for many other good features, it now has 60500 miles with no problems.
07 500 SEL 6spd

05-Montego
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Re: Vibration

Post by 05-Montego » Thu Feb 23, 2012 1:42 am

Alright, well that puts my mind at ease. That's how I would describe the vibration as well. If I'm in that speed/RPM range and barely have my foot on the gas(just maintaining my speed) it vibrates but if I tap the gas a little more it shifts up to the next gear.

I figured it was nothing to be concerned with but I figured I'd go ahead and ask. That way I put my mind at ease and maybe someone in the future with the same question will see this thread too.

Thanks
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2005 Mercury Montego Premier

alp500
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Re: Vibration

Post by alp500 » Fri Feb 24, 2012 1:33 pm

05-Montego wrote:Any idea what would cause a vibration at around 1200-1300 rpm at a speed of about 35-40mph? If I'm crusing along at around 35mph and have my foot lightly pressing down on the gas pedal I notice a slight vibration in the 1200-1300rpm range. If I push the pedal down a little more, causing the rpm's to go up slightly, the vibration goes away.

It's not the roll resistor bushing as I just replaced that a few weeks ago. The problem was going on before then. I also don't think it's a transmission problem either since my fluid is still clean(not burned) and the level isn't low. I also don't think it's a transmission problem since all shifts between gears are nice and smooth. It's not having trouble shifting, it's just vibrating if I push down on the pedal slightly in that rpm/speed range. If I let off of the gas and just glide along at about 35 I don't feel the vibration, but applying the pedal slightly gives the vibration. The vibration feels like what a phone would make and I can feel it through the steering wheel and gear shift.

Is what I'm having just normal vibrations for the Duratec and 6-speed auto? If I'm accelerating up to speed I don't have any vibrations at that RPM range and speed. It only happens If I'm already at that speed and then push the pedal down enough for the rpm's to go up but not for the car to gain speed. I can feel the vibration through the steering wheel and gear shift.

Hopefully I've described this alright. Any ideas? Things to check for?
Hi,
You described it very well. I have 07 500 with 240k miles and it just started doin it after 210k. it is annoying but nothing has changed the issue. Replaced the whole engine mounts, intake manifolds, water pumps, etc... finally I found it myself that couse was from passenger side drive axle. It is kind of long and there is mount in the middle of it that connects to the chassis. That piece is little loose but they dont sell it seperate. whle axle needs replacement (dealer quoted part only $500 ).
Good luck.
07 Ford 500 SEL, 6 spd. 267k miles.
12 Kia Optima, 03 M-Benz C240, 03 Infiniti G35,
03 BMW 325CI, 01 Acura CL, 03 VW Passat 1.8T GLS, 01 VW Jetta 1.8T GLS

warment
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Location: Virginia

Re: Vibration

Post by warment » Wed Nov 27, 2013 1:00 pm

I just started getting the "partial throttle vibration" that you guys mentioned. My car is a 2005 with 206k miles. My vibration feels like it is coming from the driver side though. I want to pull the wheel and see if I can find any problems.
2005 Ford Five Hundred SE
6-spd auto

montycarlo1993
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Re: Vibration

Post by montycarlo1993 » Fri Aug 22, 2014 1:37 pm

alp500 saved me a whole lot of time and money. It was the front right axle, just like he said. I bought a remanufactured (reman) axle and threw it in and could feel the difference right away. You can either spend 300 dollars buying bearings which probably wont fix your problem or you can buy a 40-50 dollar reman axle which (if you're having the problems this forum describes) probably will. Installation takes time and tools but you don't have to be a mechanic to do it. You can look up videos on youtube.
P.S. Thank you so much alp500

warment
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Re: Vibration

Post by warment » Fri Aug 22, 2014 2:03 pm

My problem was caused by a bad cv joint nearest the inner support bearing. A new driveshaft fixed the problem. Mine was on the front side too. I did the install myself. Not too bad.
2005 Ford Five Hundred SE
6-spd auto

rlsullivanjr
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Re: Vibration

Post by rlsullivanjr » Thu Jan 08, 2015 4:44 pm

I have a 2005 Montego with 80k miles. The noise started recently. I just replaced the passenger side axle. It did not fix the noise :( . Would the driver side axle cause the same issue?

warment
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Re: Vibration

Post by warment » Thu Jan 08, 2015 6:11 pm

I think it could. The front right on is longer, has a support bearing, and would probably fail quicker than the left.
2005 Ford Five Hundred SE
6-spd auto

warment
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Re: Vibration

Post by warment » Thu Jan 08, 2015 6:12 pm

Are you sure you dont have a bad wheel bearing? What is the noise like? Howling? Crunching? Just vibration?
2005 Ford Five Hundred SE
6-spd auto

rlsullivanjr
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Re: Vibration

Post by rlsullivanjr » Thu Jan 08, 2015 6:19 pm

Just a vibration noise as described in the original topic. 1100-1300 rpm and light load. Don't feel it, just hear it. No vibration noise at any other speed or rpm.

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LuckyMike
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Re: Vibration

Post by LuckyMike » Tue Jan 03, 2017 2:39 pm

I had the exact same issue with vibration between 1100 and 1400 RMP at 35 mph. I replaced the right passenger side CV Axle this past weekend and the vibration is better but I still have a vibration. I've replaced the struts all the way around and the tires already. I suspect the drivers side CV axle or the front control arms. The right control arm looked and felt good when I disconnected it to replace the CV axle. Might also be the rear engine mount. I replaced the front and transmission mount already. I don't fee very comfortable changing the rear mount due to having to lay under the car while it's on stands. The right CV Axle was really easy once you buy the 21mm open ended wrench for the lower ball joint and the 32mm socket for the axle nut. It took me just under 3 hours taking a 15 min break half way through. Brake hardware took me 4 hours to do all four calipers. My back took 2 days to recover.
Mike

2007 Ford Five Five Hundred SEL
1999 Ford Mustang
1994 Ford Aerostar Minivan
1994 Ford Escort Wagon
1978 Ford Enconoline
1983 Nissian 200SX
1973 Buick Opel

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LuckyMike
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Re: Vibration at 35-40mph and 1200-1300 rpm - 2005 Montego

Post by LuckyMike » Mon Jan 30, 2017 11:50 am

I just replaced the rear engine mount and it SOLVED my issue with the vibration during acceleration as well as vibration at idle.

To change the mount I raised the car on jack stands and chocked the rear tires. Removed the upper cross member support. Removed the rear catalytic convertor. Removed the 3 8mm screws from the rear mount heat shield. Jack up the engine using a block of wood on the oil pan. Removed the exhaust clamp to the from catalytic convertor to allow the engine to go up further. Removed the mount, move second heat shield that's on the mount to the new one and install. Reverse procedure to install.

Looking back I would have replaced the rear engine mount when I replaced the passenger side cv axle. When you raise the engine you can see that the engine has to go up but the cv axle is attached to the wheel knuckle. I jacked up the lower control arm because I was afraid I was going to damage the axle.

Overall it took me 8 hours to change this mount laying under the car. PITA.
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Mike

2007 Ford Five Five Hundred SEL
1999 Ford Mustang
1994 Ford Aerostar Minivan
1994 Ford Escort Wagon
1978 Ford Enconoline
1983 Nissian 200SX
1973 Buick Opel

The Bone
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Re: Vibration at 35-40mph and 1200-1300 rpm - 2005 Montego

Post by The Bone » Tue Feb 07, 2017 7:58 am

When replacing the axles its wise to do both sides. If one is bad than the other one will go out soon and you will be doing it all over again. Just my experience.

warment
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Re: Vibration at 35-40mph and 1200-1300 rpm - 2005 Montego

Post by warment » Tue Feb 07, 2017 9:52 am

I had the same problem. For me, it was the right halfshaft. I replaced it and have had no issues since.
2005 Ford Five Hundred SE
6-spd auto

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LuckyMike
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Re: Vibration at 35-40mph and 1200-1300 rpm - 2005 Montego

Post by LuckyMike » Wed Apr 12, 2017 11:40 am

LuckyMike wrote:I just replaced the rear engine mount and it SOLVED my issue with the vibration during acceleration as well as vibration at idle.

To change the mount I raised the car on jack stands and chocked the rear tires. Removed the upper cross member support. Removed the rear catalytic convertor. Removed the 3 8mm screws from the rear mount heat shield. Jack up the engine using a block of wood on the oil pan. Removed the exhaust clamp to the from catalytic convertor to allow the engine to go up further. Removed the mount, move second heat shield that's on the mount to the new one and install. Reverse procedure to install.

Looking back I would have replaced the rear engine mount when I replaced the passenger side cv axle. When you raise the engine you can see that the engine has to go up but the cv axle is attached to the wheel knuckle. I jacked up the lower control arm because I was afraid I was going to damage the axle.

Overall it took me 8 hours to change this mount laying under the car. PITA.
I retract that I solved the issue by replacing the motor mount. I lessened the vibration but it is still there. I'm going to replace the drivers side CV axel since I replaced the passenger side earlier. The vibration is coming from the drivers side and I hope a new CV axel will fix it.
Mike

2007 Ford Five Five Hundred SEL
1999 Ford Mustang
1994 Ford Aerostar Minivan
1994 Ford Escort Wagon
1978 Ford Enconoline
1983 Nissian 200SX
1973 Buick Opel

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LuckyMike
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Re: Vibration at 35-40mph and 1200-1300 rpm - 2005 Montego

Post by LuckyMike » Thu Aug 24, 2017 8:15 am

I recently drained the AISIN 6 Speed transmission fluid and then changed the coolant the next weekend. The vibration is now gone and the car has significantly better performance. It now shifts much smoother and has the best response I have ever had. It really wants to get up and go now. My gas mileage is roughly the same :) with a little better MPG at around 20-22 City. I read an article in another blog that said the vibration was transmission related and not CV axle or engine mount issues. I am leaning towards the issue is with the transmission internal pump screens not necessarily the non serviceable trans filter. This is the 3rd time I have drained and refilled the transmission fluid. I have 132K on the car. At 130K I replaced the front lower control arms. Had to tighten them several times before they stayed tight. Still checking them periodically. Used blue locktite but am thinking of replacing the nylon-insert lock nuts and using red locktite. RockAuto sent me the control arms for the AWD instead of the FWD but I was able to file off the small metal pin on the frame so that the bushing would slide into the frame. Still questioning what the difference is between the FWD and AWD front control arms other than the metal bushing guide pin.

Anyway, the vibration in my '07 FWD 500 is gone and I am unable to reproduce the vibration at the speeds and RPM that it occurred before. The instrument panel no longer rattles/ vibrates and the car seems smooth. Only issue I am listening to now is what I believe to be a defective/ separating Goodyear Weather Handler tire that was recently balanced and has a large weight on it that I can hear and slightly feel. Going to move that tire to the rear and see if things change. :)

Best of luck to those that have the vibration. I highly suggest draining and refilling the AISIN 6sp at least three times. I now drain and fill mine every 30K. It's 4 quarts that I get out and around $40-50 for Motorcraft fluid.
Mike

2007 Ford Five Five Hundred SEL
1999 Ford Mustang
1994 Ford Aerostar Minivan
1994 Ford Escort Wagon
1978 Ford Enconoline
1983 Nissian 200SX
1973 Buick Opel

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