New vibration at certain RPMs

[jayrw]

Lately I can feel a vibration on the floor and gas pedal when the rpm's are between 1500 - 1900 rpm, its most noticeable when shifting from 1st to 2nd, just as 2nd gear starts to pull I feel the vibration, the lower the rpm's when I shift from 1st to 2nd the more its noticeable , Ive had the car for nearly a year now and never had this problem before, Any ideas appreciated.

Car is a 2000 GT w/ 68k miles, all stock except for a centerforce dual friction clutch w/ 1,100 miles.

Thanks.

 

[jayrw]

Nobody? Im sure ill end up taking it to a shop soon but im just curious what others thought...

 

[Dave0803]

I have the same problem with my 00 GT. Have you found a fix for this yet? I thought the clutch too but have not been able to look at it yet.

 

[N8Dogg98]

I'd suspect the clutch as well. After replacing my stock clutch with a ram clutch I began to get this vibration between 1500-1900 rpm in any gear. I notice it most in 3rd though...

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[Dave0803]

We're you ever able to find a fix for it? It's driving me nuts.


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[txredgt]

Clutch or motor mounts are the usual suspects. If those have never been changed I would say its time.

 

[Travis99]

I have a 99 GT with 74k with stock clutch. Im getting that same vibration on floor and pedal at 2000 rpm in every gear. Car has mac off road x-pipe/cat back. I figured out that at certain rpm the engine is causing the x-pipe to flex and chatter against the floor at the bottom of the firewall next to trans. I parked the car for winter and have not yet made any changes yet. May be something to check out since mid pipe stock or modded would have been removed to drop trans.

 

[AZmustang98]

Transmission crossmember mount? Totally different era of vehicle but my 64 Ranchero did the same thing and it turned out to be an almost 50 year old transmission mount.

 

[COramprat]

Check the u-joints.

 

[joshjwc9]

Check the u-joints.

This, replace them if you cannot remember when they were done last, if at all. Cheap insurance. Motor mounts are inexpensive as well. Jack the car up and look for any rubbing of the exhaust on the frame/underbody.

Trying adjusting the clutch by pulling up on the pedal and pushing the pedal in several times if you have stock cable/quadrant setup.

 

[Dave0803]

I've replaced both motor mounts and the trams mount. I convinced mine is the clutch and/or flywheel. It happens between 1000-1500 RPM and you can feel it in or out of gear.

 

[COramprat]

I've replaced both motor mounts and the trams mount. I convinced mine is the clutch and/or flywheel. It happens between 1000-1500 RPM and you can feel it in or out of gear.

While rolling or sitting still?

 

[Dave0803]

both. I feel it more when sitting still but i do still feel it when the car is moving. I think I feel it less when I'm moving only because there are other vibrations that kinda cancel it out a little.