Car Vibrates when going 50MPH

89FHPLX · 06-02-2001, 12:47 AM

OK this just started, When I'm in 5th gear in the highway and I let go of the pedal the car vibrates(HOPE MY SPELLING IS CORRECT). Even in fourth when I start to gun it a little, you can feel the shifter and the floor, and well basically the whole car shake. Tires are brand new, blance, and botls are tight. I recently heard tonight a noise in my rear brakes like if something was loose in there. but the shakeing of the car is really bad. its worse when I give it gas and when I let go of the gas going 50mph or more. Can this be a Mount? I hope you guys have a Idea what this can be. My car has 145,658 miles on it but its always keep in very good running condition.

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89 Police Interceptor
BBK Shorty Headers, K@N Cone Filter,H-pipe no cats, 2 chamber FlowMasters,Under Drive Pullys,14 degree Timing, Short Belt, No Air Silencer, oil cooler, 3.08's, And All Police Package goodies

06-02-2001, 01:07 AM

My car started doing the same thing after i did a hellacious burnout and it ended up being the driver's side motor mount. While i was at it I also replaced the trans mount and passenger side mount and it went away completely.

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'84 Mustang 5.0 LX
My car

[This message has been edited by 84stangLX (edited 06-02-2001).]

Mercury · 06-02-2001, 01:36 AM

How old are you Universal joints? Take a look at those.

Stang Runner · 06-02-2001, 06:55 AM

I think it sounds like the u-joints? There are nice and cheap and not to hard to do do them be for you put new motor mounts on. I bet that it is the Universal joints, It likes to go out if you drive it hard, You can get heaver Duty. If it is not that it could be you drive shaft out of balance like a tire, it has wieghts on it. 1 might have come off. try theU-joints frist or you could get a new Alu,inum Driveshaft for like $165.

89FHPLX · 06-02-2001, 12:35 PM

Thanks guys I will check that later today

------------------
89 Police Interceptor
BBK Shorty Headers, K@N Cone Filter,H-pipe no cats, 2 chamber FlowMasters,Under Drive Pullys,14 degree Timing, Short Belt, No Air Silencer, oil cooler, 3.08's, And All Police Package goodies

crewzin · 06-02-2001, 01:30 PM

Might be trans mount. I had my 70 mach 1 loose the rubber in the mount and it acted just like a bad u joint.

dinomite · 06-02-2001, 06:24 PM

1. U-joints/driveshaft
2. trans mount
3. differential/axels

TEXSN95 · 06-02-2001, 10:01 PM

FMS aluminum driveshaft...$160. With new ujoints and about 15lbs lighter, it's a steal.

------------------
Clint L.
White 95 Cobra #3637
58cc GT40X heads with mild porting, Crane 2031 cam, FRPP 65 TB, 1.7s, Cobra intake, homeade cold air, 155lph, pullies, Tokico Illuminas, C springs, GW LCAs, Kenny Brown super subs, Steeda CC plates, aluminum driveshaft, Steeda quadrant, B&M ripper, Kirban FPR, MSD6A, Taylor wires, Mac shorties, off road hpipe, 2 1/2 ultra flows w/ dumps, R hood, Euro clear corners, stock 3.08s
13.61 @ 104.7 w/ 2.22

dinomite · 06-02-2001, 10:27 PM

turn your current one 180* before buying a new one

joe4speed · 06-02-2001, 11:40 PM

Quote:

Originally posted by TEXSN95:
FMS aluminum driveshaft...$160. With new ujoints and about 15lbs lighter, it's a steal.

... just bought one, it's awesome, fixed my vibration!

------------------
Joe!
1988 GT, 167,000 miles!!! 13.58@105mph Check out my listing! Click here! Or my website:
www.joe4speed.com
1999 Ninja ZX-6R 10.32@135mph!
1993 Olds Eighty Eight LSS 16.40@88.8mph

06-02-2001, 12:47 AM	#1
89FHPLX Registered Member Join Date: Aug 2000 Location: Miami, Florida Posts: 116	Car Vibrates when going 50MPH OK this just started, When I'm in 5th gear in the highway and I let go of the pedal the car vibrates(HOPE MY SPELLING IS CORRECT). Even in fourth when I start to gun it a little, you can feel the shifter and the floor, and well basically the whole car shake. Tires are brand new, blance, and botls are tight. I recently heard tonight a noise in my rear brakes like if something was loose in there. but the shakeing of the car is really bad. its worse when I give it gas and when I let go of the gas going 50mph or more. Can this be a Mount? I hope you guys have a Idea what this can be. My car has 145,658 miles on it but its always keep in very good running condition. ------------------ 89 Police Interceptor BBK Shorty Headers, K@N Cone Filter,H-pipe no cats, 2 chamber FlowMasters,Under Drive Pullys,14 degree Timing, Short Belt, No Air Silencer, oil cooler, 3.08's, And All Police Package goodies

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06-02-2001, 01:07 AM	#2
84stangLX Guest Posts: n/a	My car started doing the same thing after i did a hellacious burnout and it ended up being the driver's side motor mount. While i was at it I also replaced the trans mount and passenger side mount and it went away completely. ------------------ '84 Mustang 5.0 LX My car [This message has been edited by 84stangLX (edited 06-02-2001).]

06-02-2001, 01:36 AM	#3
Mercury The Redneck James Bond Join Date: Sep 2000 Location: Fayetteville NC Posts: 1,707	How old are you Universal joints? Take a look at those.

06-02-2001, 06:55 AM	#4
Stang Runner Registered Member Join Date: Jun 1999 Location: Walker, MI, USA Posts: 1,202	I think it sounds like the u-joints? There are nice and cheap and not to hard to do do them be for you put new motor mounts on. I bet that it is the Universal joints, It likes to go out if you drive it hard, You can get heaver Duty. If it is not that it could be you drive shaft out of balance like a tire, it has wieghts on it. 1 might have come off. try theU-joints frist or you could get a new Alu,inum Driveshaft for like $165.

06-02-2001, 12:35 PM	#5
89FHPLX Registered Member Join Date: Aug 2000 Location: Miami, Florida Posts: 116	Thanks guys I will check that later today ------------------ 89 Police Interceptor BBK Shorty Headers, K@N Cone Filter,H-pipe no cats, 2 chamber FlowMasters,Under Drive Pullys,14 degree Timing, Short Belt, No Air Silencer, oil cooler, 3.08's, And All Police Package goodies

06-02-2001, 01:30 PM	#6
crewzin Registered Member Join Date: May 2001 Location: Sour Lake, TX Posts: 211	Might be trans mount. I had my 70 mach 1 loose the rubber in the mount and it acted just like a bad u joint.

06-02-2001, 06:24 PM	#7
dinomite The Dude Join Date: Feb 2001 Location: Arlington, VA Posts: 1,262	1. U-joints/driveshaft 2. trans mount 3. differential/axels

06-02-2001, 10:01 PM	#8
TEXSN95 Registered Member Join Date: Mar 2001 Location: college station, tx Posts: 143	FMS aluminum driveshaft...$160. With new ujoints and about 15lbs lighter, it's a steal. ------------------ Clint L. White 95 Cobra #3637 58cc GT40X heads with mild porting, Crane 2031 cam, FRPP 65 TB, 1.7s, Cobra intake, homeade cold air, 155lph, pullies, Tokico Illuminas, C springs, GW LCAs, Kenny Brown super subs, Steeda CC plates, aluminum driveshaft, Steeda quadrant, B&M ripper, Kirban FPR, MSD6A, Taylor wires, Mac shorties, off road hpipe, 2 1/2 ultra flows w/ dumps, R hood, Euro clear corners, stock 3.08s 13.61 @ 104.7 w/ 2.22

06-02-2001, 10:27 PM	#9
dinomite The Dude Join Date: Feb 2001 Location: Arlington, VA Posts: 1,262	turn your current one 180* before buying a new one