Driveshaft Vibration?
 

This vibration has been here for about 2 years. Universals are tight, tires and rims have been changed. Can vibrate at any speed.If the engine is reved 3-4k rpm vibration is bad it doesn't matter what the road speed is. Any suggestions on narrowing it down? or just get the shaft balanced and U joints replaced? (Process of elimination)

I had the exact same problem. I tried everthing and then replaced the driveshaft with the Ford Motorsport alum. one and it solved the problem. It cost about 160 from Summit and it comes with new u joints too.

Same with me...the aluminum driveshaft fixed my vibration.

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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 lower control arms, Steeda CC plates, aluminum driveshaft, Steeda quadrant, MSD6A, 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

I would say go with the Alum drive shaft, but my car was doing the same thing and after the drive shaft it helped about 85%
but it is still there, but only at 70mph or higer and soem people keep telling me it is because i am running such a high gear 410s

I had a vibration, got a new driveshaft, and it only fixed about 85% of my problem also. I get the same explanation, my 4.10 gears.....

Why not just get an aluminum one with u joints? Cost is worth it. It'll last longer than your car

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88 GT mass air conversion from 90lx, Cobra Intake(ported/polished lower),Edlebrock Heads(ported/polished),24# injectors 70 mm BBK TB, 73mm C&L, 347 SB, Wolverine custom cam, 150 shot Nitrous, BBK 1 3/4 long tubes, BBK off road H pipe, Dynomax cat back, alum driveshaft, Konis,Southside Bars w chromemoly torque boxes,AOD w lentech valve body, B&M MegaShifter, 4.10 with Auburn diff, SVO springs, subs, cross drilled rotors,MSD A6 w ign retard, black magic fan etc.

Try rotating it 180*, that cured my prob once. Also depending on your mods, I actually stretched and twisted my yoke, and that also caused a vibration.

If it is RPM related, check your harmonic balancer, the rubber sleeve may have come out some.



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Dustin
93 Cobra 261 rwhp
89 GT(Saleen Clone) 392 rwhp(TFS Intake,TFS Heads, BD-11A 9#,Ecam,1.6 rr's, BBK longtubes, lots more...

There's so many things it can be, When I put in a new t-5 for the second time, i had one like that, and it turned out to be the flywheel. As of now, I am experiencing the exact same thing you are, but I am going to go the route the others have listed first before messin with the flywheel! http://www.mustangworks.com/msgboard/wink.gif
Good luck!

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Joe!
1988 GT, 167,000 miles!!! 13.71@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