Bad Driveline vibration. Bent Driveshaft??????
 

All right, here's the situation. Whenever I get above 70mph no matter what gear I am in, I get a really bad vibration somewhere in the driveline. I just had my tires balanced and it doesn't help when I push in the clutch at 70+mph. I know it's either in the tranny or the driveshaft. I can feel the vibration in the shifter pretty bad also. I hope it's the driveshaft and not the tranny. If anybody has had this problem or has some advice, please let me know before I buy the wrong thing. Thanks

Tha sounds like it needs the good 'ole NASCAR remedy....rotate your driveshaft 180* and it should clear it right up.

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Dustin
89 GT(Saleen Clone) 392 rwhp UNTUNED(TFS Intake, spacer,Heads and #2 cam, BD-11A 9#(only boosting 6???WTF),1.6 rr's,BBK 70mm TB,FMS 70mm MAF,MSD 6BTM,FMS 9mm wires,BBK longtubes and H-Pipe,American Thunder cat back,3.55 lots more...

12.564@118.49 on street tires is my best so far. Still untuned

I was going to say the same, rotate it 180, that should clear it up, if not get a aluminuim one.

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87 GT, 4 inch cowl hood,17x9 Cobra R's/255/45's,GT-40 heads,long tubes headers,h-pipe,Flows,BBK cold air, Mass air,70mm MAF, 1.7's, 1" spacer,underdrive pulleys,Pro 5.0, King Cobra, Adj. fuel Reg., Lakewood Lift Bars,50/50's,subframes, 4.10's.
Best time 12.96
Best MPH 103.42
Best 60' 1.695

Visit my site at:
http://www.geocities.com/cobrar93_2000/MyPage.html

I'll agree with that, rotate it, and if you still have vibration, get an aluminum.

I would say go with the alum D/S. did u just install new gears?? I had this problem when i went to 410s the stock drive shaft and 410 did not go well with each other. mine did the damn thing, vib like hell on highway. but i got an alum one and it went away about 85% only i can tell it vibs now. no one else can that rides with me.

just wondering,but will turing it 180 do??

I just bought a new alum driveshaft and had the same problems you have described. After a loooong time troubleshooting this vibration, and trying various things, I decided to get one. So I will let you know if this clears it up! http://www.mustangworks.com/msgboard/smile.gif Good luck!

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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