Driveline Vibration!!!!!!

birel21y

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its been a PITA ever since i bought the car... i just replaced the u-joints... and it helped, but it goes into a crazy vibration at 80+mph. I dont know what to do now, and have tried a FMS alum. driveline as well with almost no improvement.... Any Ideas?
 

Crone

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I just replaced both my ujoints and my balancer lol. I've been having a occasional vibration too, and a clunk... Not to sound like a noob but whats the pilot bearing? I searched but couldnt find a clear answer?
 

NERD

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birel21y said:
its been a PITA ever since i bought the car... i just replaced the u-joints... and it helped, but it goes into a crazy vibration at 80+mph. I dont know what to do now, and have tried a FMS alum. driveline as well with almost no improvement.... Any Ideas?

You're mailbox is full. Clean that crap out, lol.

Di you have any larger pictures of your car? I'm thinking about fabbing up a shaker setup on my car but I haven't seen many of them on our years.

Thanks,
Mike
 

CC'S95GT

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pilot bearing is what the trans input shaft rides in, inside of the crankshaft. if there is too much play inside of the bearing then you could get some vibs. and again is the vibs speed, or rpm related
 
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birel21y

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Its speed Related. Only over 70mph. and its like a switch. Maybe the stock drivelines are out of balance from the factory??
 
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birel21y

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You're mailbox is full. Clean that crap out, lol.

Di you have any larger pictures of your car? I'm thinking about fabbing up a shaker setup on my car but I haven't seen many of them on our years.

Thanks,
Mike
[/quote]

Hi Mike,

I used a hood and shaker setup on my 94. I had to cut the alum. bracket and mounted it to my alternator. The 04 hood didnt line up perfect. But it was sweet to see the torque of the engine move the scoop.
 

NERD

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birel21y said:
You're mailbox is full. Clean that crap out, lol.

Di you have any larger pictures of your car? I'm thinking about fabbing up a shaker setup on my car but I haven't seen many of them on our years.

Thanks,
Mike

Hi Mike,

I used a hood and shaker setup on my 94. I had to cut the alum. bracket and mounted it to my alternator. The 04 hood didnt line up perfect. But it was sweet to see the torque of the engine move the scoop.
[/quote]

yeah i did a google of your name and found some up close pictures. man, you really did a number on that car. Why didn't you just buy the CDC shaker hood assembly and modify it to work?
 

Steven

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I'm in the exact same boat. Mines 80+. I believe its the tailshaft bushing for the driveshaft. Rearend is being rebuilt this weekend, and I have new wheels and tires.
 

mic_lx

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Sounds like I'm in the same league as u guys, I also get an awful vibration going 80+ then it goes away when I speed up even more, but when comming down again to that 80mph+ range the vibration is there.

I hope is just a tire out of balance.
 

ProKiller

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i have this too. my rear tires were slightly out of balance, that helped but its still there. i'm going to have the driveshaft balanced one of these days to rule that out. also there is some talk about the driveline symmetry being not lined up. basically if you have the tranny hanging at the wrong angle it can cause a vibration but i don't know if i believe that....
 

GDTrumbo

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ProKiller said:
i have this too. my rear tires were slightly out of balance, that helped but its still there. i'm going to have the driveshaft balanced one of these days to rule that out. also there is some talk about the driveline symmetry being not lined up. basically if you have the tranny hanging at the wrong angle it can cause a vibration but i don't know if i believe that....

Are you referring to pinion angle? Yes, this can cause drivetrain vibrations. Incorrectly adjusted aftermarket UCA's can also contribute to this.

GT
 
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birel21y

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if the pilot bearing was bad, wouldnt that vibration just go with the RPM's? Im guessing its my tranny.. maybe a tailshaft bearing. >????? :BangHead:
 

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