vibrations

89beastin · April 14th, 2007, 11:08 PM

i have a 89 5.0 5 speed with heads.. cam.. 70mm throttle body... cold air intake... intake manifold.. 4-10 gears... and full exhaust and long tube headers... and rebuilt engine and new transmission... clutch.. flywheel... and pressure plate...
wen the car is in neutral.. and u hit the gas and hits 3000 rpms... the car vibrates like the transmission raddles...
I change the harmonic balancer... aluminum drive shaft and new u-joints...
i change the wires.. plugs.. and roto-cap... and it still vibrates... tranny mounts n motor mounts also...

Even wen the car is driving... once it hits 3000 rpms n up.. it still vibrates...

Im loosing my mind.... why wont it stop vibrating... help me out if you know anything... thanks!!

SALIV8 · April 15th, 2007, 12:15 AM

check tires andrims

angermgt · April 15th, 2007, 12:42 AM

if it does it in neutral that eliminates everything from trans back. sounds like it could be flywheel if you say sound is coming from tranny area.if not crank.

SALIV8 · April 15th, 2007, 11:24 AM

could be driveshaft with a dent, a ton of things... try looking at motor with a buddy revving it to 3k on jack stands and investigate safely...

Stangzilla · April 15th, 2007, 11:28 AM

Originally Posted by SALIV8

could be driveshaft with a dent, a ton of things... try looking at motor with a buddy revving it to 3k on jack stands and investigate safely...

Dude again he said it happens in neutral.. That means the trans and driveshaft are not even spinning..

Stangzilla · April 15th, 2007, 11:32 AM

Well if you said you put in a second balancer that you know is good like the other dude said it could be the flywheel.. Are you sure you have the motor balanced correctly.. If it is balanced for 50oz are you positive both the balancer and flywheel are 50oz or if it is balanced for 28oz are you sure they are both 28oz? If you are then the only thing it prob could be is something inside the motor itself... Hope not though for your sake..

tording92lxnotch · April 15th, 2007, 03:09 PM

Originally Posted by Stangzilla

Originally Posted by SALIV8

could be driveshaft with a dent, a ton of things... try looking at motor with a buddy revving it to 3k on jack stands and investigate safely...

Dude again he said it happens in neutral.. That means the trans and driveshaft are not even spinning..

If the clutch is out and it is in neutral then the input shaft of the transmission is still spinning so it still could be transmission related. I would think not because you said its new but you never know. Now if you push the clutch in then the input shaft is not spinning so if it does it then, you can rule out the driveline, which means is something between the pressure plate and the harmonic balancer.

Stangzilla · April 15th, 2007, 04:43 PM

Originally Posted by tording92lxnotch

Originally Posted by Stangzilla

Originally Posted by SALIV8

could be driveshaft with a dent, a ton of things... try looking at motor with a buddy revving it to 3k on jack stands and investigate safely...

Dude again he said it happens in neutral.. That means the trans and driveshaft are not even spinning..

If the clutch is out and it is in neutral then the input shaft of the transmission is still spinning so it still could be transmission related. I would think not because you said its new but you never know. Now if you push the clutch in then the input shaft is not spinning so if it does it then, you can rule out the driveline, which means is something between the pressure plate and the harmonic balancer.

Yeah I forgot to mention the pushing in the clutch part..

Thanx man...

SALIV8 · April 16th, 2007, 02:11 AM

Originally Posted by Stangzilla

Originally Posted by SALIV8

could be driveshaft with a dent, a ton of things... try looking at motor with a buddy revving it to 3k on jack stands and investigate safely...

Dude again he said it happens in neutral.. That means the trans and driveshaft are not even spinning..

yup.. skimmed over the neutral part. thanks

April 14th, 2007, 11:08 PM	#1
89beastin Look Ma! My First Post! Join Date: Apr 2007 Posts: 1 iTrader: 0 reviews	vibrations i have a 89 5.0 5 speed with heads.. cam.. 70mm throttle body... cold air intake... intake manifold.. 4-10 gears... and full exhaust and long tube headers... and rebuilt engine and new transmission... clutch.. flywheel... and pressure plate... wen the car is in neutral.. and u hit the gas and hits 3000 rpms... the car vibrates like the transmission raddles... I change the harmonic balancer... aluminum drive shaft and new u-joints... i change the wires.. plugs.. and roto-cap... and it still vibrates... tranny mounts n motor mounts also... Even wen the car is driving... once it hits 3000 rpms n up.. it still vibrates... Im loosing my mind.... why wont it stop vibrating... help me out if you know anything... thanks!!

April 15th, 2007, 11:32 AM	#6
Stangzilla MM Fanatic Join Date: Aug 2006 Location: On my way to Baines's house!! Posts: 3,298 iTrader: 0 reviews	Well if you said you put in a second balancer that you know is good like the other dude said it could be the flywheel.. Are you sure you have the motor balanced correctly.. If it is balanced for 50oz are you positive both the balancer and flywheel are 50oz or if it is balanced for 28oz are you sure they are both 28oz? If you are then the only thing it prob could be is something inside the motor itself... Hope not though for your sake.. __________________ Rotating The Earth 1320 Feet At A Time!! Today, I found out that when I masturbate at night while watching internet porn I cast a huge shadow on the curtain and the entire street is able to see it.

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April 15th, 2007, 12:15 AM	#2
SALIV8 Enthusiast Join Date: Dec 2006 Location: the MURDER CAPITOL Posts: 520 iTrader: 0 reviews	check tires andrims

April 15th, 2007, 12:42 AM	#3
angermgt Regular Join Date: Nov 2006 Location: new jersey Posts: 154 iTrader: 0 reviews	if it does it in neutral that eliminates everything from trans back. sounds like it could be flywheel if you say sound is coming from tranny area.if not crank.

April 15th, 2007, 11:24 AM	#4
SALIV8 Enthusiast Join Date: Dec 2006 Location: the MURDER CAPITOL Posts: 520 iTrader: 0 reviews	could be driveshaft with a dent, a ton of things... try looking at motor with a buddy revving it to 3k on jack stands and investigate safely...

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