mustang6tee8
Member
i wouldnt completely trust parts stores, buy yourself a factory service manual for peace of mind, thats what i did! they go for about 60-70 on ebay, definately worth the price.
i STILL have vibration. harmonic balancer? PLEASE help me
- Thread starter fiveoho
- Start date
i wouldnt completely trust parts stores, buy yourself a factory service manual for peace of mind, thats what i did! they go for about 60-70 on ebay, definately worth the price.
thanks for the advice. i did double check with ford. part #s show the same
service manual would be a nice piece to have
atleast i'm not the only one with vibration problems with a t5!! i've had them forever now. 
One of these days I really need to pull the tranny and see what is going on. I've also put in poly engine mounts(have the poly tranny mount as well but never installed it), changed the balancer, added a FRPP aluminum driveshaft. I'm running a t5z with a centerforce clutch.
Everything worked perfectly fine when it was first installed but then it started vibrating. Mine gets a lot worse with rpms. It vibrates even in neutral but just not as bad as when i'm at high rpms.
I was thinking it would be either the flywheel or pilot bearing. I'm also not sure if the mainshaft spins in neutral...maybe someone can clarify that for us.
good luck, i'll be following this thread closely and hopefully it will help me figure out my vibration problems as well!
One of these days I really need to pull the tranny and see what is going on. I've also put in poly engine mounts(have the poly tranny mount as well but never installed it), changed the balancer, added a FRPP aluminum driveshaft. I'm running a t5z with a centerforce clutch. Everything worked perfectly fine when it was first installed but then it started vibrating. Mine gets a lot worse with rpms. It vibrates even in neutral but just not as bad as when i'm at high rpms.
I was thinking it would be either the flywheel or pilot bearing. I'm also not sure if the mainshaft spins in neutral...maybe someone can clarify that for us.
good luck, i'll be following this thread closely and hopefully it will help me figure out my vibration problems as well!
I wanna toss out something I see here 
N O T say this is the problem
or
N O T even saying this is a problem
I do see the same clutch being used in both applications
where vibes are an issue
btw ... I was looking in my Ford Service Manual last night and could
not find any reference to a difference between the flywheel on a
GT or Cobra
Grady
N O T say this is the problem
or
N O T even saying this is a problem
I do see the same clutch being used in both applications
where vibes are an issue
btw ... I was looking in my Ford Service Manual last night and could
not find any reference to a difference between the flywheel on a
GT or Cobra
Grady
sounds like you and i are in the same boat. its a pain, as you know. and whats more of a pain is not knowing for sure whats causing the problem. my case is odd.
after i replaced the resurfaced fw with a new frpp one, it helped. then after i changed the balancer to a frpp, that helped. i still have some vibration. and i DID install a poly trans mount when i done the swap. after talking to several people, they said its very common for those mounts to cause vibration. mine also does it sitting still and while driving....more while driving now with rpm increase. my next thing will be ordering a oem rubber trans mount from ford ( $27 ). this is two different times i have not been pleased with energy suspension ( busted isolator in 2 weeks )
maybe we can find out from others if the main shaft turns in the trans while sitting still?
good luck to you too. maybe one of us or both will figure this out
after i replaced the resurfaced fw with a new frpp one, it helped. then after i changed the balancer to a frpp, that helped. i still have some vibration. and i DID install a poly trans mount when i done the swap. after talking to several people, they said its very common for those mounts to cause vibration. mine also does it sitting still and while driving....more while driving now with rpm increase. my next thing will be ordering a oem rubber trans mount from ford ( $27 ). this is two different times i have not been pleased with energy suspension ( busted isolator in 2 weeks )
maybe we can find out from others if the main shaft turns in the trans while sitting still?
good luck to you too. maybe one of us or both will figure this out
I wanna toss out something I see here
N O T say this is the problem
or
N O T even saying this is a problem
I do see the same clutch being used in both applications
where vibes are an issue
btw ... I was looking in my Ford Service Manual last night and could
not find any reference to a difference between the flywheel on a
GT or Cobra
Grady
i noticed that too...centerforce.
yeh that is odd that we both have the same problems and we both have centerforce clutches...
i doubt its ur poly tranny mount making those vibrations.. i have poly motor mounts and the stock rubber tranny mount and the vibrations are still there. I don't mind the vibrations at lower speeds but it feels like my tranny is going to let go at 4000+ lol. 
i doubt its ur poly tranny mount making those vibrations.. i have poly motor mounts and the stock rubber tranny mount and the vibrations are still there.
I don't mind the vibrations at lower speeds but it feels like my tranny is going to let go at 4000+ lol. Bringing this one back and to the top
fiveoho ... I wanted to make sure you saw this info by Barney
http://forums.stangnet.com/showthread.php?t=655733
He is a good guy and we have helped each other in the past
several times with self tuning issues
I've found his input to be not only interesting but helpful as well :Word:
Grady
fiveoho ... I wanted to make sure you saw this info by Barney
http://forums.stangnet.com/showthread.php?t=655733
He is a good guy and we have helped each other in the past
several times with self tuning issues
I've found his input to be not only interesting but helpful as well :Word:
Grady
Bringing this one back and to the top
fiveoho ... I wanted to make sure you saw this info by Barney
http://forums.stangnet.com/showthread.php?t=655733
He is a good guy and we have helped each other in the past
several times with self tuning issues
I've found his input to be not only interesting but helpful as well :Word:
Grady
let me read this thread and see what all is said. i appreciate you remembering my problem and tryin to help out.
quick question just for my peace of mind: i do still have some vibration but not as bad ( i think the poly trans mount is coming off next ). with the new flywheel installed and a new balancer installed, i should not have to worry about my crank or main bearings now?
No Prob at all my friend
I really don't think the poly trans mount causes a prob that could damage anything myself. But like all other mounts where you could go from rubber to a material that is more dense ... more nvh has to be tramsmitted over to the surrounding metal that contains the mount.
I would want to find what ever is causing the vibes because as you have said,
the vibes, even though smaller now, could cause some kind of damage over a period of time.
Bottom Line Here Is ... It just ain't supposed to shake, rattle, or roll
Good Luck
Grady
No Prob at all my friend
I really don't think the poly trans mount causes a prob that could damage anything myself. But like all other mounts where you could go from rubber to a material that is more dense ... more nvh has to be tramsmitted over to the surrounding metal that contains the mount.
I would want to find what ever is causing the vibes because as you have said,
the vibes, even though smaller now, could cause some kind of damage over a period of time.
Bottom Line Here Is ... It just ain't supposed to shake, rattle, or roll
Good Luck
Grady
you're exactly right. i just hope by replacing the hb and fw, theres no damage being done now. and the vibration is not terrible by no means. im extremely picky and i am a "glass is 1/2 empty" guy so to others, it may not even be bothersome. none the less, i still want to get to the bottom of it
99FiveOh
15 Year Member
Engines are making a certain degree of vibrations all the time. The stock mounts are designed to keep these vibrations from transfering into the body.
As Grady said a more dense material will transfer more vibes into the body of the car. This is really bad in 94/95 cars because the trans crossmember is mounted right to the body without the aid of rubber insulators like the fox's have. Since the trans is mounted pretty close to where you sit you'll feel alot more vibration coming from that trans mount.
Swap in the stock mount and let us know what happens.
As Grady said a more dense material will transfer more vibes into the body of the car. This is really bad in 94/95 cars because the trans crossmember is mounted right to the body without the aid of rubber insulators like the fox's have. Since the trans is mounted pretty close to where you sit you'll feel alot more vibration coming from that trans mount.
Swap in the stock mount and let us know what happens.
95BlackTan50
Member
- Oct 28, 2004
- 116
- 0
- 16
One of the observations that I had when I was looking for my vibration was that the tranny mount did make a difference. When I did the AODE to T5 conversion I didn't have the manual tranny exhaust bracket so I had to turn and slot my tranny crossmember to get the tranny mount to fit. Even with that, I had to install all of the tranny mount bolts loosly then torque everything down and that put enough stress on the tranny mount to separate the rubber from the metal. After reading some posts from people that have fixed their vibration issues by going from their poly mount back to the rubber mount, I decided to loosen the tranny mount and take off some of the stress. Surprisingly, the vibration came in at lower RPMs and went away at about 4000 RPM.
I ended up modifying my AODE bracket to look like the T5 bracket to keep the same geometry as stock and replaced the tranny mount with a new stock one. Now everything sits as it was supposed to and the tranny mount isn't under extra stress changing its damping characteristics.
The source of my vibration problem was an seriously imbalanced flywheel but I agree with Grady and The_Mustang that it would be worth a half hour under the car to try out a stock mount.
Grady, thanks for the ego boost. It's nice to be interested in my car again and checking out the forums.
Barney
I ended up modifying my AODE bracket to look like the T5 bracket to keep the same geometry as stock and replaced the tranny mount with a new stock one. Now everything sits as it was supposed to and the tranny mount isn't under extra stress changing its damping characteristics.
The source of my vibration problem was an seriously imbalanced flywheel but I agree with Grady and The_Mustang that it would be worth a half hour under the car to try out a stock mount.
final5-0 said:
Grady, thanks for the ego boost. It's nice to be interested in my car again and checking out the forums.
Barney
One of the observations that I had when I was looking for my vibration was that the tranny mount did make a difference. When I did the AODE to T5 conversion I didn't have the manual tranny exhaust bracket so I had to turn and slot my tranny crossmember to get the tranny mount to fit. Even with that, I had to install all of the tranny mount bolts loosly then torque everything down and that put enough stress on the tranny mount to separate the rubber from the metal. After reading some posts from people that have fixed their vibration issues by going from their poly mount back to the rubber mount, I decided to loosen the tranny mount and take off some of the stress. Surprisingly, the vibration came in at lower RPMs and went away at about 4000 RPM.
I ended up modifying my AODE bracket to look like the T5 bracket to keep the same geometry as stock and replaced the tranny mount with a new stock one. Now everything sits as it was supposed to and the tranny mount isn't under extra stress changing its damping characteristics.
The source of my vibration problem was an seriously imbalanced flywheel but I agree with Grady and The_Mustang that it would be worth a half hour under the car to try out a stock mount.
Grady, thanks for the ego boost. It's nice to be interested in my car again and checking out the forums.
Barney
Welcome back my friend
Its good to see you on the boards again
Grady
Chiming in here.
I also went thru this exact problem.
My first major problem was the flywheel.
Then the balancer cleaned it up a little more.
I was being cheap and didnt wanna replace my 10k miles dual centerforce clutch setup since it was still working great.
But sure as ****....and common sense should have directed me here.
Think about it.....you have a wobbly flywheel vibrating to hell,the clutch disk is taking that abuse as well as the pressure plate.
So..............now one or the other are m ost likely comprimised.
in your cases prlly the resurface was poor.Mine sure was.
You prly have a warped pressure plate......or the disc.
Mine stoped as soon as I changed the clutch.
The trans dont have enough rotating mass to cause a vibration in the motor at nuetral.
Although the input shaft will always spin because its in the flywheel and the flywheel is bolted to the motor.....
IN nuetral basicly only the front parts of the tranny are spinning which is the input shaft and a few small gears.
I also have poly motor mounts and poly trans and poly everything.
You could see the vibration in my steering wheel intensly when the motor vibrated at those certian rpms.
just to ease your worries...
if your crank was bent.........the vibration would get worse as rpms climb...you prly drive thru the vibrations after 3k 4k rpms right?
So..........that reallly leaves nothing more to guess.
You may have had the dowel pins put in a hair cocked or one of the bolts cross threaded ,could be a loose bell bolt even...check the upper bolts on the tranny for tightness and all the bolts for that matter.
If you feel the vibration in your shifter in neutral.Its something I just mentioned according to what you been thru.
Ill give odds that your pressplate/clutch disc are the cause
this is interesting
http://www.vibratesoftware.com/html...gine/first_order_engine.htm#Crankshaft Pulley
I also went thru this exact problem.
My first major problem was the flywheel.
Then the balancer cleaned it up a little more.
I was being cheap and didnt wanna replace my 10k miles dual centerforce clutch setup since it was still working great.
But sure as ****....and common sense should have directed me here.
Think about it.....you have a wobbly flywheel vibrating to hell,the clutch disk is taking that abuse as well as the pressure plate.
So..............now one or the other are m ost likely comprimised.
in your cases prlly the resurface was poor.Mine sure was.
You prly have a warped pressure plate......or the disc.
Mine stoped as soon as I changed the clutch.
The trans dont have enough rotating mass to cause a vibration in the motor at nuetral.
Although the input shaft will always spin because its in the flywheel and the flywheel is bolted to the motor.....
IN nuetral basicly only the front parts of the tranny are spinning which is the input shaft and a few small gears.
I also have poly motor mounts and poly trans and poly everything.
You could see the vibration in my steering wheel intensly when the motor vibrated at those certian rpms.
just to ease your worries...
if your crank was bent.........the vibration would get worse as rpms climb...you prly drive thru the vibrations after 3k 4k rpms right?
So..........that reallly leaves nothing more to guess.
You may have had the dowel pins put in a hair cocked or one of the bolts cross threaded ,could be a loose bell bolt even...check the upper bolts on the tranny for tightness and all the bolts for that matter.
If you feel the vibration in your shifter in neutral.Its something I just mentioned according to what you been thru.
Ill give odds that your pressplate/clutch disc are the cause
this is interesting
http://www.vibratesoftware.com/html...gine/first_order_engine.htm#Crankshaft Pulley
i appreciate you chiming in and helping out. i sure hope u are wrong about my low mileage centerforce but what u are saying makes sense how it could be the problem. the vibration did decrease dramatically after the flywheel and HB swap. its still there but not terrible. if it was the clutch, would it release funny or would i get chatter or anything?....im not now
when i took the flywheel out that was resurfaced ( maybe 25 miles ), it had a weird pattern on it...or weird to me. it had curved marks on it all theway around. they were all symmetrical. whats up with that?
i can drive my car now tho and not worry tho since the flywheel and balancer are new right? the crank and main bearings are not hurting, just the clutch ( if thats what it is ) ?
the poly mount is coming out soon with a rubber replacement.
I do think i got ripped on the trans tho. it shifts great, no grinds no pop outs but whines terrible and also when in 5th if i ease into the throttle pretty good while crusing and let off quickly, it feels like there is slack. does it a little in 4th too. this is while crusing at around 50 in 5th. i wish i could describe it better but slack or a split second of play or looseness is the best way i can .
