vibration - Mustang Forum

Nate · 07-13-2009, 12:10 PM

engine or drivetrain....
slight vibrations while driving slow through town.. 4th gear at like 4krpms+ = satan. If i shut the car off, the vibration is still there while coasting. If i take it in and out of 4th gear, it feels really bad

Normally i'd say no problem and just rip apart the transmission.... however 4th gear is direct drive i believe (t5 manual)..... now obviously you cant diagnose a problem over the internet, but based off that info... should i take a look inside the trans or go for the engine? I did have that one piston that was lighter from the rest when i did the rebuild, but it just feels more driveline than engine

also, if you just sit there and rev the engine to 4k or so, it doesnt vibrate... so again, that doesnt lead me to believe and engine problem....
what could i be overlooking? Replace engine and come out w/ a vibration that only happens when the vehicle is in gear, most notably 4th gear....

hactor · 07-13-2009, 01:38 PM

fix the piston first

hnkstang50 · 07-13-2009, 06:21 PM

do you have different gears? alum driveshaft?

sounds like a drive shaft vibration possibly

N20PONY · 07-13-2009, 07:44 PM

Quote:

Originally Posted by hnkstang50

do you have different gears? alum driveshaft?

sounds like a drive shaft vibration possibly

.

I had the same problem, found some loose bolts in the driveshaft.

Nate · 07-14-2009, 06:32 AM

Quote:

Originally Posted by hnkstang50

do you have different gears? alum driveshaft?

sounds like a drive shaft vibration possibly

yeah, 4.30s and an aluminum driveshaft. I am plagued w/ the 75mph vibration, so i dont use the highway

this however, is different. Its a slight flutter while tooling around town, not that noticable... but 4th gear is the spawn of satan around 65+... shift into 5th and its straight butter.
if you shut the engine off while its vibrating horribly bad, its still there. You can feel it in the clutch a little bit, but if you try shifting in and out of 4th gear while coasting w/ the engine off... you think you are going to die. Its evil. im absolutely boggled.

OFF · 07-15-2009, 01:39 PM

Quote:

Originally Posted by Nate

yeah, 4.30s and an aluminum driveshaft. I am plagued w/ the 75mph vibration, so i dont use the highway

this however, is different. Its a slight flutter while tooling around town, not that noticable... but 4th gear is the spawn of satan around 65+... shift into 5th and its straight butter.
if you shut the engine off while its vibrating horribly bad, its still there. You can feel it in the clutch a little bit, but if you try shifting in and out of 4th gear while coasting w/ the engine off... you think you are going to die. Its evil. im absolutely boggled.

It sounded like driveshaft/u-joints to me also, but when you shift into 5th the vibration stops?

That's weird.

With drive shaft/u-joints/rear end the faster you go the worse it gets.
Engine, you can make it vibrate in neutral by reving it up.
Looks like all you're left with is transmission. Although at this moment I can't get my head around what would be causing it. I'll be thinking about it.

what happens at 75?

Nate · 07-16-2009, 12:38 PM

Quote:

Originally Posted by OFF

It sounded like driveshaft/u-joints to me also, but when you shift into 5th the vibration stops?

That's weird.

With drive shaft/u-joints/rear end the faster you go the worse it gets.
Engine, you can make it vibrate in neutral by reving it up.
Looks like all you're left with is transmission. Although at this moment I can't get my head around what would be causing it. I'll be thinking about it.

what happens at 75?

75 is the typical driveline vibration that happens to many guys w/ gears

if you do a search on the corral for vibration you'll see

basically its smooth, then around 75mph or so, it starts rattling you out of the car, and it makes a weird hmm... hmmm....hmm.....hmm.....hmm.... sound.
sucks. cant race it or take it on the highway

thats plagued me for years though, so i just dont do either of those. but the 4th gear thing.... im baffled, simply because it happened right after the engine swap.... i dont know.

OFF · 07-16-2009, 01:01 PM

Have you ever had your driveshaft balanced? That'll get rid of the 75mph gremlins for sure and it might uncover something else along the way.

What about mounts? Engine mounts in good shape? Trans mount fairly new?

Any chance you got the engine way off to one side on it's mounts when you dropped it back in? Pretty easy to check, just look at the bottom side of each frame bracket where the engine mount stud comes through and check that they are both in approx. the same position in the holes.

Nate · 07-16-2009, 01:24 PM

Quote:

Originally Posted by OFF

Have you ever had your driveshaft balanced? That'll get rid of the 75mph gremlins for sure and it might uncover something else along the way.

What about mounts? Engine mounts in good shape? Trans mount fairly new?

Any chance you got the engine way off to one side on it's mounts when you dropped it back in? Pretty easy to check, just look at the bottom side of each frame bracket where the engine mount stud comes through and check that they are both in approx. the same position in the holes.

aluminum driveshaft has been balanced like 3 times by 2 different shops

engines mounts are good, trans mount was replaced when i did the engine. i'll check the location of the mounts and make sure they're in the correct spots.

i should add that i had a lot of trouble getting the engine and trans to line up.

Nitrostangracin · 07-17-2009, 03:48 AM

Initially it sounded like it could be driveshaft related. Since you say it has been Balanced, that should be ruled out.

4th Gear is Direct Drive in the Transmission. Being that 4th Gear is the Input shaft, once getting into that gear it is not uncommon to experience vibration. This is caused either due to a worn inout shaft bearing or the input shaft is not shimmed properly. The input shaft is attatched to the main shaft and if not shimmedproperly it can wreak havoc. Once you shift into 5th it can and will go away because 5th gear is on the tailshaft side of the transmission.

Also in your PM you mentioned Alignement of the clutch and some issues. It is very possible that you damaged the hub of the clutch which can/will also cause a vibration.

Most likely the Balancer is OK but carefully inspect the Rubber Insert. Very common issue.

Let me know if I can help you out any further.

Nate · 07-17-2009, 07:17 AM

Quote:

Originally Posted by Nitrostangracin

Initially it sounded like it could be driveshaft related. Since you say it has been Balanced, that should be ruled out.

4th Gear is Direct Drive in the Transmission. Being that 4th Gear is the Input shaft, once getting into that gear it is not uncommon to experience vibration. This is caused either due to a worn inout shaft bearing or the input shaft is not shimmed properly. The input shaft is attatched to the main shaft and if not shimmedproperly it can wreak havoc. Once you shift into 5th it can and will go away because 5th gear is on the tailshaft side of the transmission.

Also in your PM you mentioned Alignement of the clutch and some issues. It is very possible that you damaged the hub of the clutch which can/will also cause a vibration.

Most likely the Balancer is OK but carefully inspect the Rubber Insert. Very common issue.

Let me know if I can help you out any further.

good point about the hub of the clutch..... i'll rip out the trans and see what i see.
thanks guys

Nitrostangracin · 07-17-2009, 05:35 PM

Quote:

Originally Posted by Nate

good point about the hub of the clutch..... i'll rip out the trans and see what i see.
thanks guys

What kind of clutch is it?

Nate · 07-17-2009, 05:42 PM

Quote:

Originally Posted by Nitrostangracin

What kind of clutch is it?

centerforce

Nitrostangracin · 07-17-2009, 05:56 PM

Quote:

Originally Posted by Nate

centerforce

Let me know if I can help you out. Can get you just a disc if needed.

MarkCS · 07-22-2009, 07:16 AM

Can you tell Nate in the 5.0 section that his vibration problem is a bad pilot bearing.

Thanks in Advance,

-Matt

Nate · 07-22-2009, 08:07 AM

Quote:

Originally Posted by MarkCS

Can you tell Nate in the 5.0 section that his vibration problem is a bad pilot bearing.

Thanks in Advance,

-Matt

?

and yeah, it was definitely a bad pilot bearing... or lack thereof

finishing it up today

MarkCS · 07-22-2009, 08:16 AM

Quote:

Originally Posted by Nate

?

and yeah, it was definitely a bad pilot bearing... or lack thereof

finishing it up today

Mattserbator..ban.t from here.. so he trolled and asked to post that to you.. His request was in the clubhouse under ATTN: Cream Poof

Nate · 07-22-2009, 11:03 AM

Quote:

Originally Posted by MarkCS

Mattserbator..ban.t from here.. so he trolled and asked to post that to you.. His request was in the clubhouse under ATTN: Cream Poof

Blck92GT · 07-22-2009, 12:23 PM

Glad you got it fixed, but how did you forget the pilot bearing?

http://www.youtube.com/watch?v=bVL3b1wKZQU

Nate · 07-22-2009, 05:08 PM

Quote:

Originally Posted by Blck92GT

Glad you got it fixed, but how did you forget the pilot bearing?

http://www.youtube.com/watch?v=bVL3b1wKZQU

memory lapse

i ordered one, forgot to put it in

, then i forgot that i forgot to put it in :insertohsnapjpg:

07-13-2009, 12:10 PM	#1
Nate Im still not from Detroit Join Date: Jun 2000 Location: Michigan Posts: 17,663	vibration engine or drivetrain.... slight vibrations while driving slow through town.. 4th gear at like 4krpms+ = satan. If i shut the car off, the vibration is still there while coasting. If i take it in and out of 4th gear, it feels really bad Normally i'd say no problem and just rip apart the transmission.... however 4th gear is direct drive i believe (t5 manual)..... now obviously you cant diagnose a problem over the internet, but based off that info... should i take a look inside the trans or go for the engine? I did have that one piston that was lighter from the rest when i did the rebuild, but it just feels more driveline than engine also, if you just sit there and rev the engine to 4k or so, it doesnt vibrate... so again, that doesnt lead me to believe and engine problem.... what could i be overlooking? Replace engine and come out w/ a vibration that only happens when the vehicle is in gear, most notably 4th gear.... Last edited by Nate; 07-13-2009 at 12:31 PM.

07-13-2009, 01:38 PM	#2
hactor Registered User Join Date: Oct 2003 Posts: 12,267	fix the piston first __________________ MG]http://farm4.static.flickr.com/3449/3845929297_7abe7d1c2e_o.jpg[/IMG]

07-13-2009, 06:21 PM	#3
hnkstang50 Registered User Join Date: Apr 2003 Location: NJ, flemington Posts: 3,708	do you have different gears? alum driveshaft? sounds like a drive shaft vibration possibly __________________ 89 gt. sold 82 gt. scraped 87 gt. sold 93 cobra #2713

07-16-2009, 01:01 PM	#8
OFF Old Fvckin Fossil Join Date: Dec 2004 Location: Alberta, Canada Posts: 32,471	Have you ever had your driveshaft balanced? That'll get rid of the 75mph gremlins for sure and it might uncover something else along the way. What about mounts? Engine mounts in good shape? Trans mount fairly new? Any chance you got the engine way off to one side on it's mounts when you dropped it back in? Pretty easy to check, just look at the bottom side of each frame bracket where the engine mount stud comes through and check that they are both in approx. the same position in the holes. __________________

07-17-2009, 03:48 AM	#10
Nitrostangracin www.nitrostangracing.com Join Date: Dec 2003 Location: Margate Florida Posts: 9,601	Initially it sounded like it could be driveshaft related. Since you say it has been Balanced, that should be ruled out. 4th Gear is Direct Drive in the Transmission. Being that 4th Gear is the Input shaft, once getting into that gear it is not uncommon to experience vibration. This is caused either due to a worn inout shaft bearing or the input shaft is not shimmed properly. The input shaft is attatched to the main shaft and if not shimmedproperly it can wreak havoc. Once you shift into 5th it can and will go away because 5th gear is on the tailshaft side of the transmission. Also in your PM you mentioned Alignement of the clutch and some issues. It is very possible that you damaged the hub of the clutch which can/will also cause a vibration. Most likely the Balancer is OK but carefully inspect the Rubber Insert. Very common issue. Let me know if I can help you out any further. __________________ Nitrostang Racing Check Out www.southeasternfoxbodies.com RIP ERIC MEDLEN SCOTT KALITTA Last edited by Nitrostangracin; 07-17-2009 at 03:50 AM.

07-22-2009, 07:16 AM	#15
MarkCS McLovin Bitches.. Join Date: Aug 2004 Location: North of Las Vegas Posts: 18,347	Can you tell Nate in the 5.0 section that his vibration problem is a bad pilot bearing. Thanks in Advance, -Matt __________________ Spyware Removal Tips: Find your rouge app here : Bleeping Computer Combofix : ComboFix (Rename it when you save it to AV2011.exe) Malwarebytes can be downloaded from here : Malwarebytes Antivirus (Best for 32 & 64 bit) Microsoft Security Essentials Full thread of detail Google DNS Servers

07-22-2009, 12:23 PM	#19
Blck92GT Current Bus Rider Join Date: Jan 2002 Location: Las Vegas Posts: 9,792	Glad you got it fixed, but how did you forget the pilot bearing? http://www.youtube.com/watch?v=bVL3b1wKZQU