vibration from tranny at high speeds?

VinceSVT · October 13th, 2008, 05:06 PM

I noticed at about 90 plus mph i feel a strong vibration coming from the trans. I checked my wheels balanced my driveshaft and cant find anything wrong. does anyone els have this problem please tell me how to fix it.

My friend has a the same problem with his GT. we both have alot of hard mielage on our cars. is there a bearing or something that can go bad in the tranny that becomes a common problem plz help.

TyCouey2000GT · October 13th, 2008, 05:08 PM

im sure it aint your tranny, its either your driveshaft or tires not balanced.. could be from locking lug nuts too... but probably your driveahaft. weve all had this problem

VinceSVT · October 14th, 2008, 07:33 PM

i doubt it's my driveshaft i have rebalanced it already?

SWEET2KSTANG · October 14th, 2008, 09:28 PM

check u joints and trans mout.

VinceSVT · October 19th, 2008, 11:10 PM

i replaced u joints. so ill check trans mount.

BlckBullitt01 · October 20th, 2008, 12:18 AM

Have you changed the gears in the rear end?

VinceSVT · October 22nd, 2008, 12:55 AM

no i have not.

v606er · October 22nd, 2008, 12:59 AM

a lightweight aluminum ds would probably help, but when you say 'checked your wheels,' does that include the air pressure and balancing?

VinceSVT · October 22nd, 2008, 03:01 PM

Yes

99mustanggtman · October 22nd, 2008, 03:27 PM

Driveshaft problem I think.

MineralGreyGT · October 22nd, 2008, 07:56 PM

could be a loose pinion, tranny mounts, unbalanced drive shaft. Also if you tuned you vehicle and you advanced your spark plug timing all the way it may cause your engine to vibrate under accel. but you say it only occurs at 90 mph so you might be able to disregard that. Also tire balancing and air pressure. That's all I can think of right now

texasd18e · October 22nd, 2008, 08:19 PM

might be your reverse lights. when it starts vibrating have someone ride behind you to see if the reverse lights come on when you throw it in reverse. if they come on then it's your driveshaft. if they don't come on then it's your tranny mount. hope this helps.

40thmustanggt · October 22nd, 2008, 09:43 PM

Originally Posted by texasd18e

might be your reverse lights. when it starts vibrating have someone ride behind you to see if the reverse lights come on when you throw it in reverse. if they come on then it's your driveshaft. if they don't come on then it's your tranny mount. hope this helps.

so your telling him to put his shit in reverse at 90mph?

bnuts677 · October 22nd, 2008, 10:19 PM

check your rear upper and lower control arm bushings if they are worn out it will make the rear vibrate at certain speeds i just found that out with my car.

VinceSVT · October 25th, 2008, 03:27 PM

thnx for the help im in the process of getting new trans mount. i think its loose. Ive balanced driveshaft replaced all rear bushings in my IRS balanced tires. im determined to stop the slop. thnx for the input guys.

BLK01SS · October 25th, 2008, 03:50 PM

Check you driveshaft bolts I had some come a loose on me after my tranny swap and a couple of weeks later I noticed a good vibration at higher speeds. So I tightend them back up again and it did it again so then I lock tightend them and they have came loose yet

October 13th, 2008, 05:06 PM	#1
VinceSVT Regular 2001 Mustang COBRA 13.39@106.36 Join Date: Oct 2007 Location: florida Posts: 80 iTrader: 0 reviews	vibration from tranny at high speeds? I noticed at about 90 plus mph i feel a strong vibration coming from the trans. I checked my wheels balanced my driveshaft and cant find anything wrong. does anyone els have this problem please tell me how to fix it. My friend has a the same problem with his GT. we both have alot of hard mielage on our cars. is there a bearing or something that can go bad in the tranny that becomes a common problem plz help.

October 13th, 2008, 05:08 PM	#2
TyCouey2000GT Enthusiast 2000 Mustang GT Join Date: Jun 2007 Posts: 761 iTrader: 0 reviews	im sure it aint your tranny, its either your driveshaft or tires not balanced.. could be from locking lug nuts too... but probably your driveahaft. weve all had this problem __________________ Your Average GT

October 14th, 2008, 09:28 PM	#4
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 (old set up) Join Date: Oct 2006 Location: N.W. AR Posts: 12,540 iTrader: 8 reviews	check u joints and trans mout. __________________ project warhorse under construction wagon burner under construction as well (04 lightning) being built by MP2 Performance

October 22nd, 2008, 03:27 PM	#10
99mustanggtman Hardcore Enthusiast 1999 GT Join Date: Feb 2007 Location: Germantown, MD/ OSU Posts: 1,835 iTrader: 7 reviews	Driveshaft problem I think. __________________ Single 67mm turbo, ported pi heads, edelbrock vic jr. manifold w/HPP plenum, terminator shortblock, return fuel system... Goal 600+ rwhp.

October 22nd, 2008, 07:56 PM	#11
MineralGreyGT Premium Member 2002 Mustang GT .... Join Date: Jun 2007 Location: DartsMouth, MA Posts: 1,380 iTrader: 3 reviews	could be a loose pinion, tranny mounts, unbalanced drive shaft. Also if you tuned you vehicle and you advanced your spark plug timing all the way it may cause your engine to vibrate under accel. but you say it only occurs at 90 mph so you might be able to disregard that. Also tire balancing and air pressure. That's all I can think of right now __________________

October 14th, 2008, 07:33 PM	#3
VinceSVT Regular 2001 Mustang COBRA 13.39@106.36 Join Date: Oct 2007 Location: florida Posts: 80 iTrader: 0 reviews	i doubt it's my driveshaft i have rebalanced it already?

October 19th, 2008, 11:10 PM	#5
VinceSVT Regular 2001 Mustang COBRA 13.39@106.36 Join Date: Oct 2007 Location: florida Posts: 80 iTrader: 0 reviews	i replaced u joints. so ill check trans mount.

October 20th, 2008, 12:18 AM	#6
BlckBullitt01 Regular TT Bullitt Join Date: Jun 2007 Posts: 263 iTrader: 2 reviews	Have you changed the gears in the rear end?

October 22nd, 2008, 12:55 AM	#7
VinceSVT Regular 2001 Mustang COBRA 13.39@106.36 Join Date: Oct 2007 Location: florida Posts: 80 iTrader: 0 reviews	no i have not.

October 22nd, 2008, 03:01 PM	#9
VinceSVT Regular 2001 Mustang COBRA 13.39@106.36 Join Date: Oct 2007 Location: florida Posts: 80 iTrader: 0 reviews	Yes

October 22nd, 2008, 08:19 PM	#12
texasd18e Regular 2001 Mustang GT 5.8 Join Date: May 2007 Location: Frisco Posts: 159 iTrader: 0 reviews	might be your reverse lights. when it starts vibrating have someone ride behind you to see if the reverse lights come on when you throw it in reverse. if they come on then it's your driveshaft. if they don't come on then it's your tranny mount. hope this helps. __________________ 351W c4 tranny AJE suspension slowly building

October 22nd, 2008, 10:19 PM	#14
bnuts677 Regular 2003 mustang gt/ 87 lx 11.92@114mph Join Date: Apr 2008 Location: edgewater, maryland Posts: 69 iTrader: 0 reviews	check your rear upper and lower control arm bushings if they are worn out it will make the rear vibrate at certain speeds i just found that out with my car.

October 25th, 2008, 03:27 PM	#15
VinceSVT Regular 2001 Mustang COBRA 13.39@106.36 Join Date: Oct 2007 Location: florida Posts: 80 iTrader: 0 reviews	thnx for the help im in the process of getting new trans mount. i think its loose. Ive balanced driveshaft replaced all rear bushings in my IRS balanced tires. im determined to stop the slop. thnx for the input guys.

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