U joints? or driveshaft?

Mustangbelle306 · 03-31-2001, 12:35 PM

Well after spending 6 hours stripping, sanding and primering the Rustang, I was driving home, and after I took off at a light, I noticed a vibration coming from the tranny, that has began to shake the whole car. I've asked around, and I'm hearing anything from transmisson mount, to driveshaft loose, to U joints. The car has over 100k miles, and this just started last night. It has been raining, so I haven't even bothered to look under the car.

Also, I had some problems with my emergency brake bracket. I was..well *ahem* mad once, and pulled the e-brake handle up so hard that I ripped the bracket out of the floorboard, and it was scraping the driveshaft. I doubt scrapage could alter the d/s performance in ANY way, but I just thought I'd mention it.

Thanks!

------------------
Elisha (Mustang Chick Extraordinaire)
1994 GT/Saleen: Cartech intake,4.10s, full exhaust, pulleys, Compucar nitrous kit 125 shot
Sold the 1986 LX sedan

http://www.geocities.com/mustangbelle_306
AOL name: GT306Chick

Unit 5302 · 03-31-2001, 12:52 PM

You have a siezed or partially siezed U-joint. It needs to be replaced immediately before you bend or damage your T-5's tailshaft.

A loose d/s would cause a serious clunk along with a vibration, a broken tranny mount will clunk upon changes between acceleration and deceleration. Since you have no clunk, those aren't the problems.

While the driveshaft can cause a vibration from throwing a weight (technically possible), you will not notice it at low speeds.

TEXSN95 · 04-02-2001, 12:04 AM

I had a bad vibration shaking the whole car back in january. My front ujoint was busted, and I'm lucky that it didn't come apart, drop to the road and catapult my car. It took me awhile to find that was the problem, and it sounds like that is your problem. I drove around with that for MUCH TOO LONG, so get it fixed before something bad happens darlin :-). Just use that as an excuse to get a nice shiny aluminum driveshaft.

------------------
Clint L.
White 95 Cobra #3637
R lookalike with lots of goodies

Godslayer · 04-02-2001, 12:41 PM

If the vibration increases with RPM and is not specific to a particular gear, or comes in at a specific RPM despite the gear, I would check the fan clutch. Mine went out at about 100k and caused the whole driveline and motor to shake. Too me a while to find it... just a suggestion.

------------------
87 GT
Full exhaust, K&N, KB Subs, BBK STB, homeade dumps...

87 Taurus
New York
Winters Bite!

jimberg · 04-02-2001, 12:58 PM

It is important to determine if the vibration occurs in every gear at a certain RPM, if it occurs throughout the RPM range, or if it only occurs in a certain gear.

If it's the first and you hear a ticking sound behind and to the right of you, it is probably the u-joint. If it is, spend the $150 and buy an aluminum drive shaft. It's a great price, easy install, and will gain you a little power.

If it's not at a specific RPM and in all gears, let us know what the complete symptoms are.

I broke my emergency brake cable a few years ago and probably won't replace it until I upgrade to Baer brakes. My guess is that the things are siezed by now anyway.

------------------
351W 89 Mustang GT Convertible

TEXSN95 · 04-02-2001, 03:44 PM

Quote:

Originally posted by Godslayer:
If the vibration increases with RPM and is not specific to a particular gear, or comes in at a specific RPM despite the gear, I would check the fan clutch. Mine went out at about 100k and caused the whole driveline and motor to shake. Too me a while to find it... just a suggestion.

Starting in 94 the Mustangs no longer have a fan clutch...FYI.

------------------
Clint L.
White 95 Cobra #3637
R lookalike with lots of goodies

joe4speed · 05-14-2001, 01:19 AM

Did you ever figure out this vibration, mustangbelle?
Just curious, because I haven't figured mine out yet!!

------------------
Joe!
1988 GT, 167,000 miles!!! 13.71@105mph Check out my listing! Click here! Or my website:
www.joe4speed.com
1999 Ninja ZX-6R 10.32@135mph!
1993 Olds Eighty Eight LSS

03-31-2001, 12:35 PM	#1
Mustangbelle306 Yay for Chickys Join Date: Feb 2001 Posts: 1,532	U joints? or driveshaft? Well after spending 6 hours stripping, sanding and primering the Rustang, I was driving home, and after I took off at a light, I noticed a vibration coming from the tranny, that has began to shake the whole car. I've asked around, and I'm hearing anything from transmisson mount, to driveshaft loose, to U joints. The car has over 100k miles, and this just started last night. It has been raining, so I haven't even bothered to look under the car. Also, I had some problems with my emergency brake bracket. I was..well ahem mad once, and pulled the e-brake handle up so hard that I ripped the bracket out of the floorboard, and it was scraping the driveshaft. I doubt scrapage could alter the d/s performance in ANY way, but I just thought I'd mention it. Thanks! ------------------ Elisha (Mustang Chick Extraordinaire) 1994 GT/Saleen: Cartech intake,4.10s, full exhaust, pulleys, Compucar nitrous kit 125 shot Sold the 1986 LX sedan http://www.geocities.com/mustangbelle_306 AOL name: GT306Chick

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03-31-2001, 12:52 PM	#2
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	You have a siezed or partially siezed U-joint. It needs to be replaced immediately before you bend or damage your T-5's tailshaft. A loose d/s would cause a serious clunk along with a vibration, a broken tranny mount will clunk upon changes between acceleration and deceleration. Since you have no clunk, those aren't the problems. While the driveshaft can cause a vibration from throwing a weight (technically possible), you will not notice it at low speeds.

04-02-2001, 12:04 AM	#3
TEXSN95 Registered Member Join Date: Mar 2001 Location: college station, tx Posts: 143	I had a bad vibration shaking the whole car back in january. My front ujoint was busted, and I'm lucky that it didn't come apart, drop to the road and catapult my car. It took me awhile to find that was the problem, and it sounds like that is your problem. I drove around with that for MUCH TOO LONG, so get it fixed before something bad happens darlin :-). Just use that as an excuse to get a nice shiny aluminum driveshaft. ------------------ Clint L. White 95 Cobra #3637 R lookalike with lots of goodies

04-02-2001, 12:41 PM	#4
Godslayer Registered Member Join Date: Mar 1999 Location: Largo, FL USA Posts: 274	If the vibration increases with RPM and is not specific to a particular gear, or comes in at a specific RPM despite the gear, I would check the fan clutch. Mine went out at about 100k and caused the whole driveline and motor to shake. Too me a while to find it... just a suggestion. ------------------ 87 GT Full exhaust, K&N, KB Subs, BBK STB, homeade dumps... 87 Taurus New York Winters Bite!

04-02-2001, 12:58 PM	#5
jimberg Registered Member Join Date: Oct 1998 Location: Rogers, MN Posts: 2,089	It is important to determine if the vibration occurs in every gear at a certain RPM, if it occurs throughout the RPM range, or if it only occurs in a certain gear. If it's the first and you hear a ticking sound behind and to the right of you, it is probably the u-joint. If it is, spend the $150 and buy an aluminum drive shaft. It's a great price, easy install, and will gain you a little power. If it's not at a specific RPM and in all gears, let us know what the complete symptoms are. I broke my emergency brake cable a few years ago and probably won't replace it until I upgrade to Baer brakes. My guess is that the things are siezed by now anyway. ------------------ 351W 89 Mustang GT Convertible

05-14-2001, 01:19 AM	#7
joe4speed He said Member...heh, heh Join Date: Sep 1999 Location: Jupiter, Florida U.S.A. Posts: 3,718	Did you ever figure out this vibration, mustangbelle? Just curious, because I haven't figured mine out yet!! ------------------ Joe! 1988 GT, 167,000 miles!!! 13.71@105mph Check out my listing! Click here! Or my website: www.joe4speed.com 1999 Ninja ZX-6R 10.32@135mph! 1993 Olds Eighty Eight LSS