91 Mustang GT w/ Excessive Vibration

chozenfew805 · June 18th, 2008, 03:12 PM

I just bought my GT before deployment and threw in a King Cobra Clutch Kit, brand new engine mounts, transmission mount, and a Ford Racing Firewall Clutch Adjuster. Well the hangers on the stock exhaust busted off and took it to a very reputable exhaust shop to get a sturdy set of hangers to welded on. After I took it in, I used the Mustang to pick my wife up from work and on the way home the hangers busted off and flew from the bottom of my undercarriage. I brought the car back to get new hangers put on today and got some advice from the guys at the exhaust shop. They said either the clutch is out of balance or missing some hardware on one or more of the mounts. I just want to know if anyone has some advice on where I should start.

Squints · June 18th, 2008, 07:27 PM

did it just start doing it when you got the clutch put in?

is it only vibrating under load? only while driving? if so, at what speeds/rpm? does it do it in neutral while sitting still and revving?

fakesaleen · June 18th, 2008, 10:42 PM

did you change the clutch quadrant the two peice plastic one might not stay adjusted correctly with that clutch

91cobra5.0 · June 18th, 2008, 11:18 PM

your 91 doesnt have an automatic clutch cabel adjuster???

TurboLX · June 18th, 2008, 11:22 PM

did you cut the flywheel?

fogged306 · June 18th, 2008, 11:52 PM

They're not solid mounts for the engine or trans are they?

91cobra5.0 · June 19th, 2008, 01:25 AM

did you tighten your bell housing to engine and tranny to bell housing bolts????

June 18th, 2008, 03:12 PM	#1
chozenfew805 Newbie Join Date: Sep 2007 Posts: 2	91 Mustang GT w/ Excessive Vibration I just bought my GT before deployment and threw in a King Cobra Clutch Kit, brand new engine mounts, transmission mount, and a Ford Racing Firewall Clutch Adjuster. Well the hangers on the stock exhaust busted off and took it to a very reputable exhaust shop to get a sturdy set of hangers to welded on. After I took it in, I used the Mustang to pick my wife up from work and on the way home the hangers busted off and flew from the bottom of my undercarriage. I brought the car back to get new hangers put on today and got some advice from the guys at the exhaust shop. They said either the clutch is out of balance or missing some hardware on one or more of the mounts. I just want to know if anyone has some advice on where I should start. __________________ 91 Mustang GT -King Cobra Clutch -Power Adder Intake

June 18th, 2008, 07:27 PM	#2
Squints Enthusiast 1986 Mustang GT Join Date: Dec 2007 Location: Chesapecker,VA Posts: 675	did it just start doing it when you got the clutch put in? is it only vibrating under load? only while driving? if so, at what speeds/rpm? does it do it in neutral while sitting still and revving? __________________ MILITARY CREW AT2

June 18th, 2008, 10:42 PM	#3
fakesaleen Regular Join Date: Feb 2006 Location: Port Huron, MI. Posts: 394	did you change the clutch quadrant the two peice plastic one might not stay adjusted correctly with that clutch __________________

June 18th, 2008, 11:18 PM	#4
91cobra5.0 Hardcore Enthusiast 91 mustang 266 ftlbs 191 hp (15.138 @92.91) @5000ft elevation Join Date: Jan 2008 Location: colorado springs Posts: 1,450	your 91 doesnt have an automatic clutch cabel adjuster??? __________________ Fender well cold air intake, 3:73's, eibach springs, 65mm TB, electric fans, 3g upgrade, smog delete, advanced timing, MSD cap and rotor, ford racing 9mm plug wires, 75mm Pro-M MAF, flowmaster sieres 40 delta flows

June 19th, 2008, 01:25 AM	#7
91cobra5.0 Hardcore Enthusiast 91 mustang 266 ftlbs 191 hp (15.138 @92.91) @5000ft elevation Join Date: Jan 2008 Location: colorado springs Posts: 1,450	did you tighten your bell housing to engine and tranny to bell housing bolts???? __________________ Fender well cold air intake, 3:73's, eibach springs, 65mm TB, electric fans, 3g upgrade, smog delete, advanced timing, MSD cap and rotor, ford racing 9mm plug wires, 75mm Pro-M MAF, flowmaster sieres 40 delta flows

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June 18th, 2008, 11:22 PM	#5
TurboLX IT'S TURBO TIME 1990 Mustang LX Turbo 9.71@151.6 mph Join Date: Oct 2006 Location: NY Posts: 8,740	did you cut the flywheel?

June 18th, 2008, 11:52 PM	#6
fogged306 Hardcore Enthusiast 89 GT Join Date: Apr 2007 Location: Did you get that thing I sent you? Posts: 1,265	They're not solid mounts for the engine or trans are they?

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