Flywheel

Fuma23 · November 18th, 2010, 05:40 PM

Hi I have a question for a flywheel. I have a 99 GT and replaced the engine with a 04 GT. But once I accelerate the car starts to shake. The mechanic told me it was the flywheel that was not the right size. I got the flywheel from a junk yard. I dont know what car it came from but the mechanic told me it will fit the car. And it did fit but now the car shakes. If i dont accelerate the engine is so smooth it feels like its off. What size of flywheel do I need for my car. If its a 99 with an 04 engine. The car is manual. Any help would be greatly appreciated. No one can give me a good answer to my question. Thank you for your time.
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stal94gt · November 18th, 2010, 10:31 PM

there is no such thing as wrong size fly wheel, if it fits it fits. yes it may have to be balanced depending on what year car it came out of, some people get vibrations with their drive shaft being spun 180 out.

pumm3l · November 18th, 2010, 10:48 PM

I had some annoying vibrations with a piece of junk ebay flywheel because the alignment dowel holes didn't line up with the pressure plate so I didn't use them.

Lesson learned, don't cheap on out parts that are a bitch to replace if they cause problems. I replaced mine with a billet frpp flywheel and made sure to use the alignment dowels, no vibration.

stal94gt · November 18th, 2010, 11:06 PM

i dont have the alignment dowels in mine and it has run fine for years. no vibrations, the one you had probably was not the correct balance for the motor. im still using the oem one

almighty396 · November 18th, 2010, 11:25 PM

well from what i know 99-01 use an 8 bolt flywheel while mid 01-04 use a 6 bolt flywheel that maybe the problem. are you sure you have an 04 engine?

ndfrspd · November 19th, 2010, 03:23 AM

well theres your problem. "i bought a flywheel from a junkyard." come on bro, you can't honestly expect to put a junkyard part on the end of your crankshaft, that spins at all kinds of low and high rpms and not know where the part has been, what the condition is, so on and so on. like my mans said above me, dont cheap out on mechanical shit that will be a bitch to replace if it doesnt work out.

save some cash, buy yourself a beautiful billet flywheel from americanmuscle and i guarantee you will love it.

SWEET2KSTANG · November 19th, 2010, 04:04 AM

^why not? a flywheel is a flywheel, and wont matter if its from ford or salvage yard. if its in spec and no physical damage, then its fine to use.

SWEET2KSTANG · November 19th, 2010, 04:06 AM

ALL 4.6 are neutral balanced. i have heard horror stories about ebay flywheels with a different balance, but i yet to see any type of proof. as for the vibration, it sounds like a balance or loose part issue.

rotten · November 19th, 2010, 09:54 AM

I think you should change mechanics .

Geno · November 19th, 2010, 10:02 AM

Originally Posted by SWEET2KSTANG

^why not? a flywheel is a flywheel, and wont matter if its from ford or salvage yard. if its in spec and no physical damage, then its fine to use.

I agree. Not much can go wrong with a flywheel. I personally would run a flywheel from a salvage yard before using a cheap ebay piece of crap.

Fuma23 · November 19th, 2010, 10:07 AM

I think its the balance. Thank you for your help.

Geno · November 19th, 2010, 10:07 AM

Originally Posted by Geno

I agree. Not much can go wrong with a flywheel.Have it resurfaced and your good to go. I personally would run a flywheel from a salvage yard before using a cheap ebay piece of crap.

Wait ,I did use one from a salvage yard on my swap. Bought one from Oreillys first and it had "made in China" stamped on it so I took it back.

Fuma23 · November 19th, 2010, 10:18 AM

The flywheel from the salvage was in great conditions. With the Ford stamp But the flywheel he removed from my old engine was smaller then the one from the salavge. There was a big change in size. At the yard they told me it was from an 04 mustang. It was next to an 04 engine but not on it. But this is what i get for taking shortcuts. Thank everyone i will replace the flywheel for a new one.

rotten · November 19th, 2010, 10:23 AM

size it either 10.5 or 11" and there all zero balanced , i would seroiusly goto a diffrent mechanic .
You need to describe the issue more , is the lurking shaking when engaging the clucth ? or is it vibrating when in gear and accelerating ?

Fuma23 · November 19th, 2010, 10:26 AM

Only accelerating and the RPM's go down. Do you think its the flywheel or something els?

rotten · November 19th, 2010, 10:30 AM

that's something else, I'd look at the driveshaft .

Fuma23 · November 19th, 2010, 10:34 AM

Yes also in neutral if i press the gas it shakes and wont stop till the RPM's are down. But after that the engine is smooth.

rotten · November 19th, 2010, 10:38 AM

Originally Posted by Fuma23

Yes also in neutral if i press the gas it shakes and wont stop till the RPM's are down. But after that the engine is smooth.

he said it does , DId you replace the pilot bearing ?

rotten · November 19th, 2010, 10:40 AM

wTF delelted posts ?

Geno · November 19th, 2010, 10:43 AM

The pilot bearing would have no effect on it in neutral would it?

November 18th, 2010, 05:40 PM	#1
Fuma23 Newbie 1999 Mustang GT Join Date: Nov 2010 Location: Texas Posts: 6 iTrader: 0 reviews	Flywheel Hi I have a question for a flywheel. I have a 99 GT and replaced the engine with a 04 GT. But once I accelerate the car starts to shake. The mechanic told me it was the flywheel that was not the right size. I got the flywheel from a junk yard. I dont know what car it came from but the mechanic told me it will fit the car. And it did fit but now the car shakes. If i dont accelerate the engine is so smooth it feels like its off. What size of flywheel do I need for my car. If its a 99 with an 04 engine. The car is manual. Any help would be greatly appreciated. No one can give me a good answer to my question. Thank you for your time. Edit Report

November 18th, 2010, 10:48 PM	#3
pumm3l Regular 1999 Mustang GT 12.09@117.87 Join Date: Sep 2007 Location: Pottstown, PA Posts: 244 iTrader: 0 reviews	I had some annoying vibrations with a piece of junk ebay flywheel because the alignment dowel holes didn't line up with the pressure plate so I didn't use them. Lesson learned, don't cheap on out parts that are a bitch to replace if they cause problems. I replaced mine with a billet frpp flywheel and made sure to use the alignment dowels, no vibration. __________________ 99 GT - 462 rwhp / 405 rwtq L&M Engines tuned - SStang.com

November 19th, 2010, 03:23 AM	#6
ndfrspd Enthusiast 1998 Mustang GT 1:34.43@13.86 Join Date: Sep 2008 Location: Detroit Posts: 679 iTrader: 0 reviews	well theres your problem. "i bought a flywheel from a junkyard." come on bro, you can't honestly expect to put a junkyard part on the end of your crankshaft, that spins at all kinds of low and high rpms and not know where the part has been, what the condition is, so on and so on. like my mans said above me, dont cheap out on mechanical shit that will be a bitch to replace if it doesnt work out. save some cash, buy yourself a beautiful billet flywheel from americanmuscle and i guarantee you will love it. __________________ "The only way to learn about a car truly is to break something and fix it yourself..."

November 19th, 2010, 04:04 AM	#7
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	^why not? a flywheel is a flywheel, and wont matter if its from ford or salvage yard. if its in spec and no physical damage, then its fine to use. __________________ project warhorse under construction wagon burner under construction as well (04 lightning) being built by MP2 Performance

November 19th, 2010, 04:06 AM	#8
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	ALL 4.6 are neutral balanced. i have heard horror stories about ebay flywheels with a different balance, but i yet to see any type of proof. as for the vibration, it sounds like a balance or loose part issue. __________________ project warhorse under construction wagon burner under construction as well (04 lightning) being built by MP2 Performance

November 18th, 2010, 10:31 PM	#2
stal94gt I Post Entirely Way Too Much 2003 mustang v6 ;) slow Join Date: May 2010 Location: eglin afb florida Posts: 10,197 iTrader: 2 reviews	there is no such thing as wrong size fly wheel, if it fits it fits. yes it may have to be balanced depending on what year car it came out of, some people get vibrations with their drive shaft being spun 180 out.

November 18th, 2010, 11:06 PM	#4
stal94gt I Post Entirely Way Too Much 2003 mustang v6 ;) slow Join Date: May 2010 Location: eglin afb florida Posts: 10,197 iTrader: 2 reviews	i dont have the alignment dowels in mine and it has run fine for years. no vibrations, the one you had probably was not the correct balance for the motor. im still using the oem one

November 18th, 2010, 11:25 PM	#5
almighty396 Regular 2003 mustang gt Join Date: Aug 2010 Location: lehigh acres FL Posts: 223 iTrader: 0 reviews	well from what i know 99-01 use an 8 bolt flywheel while mid 01-04 use a 6 bolt flywheel that maybe the problem. are you sure you have an 04 engine?

November 19th, 2010, 09:54 AM	#9
rotten Regular SA XD40 Join Date: May 2010 Location: Strinestown/York Haven , Pa Posts: 313 iTrader: 0 reviews	I think you should change mechanics . __________________ 09 crf450x super motard. 06 f250 powerstroke 04 cbr1000rr 03 rsx-s

November 19th, 2010, 10:07 AM	#11
Fuma23 Newbie 1999 Mustang GT Join Date: Nov 2010 Location: Texas Posts: 6 iTrader: 0 reviews	I think its the balance. Thank you for your help.

November 19th, 2010, 10:18 AM	#13
Fuma23 Newbie 1999 Mustang GT Join Date: Nov 2010 Location: Texas Posts: 6 iTrader: 0 reviews	The flywheel from the salvage was in great conditions. With the Ford stamp But the flywheel he removed from my old engine was smaller then the one from the salavge. There was a big change in size. At the yard they told me it was from an 04 mustang. It was next to an 04 engine but not on it. But this is what i get for taking shortcuts. Thank everyone i will replace the flywheel for a new one.

November 19th, 2010, 10:23 AM	#14
rotten Regular SA XD40 Join Date: May 2010 Location: Strinestown/York Haven , Pa Posts: 313 iTrader: 0 reviews	size it either 10.5 or 11" and there all zero balanced , i would seroiusly goto a diffrent mechanic . You need to describe the issue more , is the lurking shaking when engaging the clucth ? or is it vibrating when in gear and accelerating ? __________________ 09 crf450x super motard. 06 f250 powerstroke 04 cbr1000rr 03 rsx-s

November 19th, 2010, 10:26 AM	#15
Fuma23 Newbie 1999 Mustang GT Join Date: Nov 2010 Location: Texas Posts: 6 iTrader: 0 reviews	Only accelerating and the RPM's go down. Do you think its the flywheel or something els?

November 19th, 2010, 10:30 AM	#16
rotten Regular SA XD40 Join Date: May 2010 Location: Strinestown/York Haven , Pa Posts: 313 iTrader: 0 reviews	that's something else, I'd look at the driveshaft . __________________ 09 crf450x super motard. 06 f250 powerstroke 04 cbr1000rr 03 rsx-s

November 19th, 2010, 10:34 AM	#17
Fuma23 Newbie 1999 Mustang GT Join Date: Nov 2010 Location: Texas Posts: 6 iTrader: 0 reviews	Yes also in neutral if i press the gas it shakes and wont stop till the RPM's are down. But after that the engine is smooth.

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November 19th, 2010, 10:40 AM	#19
rotten Regular SA XD40 Join Date: May 2010 Location: Strinestown/York Haven , Pa Posts: 313 iTrader: 0 reviews	wTF delelted posts ? __________________ 09 crf450x super motard. 06 f250 powerstroke 04 cbr1000rr 03 rsx-s

November 19th, 2010, 10:43 AM	#20
Geno Regular 01 Mustang GT 12.7126@109.65 Join Date: Oct 2009 Location: Missouri Posts: 150 iTrader: 1 reviews	The pilot bearing would have no effect on it in neutral would it? __________________ MM SUPERSHIFTER

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