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Mustang Flywheel Tech Info (96-14 Mod Motors)

Posted 4/2/2015 by Landan Durham

Have you been searching for the correct flywheel for your 96-14 Mustang? Check out our flywheel guide for all of the answers!

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The main difference everybody talks about on mod motor flywheels is whether it's six bolt or an eight bolt. Basically, that's just referring to the number of bolts it takes to retain the flywheel to the crankshaft.

To start off, the 1999 and 2000 Mustang GTs are a little confusing! Why? Well, there was a fire at the Romeo engine plant, meaning that they had to put Windsor motors from the F-150s into the Mustangs. The majority of your 1999, 2000, and even some of the early 2001 models are going to be Windsor based, and therefore have an eight bolt crankshaft. However, some did slip through with a six bolt crank. It is in your absolute best interest to check before you order a new flywheel.

When purchasing a new flywheel, there will be two main materials to choose from... billet steel and billet aluminum. A billet steel flywheel is going to be best used on the street, or in a drag race application, where you need that extra inertia to help you get off the line. A billet aluminum flywheel is best served in like a road race type application, where you want instant acceleration out of the corners. Either way, you can't go wrong, because mod motors really respond well to both.

Unlike your pushrod motors, you don't have a bunch of balances you have to worry about. All of your mod motors, whether it is a 4.6, 5.4 or 5.0, they're all going to be a zero balance, meaning they're all internally balanced in the engine. On your pressure plate bolts, you do have to make sure that you get the right ones, because your 10 1/2 inch clutch uses a different set of pressure plate bolts than your 11 inch clutches. While I'm at it,just to throw another wrench in there, pretty much all of your pressure plates are going to be 6 bolt, up until 2011. In late 2011, you went to a nine volt pressure plate that carried through to 2014. And that's pretty much the long and short of your flywheels for '96 to 2014 V8 cars.


Flywheel Info

6 Bolt Flywheel
  • 96-98 GT
  • Some 1999 & 2000 GTs
  • 01-04 GT
  • 05-10 GT

8 Bolt Flywheel
  • 96-98 Cobra
  • Some 1999, 2000, and early 2001 GTs
  • 99-01 Cobra
  • 03-04 Cobra
  • 03-04 Mach 1
  • 07-14 GT500
  • 11-14 GT

For more information, and to pick up a flywheel for your Mustang, check out lmr.com.


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About the Video

Ford Mustang Flywheel Review (96-14)

Check out our YouTube channel for even more tech tips, installation videos, how-tos, and more. The best place to go for anything Mustang related!

Published on 2014-11-05
We carry a variety of top brands including RAM, Ford Racing, & Exedy. In this video we break down the different flywheel types for your 96-14 Mustang.
Transcript

[MUSIC PLAYING] The main difference everybody talks about on mod motor flywheels is whether it's six bolt or an eight bolt. And that's just referring to the number of bolts it takes to retain the flywheel to the crankshaft. Your '96 to '98 GTs are all going to be six bolt, and your '96 to '98 Cobras are all going to be eight bolt. '99, 2000 gets a little sticky because there was a fire at the Romeo engine plant, meaning that they had to put Windsor motors from the trucks into the Mustangs. The majority of your '99, 2000, and even some of the early 2001 models are going to be Windsor based, and therefore have an eight bolt crankshaft. However, some did slip through with the six bolt. You really need to check before you order a flywheel.

Your '99 Cobra and your 2001 Cobra are both going to be eight bolt. Your '03, '04 Cobras are going to be eight bolt. '01 to '04 GT's are going to be six bolt. And your '03-'04 Mach Ones with the manual transmission are going to be eight bolt. '05 To '10 Mustang GTs with the 463 valve, those are all going to be six bolt. Your '07 to '14 GT500, those are all going to be eight bolt. And all of your '11 to '14 5.0Coyote motors, those are eight bolt, as well.

For you folks that have purchased an aftermarket long or short block that would contain a forged steel crank, more than likely it's eight bolt. So you need to plan that, if your car originally came with a six bolt crankshaft. If you're using a stock fly wheel, go ahead and have it resurfaced for your new clutch. But if you're purchasing a new flywheel, you have two main materials to choose from-- billet steel, and billet aluminum.

Your billet steel flywheel is going to be best used on the street, or in a drag race application, where you need that extra inertia to help you get off the line. Your billet aluminum is best served in like a road race type application, where you want instant acceleration out of the corners. Either way, you can't go wrong, because mod motors really respond well to both.

Unlike your pushrod motors, you don't have a bunch of balances you have to worry about. All of your mod motors, be it 4.6, 5.4 or 5.0, they're all going to be a zero balance, meaning they're all internally balanced in the engine. On your pressure plate bolts, you do have to make sure that you get the right ones, because your 10 1/2 inch clutch uses a different set of pressure plate bolts than your 11 inch clutches. And just to throw another wrench in there, pretty much all of your pressure plates are going to be 6 bolt, up until 2011. In late 2011, you went to a nine volt pressure plate that carried through to 2014. And that's pretty much the long and short of your flywheels for '96 to 2014 V8 cars. For more information, and to pick up a flywheel for your Mustang, check out latemodelrestoration.com.