ok I'm building a 406 smallblock for my 84 Trans Am

I'm running a T-5

the 168 tooth hays flywheel for my the 406 I ordered doesn't fit in the stock T-5 bellhousing I want to know if anyone knows how I make this work, changing flywheel? bigger bellhousing? will it fit in the car? etc....

You'll need to have your stock T-5 flywheel "unbalanced" at a machine shop to 400 specs.

Or find some type of aftermarket flywheel....

I didn''t have a problem using my stock T-5 flywheel, but my engine is internally balanced.

the aftermarket "weight" that bolts between the flywheel and crank works fine.

aftermarket flywheel works fine.

getting your engine rebalanced works fine.

I had the smae problem with my flywheel, I'm using a 2 piece rear main block so I needed a flywheel to work, after searching all over the place I finally found one at work when I was lookin through our gm performance parts catalog, it's a light weight flywheel, worked great for me.

You must have a 158 tooth flywheel to work in the T5 bellhousing. Summit has an externally balanced 2 piece rear main seal one made by Mcleod. That's what I got to use on my 383, works fine.

ummm, I thought it was a 153?

It is.

OOPS, my bad. You're right, it is 153 teeth. Too little sleep the last few days, sorry.

Thats alright, me and my brother worked 7 days strait, morning to night doing the V6 > V8 swap, and only when we went to start it did we realize we put the wrong flywheel on! Its a mistake that people that have worked on cars as long as we have should never make, but sleep deprivation does wierd things to a persons brainwaves.

no offense to you guys that answered me, thanks for trying to help....but ya....first off how can u have an internally blanced 400? 400s are external balanced using harmanic balancer and flywheel -shrugs-

ummm and a 383 isn't a small block 400 it's a 350, they are 2 different monsters....I will look into what you guys told me. but that I'm still questioning your guys answers

I have a large 168 tooth flywheel from hays that is built to handle the hp's +++ I'm planning on having, I'm trying to figure out if we can get a bellhousing the the flywheel will fit in that'll bolt to a T-5 and fit in the F-body....

flywheel is 14 1/2 inch in diameter

Uh, yeah, a stock 400 IS externally balanced. How can you have an internally balanced 400 you ask? By using an aftermarket crankshaft, rods and pistons (like me) and having the assembly neutrally balanced. I use a standard T-5 flywheel and 350 balancer on my 408 right now.

A 383 uses a 350 block with a stock 400 crank - or again, an aftermarket crank.

That flywheel AFAIK, won't fit in the T-5 bell housing, but feel free to try. I think you need a 153 (or is it 158) tooth flywheel.

You don't have to question any of the answers here. Just do a search.....

FYI I'm not being an *******, I'm just getting stressed out trying to figure this out....if you knew what I've been threw over the last year, you would understand....

it just seems hard finding the right answers sometimes

I know my flywheel doesn't fit the bellhousing.... I just prefer using the 168 tooth, but I'm sure they make strong ones with the 15X tooth

I'll probably end up sending the 168tooth back and just use one that'll fit, I'm having my motor blanced anywho so it should all work fine.....

regardless I appreciate everyones help

The number of starter engagement teeth doesn't make it any stronger.

Besides, how strong does a flywheel have to be?

:word: flywheel isn't really a problem, just something we ****ed up one, plain and simple

Go right ahead. One of the solutions I suggested was roaming the street tonight. 400, '85 f-body flywheel, T5, and 3.73 rear. No vibration issues.

The other solution I suggested does the same thing, that is... an aftermarket flywheel being balanced for a 400/383.

Get a Lakewood scattershield to fit the 168 you have, or do one of the things I posted. I'll let you figure out which costs less.

Hey! I didn't read you're post close enough!!....if you are getting the engine balanced anyways, and this is just my opinion...get an aftermarket crank, rods, pistons and get it neutral balanced.

At least it allows you to throw the engine in any chassis and not have to worry about finding "unbalanced" flexplates, flywheels and balancers. Then for now, you can use your stock T-5 flywheel, and get a G Force or Tremec 5 speed tranny for all that torque later on!

I'm still talking to a few local people about possibly making it work...... then when we figure out if it works or not, which it probably wont atleast not any cheaper then I hope, we'll end up using the smaller flywheel.....
:lala:
I'll let ya know what happens