Need help identifying a flywheel for 5-Speed swap

[Schmieder]

1996 Grand Prix SE
3100 SFI v6 (L82)
4T60e

Project: 5-Speed swap

Using parts from an 88 Grand Prix 5-Speed. The flywheel does not fit. It is a match all around but the 6 bolt pattern is 1/8" larger in diameter and the offset is slightly different.

I need a flywheel to fit my crank for a manual trans swap. Anyone know what year/model/engine flywheel will fit a 3100 SFI v6?

Thanks

[pocket-rocket]

2200 Cavi?

[Superdave]

all the 60v6's have the same flywheel pattern (at least up to the 3500 gen 3), your '88 flywheel should bolt up fine.

I guess you could compare part numbers with one for a 91 Cavalier 3.1 but the Jbody guys have been bolting stock 2.8 and 3.1 flywheels up to gen3's for almost 10 years now.


Make 100% sure you use the longer bolts for the flywheel and not the short flex plate ones. If not you'll have a serious failure.

[CNCguy]

What Dave said plus the LZ VVT engines use the same flywheel also. I am using a 3.1L Beretta flywheel on my 3900.

[Schmieder]

2200 Cavi?

I had found the 2.2L Sunfire has the flywheel I need, I think. You about confirmed one I am looking at buying for roughly $60.

all the 60v6's have the same flywheel pattern (at least up to the 3500 gen 3), your '88 flywheel should bolt up fine.

I guess you could compare part numbers with one for a 91 Cavalier 3.1 but the Jbody guys have been bolting stock 2.8 and 3.1 flywheels up to gen3's for almost 10 years now.


Make 100% sure you use the longer bolts for the flywheel and not the short flex plate ones. If not you'll have a serious failure.

The issue is...I have a flywheel that will not bolt up. I will get a pic up soon. But no matter how it is lined up, it will not bolt up. So I probably have a non-gm v6 flywheel.

As far as longer bolts...phew, you saved me from that failure! Thanks man, that was a REAL great piece of advise. And I can clearly see why, less threads to bite into the crank.



Another question if you guys don't mind......Can I use a more recent 3100 flywheel that is much lighter? I read the 3100/3400 had lighter flywheels after (2001 was it?). Might be a stupid question since I'm told all gm 60v6 flywheels mate up.

[robertisaar]

since when did any 3x00 come with a flywheel?

[Schmieder]

since when did any 3x00 come with a flywheel?

lol, ah ok. You got me, my mistake.

But I did read somewhere (I forget, too much online researching) that a certain year passed and the flywheels that were used were made lighter.

forget that idea................................

How about this.

Is there a higher performing flywheel that will work with the 3100 and getrag 282 combination?

if not, what would be the best yr/model to get a flywheel from for a 3100/getrag 282 combination?

If anyone knows, I believe you would.

[robertisaar]

IIRC, Fidanza(?) makes an aluminum flywheel intended for 2.8 5 speed fieros(282s).... probably pricey though.

all of the factory flywheels that would work should be more or less identical though.

EDIT: seems they list it for a 282 equipped GP as well.

http://www.streetperformance.com/SPEEDgate/Fidanza/f_productdisplay.php?brandID=101343&VehicleID=10513&EngineConfigID=1195&sku=1404919&hdwt=31101&loc=101&dealer=no&company_id=101343

[Schmieder]

Flexplate on left - Unknown Flywheel on right (sure as hell will not bolt up w/o a doubt)

IIRC, Fidanza(?) makes an aluminum flywheel intended for 2.8 5 speed fieros(282s).... probably pricey though.

OMG! - That IS pricey, lol. Probably way beyond what I need. A standard flywheel is good enough (especially if it's less then $90)

[Superdave]

Yah, that's not a 60v6 flywheel for sure.. lol


the Fidenza ones are nice but people have complained about them on gen3's. I always ran the steel ones with my 3500/HM282 and never had a problem.

[pocket-rocket]

Both of mine have served me well, and I agree with Dave, that one on the right is not a 60v6 flywheel (I've never seen one on a 60v6 or a 2200 with 6 holes around the outside). On the note of the flywheel bolts, I don't remember if I used flexplate bolts or flywheel bolts in the 91 (probably flywheel since the donor car was 30-40 feet from the 91), but now would be an ideal time to toss some ARP's at it.

[Schmieder]

Both of mine have served me well, and I agree with Dave, that one on the right is not a 60v6 flywheel (I've never seen one on a 60v6 or a 2200 with 6 holes around the outside). On the note of the flywheel bolts, I don't remember if I used flexplate bolts or flywheel bolts in the 91 (probably flywheel since the donor car was 30-40 feet from the 91), but now would be an ideal time to toss some ARP's at it.

Yeah, after Dave mentioned not using the bolts I had a feeling wot-tech sold the ARP's. Sure enough, they do. Even though I REALLY don't want to spend another $40 just for bolts, but not having to worry about the alternative.....priceless.

That would be a mess. A heavy flywheel breaking free at high rpm's with gear teeth. And if it doesn't fully break free, what does it do anyways?

lol, it kicks out to the ground and bounces back up through the floor into the drivers crotch. I dont know, just a dead car on the side of a road, boooooring.