Hi all

I haven't heard of anyone with a Jbody using any of the Exedy racing products that they offer. I haven't been thrilled with what I've seen from Spec or some of the other clutch makers out there (no offense to anyone who has had success with them and swears by them). Now I know that the parts listed below are for Cobalt/G5/HHR with L61's and F23's, but I have found out that it appears we can run them on our cars with no modification. It seems that Exedy is missing out by not offering these to the Jbody world.

Stage 2 Cerametallic 3-puck design, Exedy PN 04950 ~ $340-360
Lightweight one-piece chromoly flywheel, Exedy PN GMK1010 ~ $300-350

Now maybe I'm wrong and someone in the Jbody world has run these before, but I'm not aware of anyone doing so. Exedy has a pretty good reputation around engineering circles that I'm in and I think I'm going to give the clutch a try. Not sure if I'm going to try the flywheel, but it would seem to be a more robust design than the lightweight aluminum flywheels out there. Both seem quite reasonably priced as well.

If anyone has used these, let me know your thoughts. But if no one hasn't, I guess I'll take one for the team and give it a shot. If anyone is interested in how they work, I'd be happy to provide an update.


"If you aren't shifting, then you certainly aren't driving!"

They are very popular in the cobalt market...


-Aaron
www.TurboTechRacing.com

Performance Parts For Cavalier, Sunfire, Cobalts and More!!!

hmmmm... lightweight chromoly flywheel.

no doubt ecotec only though...



180hp in 1989 or 145hp in 2002, you decide. >

the exedy stuff for the cobalt should work with the F23 in the jbody, I concur.

also clutches for the 2.4 ecotec should be a direct swap for the 2.2 in the jbody because they use the same bolt pattern and flywheel.

When its time to upgrade the clutch in my 2004 I know I'm going to see what exedy can do for me.

DaFlyinSkwirl (Pj) v2.0 wrote:the exedy stuff for the cobalt should work with the F23 in the jbody, I concur.

also clutches for the 2.4 ecotec should be a direct swap for the 2.2 in the jbody because they use the same bolt pattern and flywheel.

When its time to upgrade the clutch in my 2004 I know I'm going to see what exedy can do for me.

you'll say cavalier and they will chuckle and say there is no market, at
least that's what I was told



R.I.P. Brian Klocke, you will never be forgotten

I have the 2.4 LD9 clutch hehe, I love the look, and its a stock like feel, but stiffer pedal, im meaning engage points are like stock lol, flywheel I can not say anything about


"As I lay rubber down the street, I pray for traction I can keep, but if I spin and begin to slide, please dear God protect my ride." -Amen

I dunno if it will work. I was thinking the same thing when I was looking for a clutch for my sunflower and I did some research .Every clutch kit I've ever found for the Cobalt 2.2 is 15/16 spline diameter, meanwhile the J's use a 1 inch diameter spline shaft.




Currently #4 in Ecotec Forced Induction horsepower ratings. 505.8 WHP 414WTQ!!!
Currently 3rd quickest Ecotec on the .org - 10.949 @ 131.50 MPH!!!

^^ looks like the disc won't work, but flywheel will... maybe



13.3 @ 106 mph Cammed

Roofy wrote:I dunno if it will work. I was thinking the same thing when I was looking for a clutch for my sunflower and I did some research .Every clutch kit I've ever found for the Cobalt 2.2 is 15/16 spline diameter, meanwhile the J's use a 1 inch diameter spline shaft.

DAMN! I was seriously getting my hopes up. What would prompt GM to make such a minor yet irritating change to spline diameter??

why not just use the input shaft of a newer trans in your trans then?

Dave De Stefano wrote:why not just use the input shaft of a newer trans in your trans then?

Because it would probably be more time consuming and expensive than just buying a J body clutch. And unless the Cobalt Getrags are a hardened shaft from the factory, the physically larger J body shaft should be stronger.




Currently #4 in Ecotec Forced Induction horsepower ratings. 505.8 WHP 414WTQ!!!
Currently 3rd quickest Ecotec on the .org - 10.949 @ 131.50 MPH!!!

I'm not sure that is correct about the spline diameter. Pretty sure all F23's use the same input shaft. I will verify this.


"If you aren't shifting, then you certainly aren't driving!"

Your text to link here...
^Cobalt clutch kit with specs
Your text to link here...
^Cavalier clutch with specs




Currently #4 in Ecotec Forced Induction horsepower ratings. 505.8 WHP 414WTQ!!!
Currently 3rd quickest Ecotec on the .org - 10.949 @ 131.50 MPH!!!

After going through Rock Auto's catalog (which has yet to let me down), it looks like 2.2 cobalt clutches are NOT interchangable with jbody 2.2 ecotec clutches - as noted above, it says the shaft diameter is different by 1/16", although the spline count is the same - 14. Since cobalt 2.2 and 2.4 clutches are interchangable, does that infer that the 2.4 stuff won't work with the jbody 2.2 as well?

Now I'm kinda worried about my 2.4 bottom end swap - if the input shaft is a different diameter, i may be screwed into getting a cobalt tranny?

There was an Exedy OEM style replacement in their catalog though. It was ~250 which is pretty cheap IMO.

I guess the search continues

Hmm that is interesting about the different sized input shafts. I wasn't aware that the Cobalt's is supposedly bigger. Flywheels are the same though, so those are definetly a Jbody option. I still want to confirm that it is truly larger by that small amount. Could be a typo or a rounded number by an uninformed person? You never know. J's get no respect!


"If you aren't shifting, then you certainly aren't driving!"

^^Cavy shaft is bigger according to rock and what Roofy posted. I would love to find out they are still interchangable though!

I just looked at some items...I think they're the same. I will confim with the trans engineer when he calls me back.


"If you aren't shifting, then you certainly aren't driving!"

silvercav02 wrote:I just looked at some items...I think they're the same. I will confim with the trans engineer when he calls me back.

Any word on this? I'm buying this week and going with the exedy flywheel. I'd love to get the clutch as well, if it works!

Yes sorry for the delay. All F23's have the same input spline. It's a common GM 14 spline size. All of these measurements from different vendors are likely just rounded numbers up or down or they're just measured wrong. There is actually a special tool needed to correctly measure these spline diameters. Calipers aren't the "correct" way to do it, but that is likely why we see varying numbers.
Now I was planning to be the first to do this and take one for the team, but if you're willing to try it, I see no reason why you should worry. All dimensions, bolt patterns, splines, and hydraulic gear should work without issue.


"If you aren't shifting, then you certainly aren't driving!"

Hey oldskool - I'll be working with Exedy technical support on Monday. Maybe you should wait until I can speak to them just to make 100% sure. Perhaps they have made changes on their end that I'm not aware of. I just don't want some unforseen issue to crop up and for you to be out some cash. I can keep you guys updated.


"If you aren't shifting, then you certainly aren't driving!"

silvercav02 wrote:Hey oldskool - I'll be working with Exedy technical support on Monday. Maybe you should wait until I can speak to them just to make 100% sure. Perhaps they have made changes on their end that I'm not aware of. I just don't want some unforseen issue to crop up and for you to be out some cash. I can keep you guys updated.

The flywheel should work no problem, since all the other wheels are interchangeable between cobalts and jbodies. Aaron at TTR just told me that cobalt drivers who attempted to use cavalier clutches have had problems. So, for me this is a no go. I cannot afford to much downtime.

Did he say what kind of problems? Like fitment issues or hydraulic related? Could really help to know what the issues were.


"If you aren't shifting, then you certainly aren't driving!"

He didn't say, but if you email him, i'm sure he will give you details. TTR is THE BEST at customer service.

OE style replacement clutch kit is excellent for the 03 Cavalier. Would be nice to know if the Cobalt Clutch would indeed work. Exedy makes great quality products.



Milt Burns, milt@neverenoughauto.com 877-609-6727

oldskool wrote:He didn't say, but if you email him, i'm sure he will give you details. TTR is THE BEST at customer service.

Thanks!

From what we understand it is the slave cylider that is different.


-Aaron
www.TurboTechRacing.com

Performance Parts For Cavalier, Sunfire, Cobalts and More!!!