I've a 2006 Cobalt SS S/C
I changed the clutch for a centerforce kit (pressure plate disk and flywheel with the gm throw out bearing) after installing the kit we got a oil leakage problem (dot 3 brake fluid)
that appeared to come out of the transmission. the mechanic checked the issue and fixed the problem which was the connection link between the tranny and the brake fluid reservoir wasn't well connected as he told me

after fixing this now i'm experiencing rough shifting which wasn't the case in the beginning

any help please thanks in advance

 

Try bleeding the system more. Sounds like your air bound

 

does the clutch system (pressure plate and disk )of the turbocharged cobalts fits the supercharged cobalt?

 

I believe the GMPP LSJ clutch is the LNF unit. If someone can verify this, I have a used one, flywheel, disc, slave cyl & pressure plate I'll sell reasonable. $350 shipped complete to conti US. 20K miles on it, just wouldn't hold my torque anymore.

 

that's my problem i changed like 4 clutch sytem already 2 was from SPEC stage 2+ everything new Flywheel clutch+pressureplate and throw out bearing had problem shifting on high revolution wasn't worth the money!

went to try a combination of stock new pressure plate with new spec clutch plate didn't function well

went to centerforce complete new set did it for some time but isn't doing it well anymore
and i want to fix this issue for once and for all now

 

fixed without changing the clutch system
thanks for all replies!!!

 

What was the solution? Vacuum bleed it?