Yes, the transmission said no to 3rd gear after turn 1 lap 1.
Yes, the car is slow out of the hairpins, should have downshifted to 2nd in a few spots but didn't, because of reason above. 
Set up: 3340# / 251whp / 295R7's / -3% flat tune / -3% rear aero
Effective comp weight/power: 13.3:1
Fastest Lap of the weekend (Saturday practice): 2:30.177
Qualified 3rd: 2:30.478
Race finishes: 3rd, 6th, 6th, 2nd Overall weekend finish: 3rd