Transmission
 

Hello,
I'm new at this, so please be patient.
I have a 1995 Seville STS in great condition, just aweek ago, my engine light started to come on and my engine would rev really low when i come to a stop, then the engine would turn off.. It would seem that the engine wasn't getting enough gas. Had it tested, they said it was the Fuel control valve.
A few days ago my transmission started to act up, any speed over 40miles and my transmission would go into neutral then once i would be less than 15miles it would shift into gear, now i can't drive passed 40miles.
Had anyone ever experienced this?
Cheers!