For the stalling issues, check for vacuum leaks and check the idle air control valve (IAC). Also, scan the computer for trouble codes. As far as the shifting, scan the computer to see if there are any trouble codes related to the transmission. You could just have a bad shift solenoid. Keep in mind, I am assuming that the trans fluid is clean and full.
If you decide to have the computer scanned, most parts stores will do it for free.
SPONSORED LINKS
Monday, January 21st, 2013 AT 7:53 PM