I have a th350 in my car was already installed when i got it it has a regular foward facing vavle body the problem im having it wont go into first at all some say needs a vaccum but as of right now it will shift on its own but wont kick down when i jump on it it has a b&m shifter in it too i know some may be due to the linkage but it will shift out way to early around 5k....

 

It will shift out of gear even if I don't shift it!

 

Nevermind i got it no thanks to this place!