diesel engine to gas conversion with T-400 trans
My question is. I have a th400 in my 1ton gmc that was originally mated to a 6.2 diesel. The 6.2 is long since been replaced but the trans is still set up to run off vaccum like a diesel. It has no kick down. Its shifts real early no matter how hard I run it unless I manually run it through the gears. It won't kickdown going up hill unless I am going really slow. How can I convert it to run properly behind my 406? Do I need to disconnect the vaccum hose and get a kick down and micro switch for a th400 or can I adjust the vaccum modulator? Thanks in advance guy.