my question is. Can u up date a transmission converter on the the car for higher shifting?
yes you can you might want to take a look at summit racing
The converter won't necessarily change the shifting.
Bob is right, depends on other variables, like gearing and such. So even though another convertor is rated for a higher RPM at lockup, it doesn't mean it will, depends on your application.
Looking for a Used Grand Am in your area?
CarGurus has 1,994 nationwide Grand Am listings starting at $1,995.
Search Pontiac Grand Am Questions
Pontiac Grand Am Experts