Automatic gearbox questions...
Got it pretty cheap cuz the auto gearbox slips on gears,well the seller told me it has an 305 engine with an TH700 gearbox.
That gearbox only got 3 speed and i would like to replace it with a 4 speed gearbox.
Is there any gearbox that i could bolt on without any modification to the engine or the rest of the car that i can use for my Pontiac???
Crazy Sweed looking for some help...


