what size transmission is this on my buick century?

[C. J]

It's a 4.3 liter V8 engine
the year of the car is 81 and it's a 3 speed automatic

 

[Wm Norvas]

I would think it is a 4L60 E. That is if it is an Automatic. It is an overdrive 4 speed.

 

[Troy]

What year is the car?