1997 Buick Riviera

A new upgraded 4-speed automatic transmission is included with the normally aspirated V-6 engine. A heavy duty version of this transmission is included with the optional supercharged V-6 engine.

What Changed:

A new upgraded 4-speed automatic transmission is included with the normally aspirated V-6 engine. A heavy duty version of this transmission is included with the optional supercharged V-6 engine.