G gmcsierra New member Joined May 8, 2014 Messages 21 Reaction score 0 Jun 22, 2014 #1 When slowing down on the highway, can I use the 321 gears manually instead of the brakes? It is a 4 speed 4L60E automatic transmission.
When slowing down on the highway, can I use the 321 gears manually instead of the brakes? It is a 4 speed 4L60E automatic transmission.