1) The most obvious way is to look at the transmission pan. The shape and size of the pan can vary depending on the type of transmission. For example, the 4L60E transmission has a square-shaped pan, while the 4L80E transmission has a rectangular-shaped pan.
2) Another way to tell the difference between Chevy automatic transmissions is to look at the number of shift solenoids. The 4L60E transmission has three shift solenoids, while the 4L80E transmission has four shift solenoids.
3) Finally, you can also tell the difference between Chevy automatic transmissions by looking at the transmission fluid color and clarity. The 4L60E transmission uses Dexron III fluid, which is a bright red color. The 4L80E transmission uses Dexron VI fluid, which is a dark red color.
If you are still unsure of what type of transmission your Chevy has, you can always consult with a qualified mechanic.
