This week’s question comes from Cody, who drives a 1966 Chevrolet Impala Station Wagon. Cody is curious about the differences between the three rear springs listed for his model.
It’s likely that Cody’s wagon is a 2-seater, as this model typically uses three different types of springs, whereas the 3-seater version only uses two.
Cody asks, “What is the difference between standard duty, heavy duty, and extra heavy duty springs?“
This is a common question among vehicle owners. Contrary to popular belief, neither heavy duty nor extra heavy duty springs raise the vehicle higher than standard duty springs. The main difference lies in their strength—both heavy duty and extra heavy duty springs are designed to be stronger, allowing the vehicle to carry more weight.
For drivers who aren’t routinely carrying heavy loads, standard duty springs should work just fine.
Although Cody’s question is specifically about coil springs, it’s worth noting that the same idea applies to leaf springs.
