Tavi
Vehicle enthusiasts
I just recently discovered my dually was upgraded to 4.56s at some point in its life.
On 30 inch tires, the RPMs are a. It high at 80 (3,000). But I don't think there was much of a hit in the mileage. It gets 10 mpg unloaded, loaded, city or highway. 454 TBI. But it has much more pep than any other 454 TBI I have driven.
On 30 inch tires, the RPMs are a. It high at 80 (3,000). But I don't think there was much of a hit in the mileage. It gets 10 mpg unloaded, loaded, city or highway. 454 TBI. But it has much more pep than any other 454 TBI I have driven.