Re: Chevrolet 8.1 Vortec advice
Most trips are less than 250 miles, mainly in the Carolinas. Mixture of two lane roads at 50 to 55 miles per hour and highway/interstate 60 to 70 pending on traffic. At speeds of 50 to 65 it shifts a good bit but at 65 and quicker it smooths out. Before the tune any kind of grade change it would drop back to 4th, its not as bad now will drop to 5th and pull on.
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