I have not seen a side by side test of otherwise equal trucks, so am left to WAG it based on anecdotes. I'd wager it's probably a good 2 empty, and a smaller gap when pulling.Does anybody know what the MPG difference is between the SO & HO? We talking .5mpg difference or more like 2 or 3mpg.
On Edit: I'll add that I think the Aisin plays into this. While they are very durable, I think there is quite a bit of power loss through it, especially around town when it is running through the gears.
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