Posts: 1906
Location: Oconto Falls, WI | With the 5.3L you are going to want to pull with the OD off. Why risk a little extra mileage at risk of needing a new tranny? Although like others mentioned if you are on a flat road then you could get away with pulling in OD. As soon as it starts shifting in and out of OD it is time to just turn it off and run it in 3rd gear.
If you are looking for a new truck I have heard nothing but high praise for the new Ford F150 ecoboost engine. I personally do not own one, but several of my in-laws do. They claim it pulls awesome, and the mileage doesn’t drop while pulling either.
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