It's actually best to leave it in D3 unless you're on the highway. Yes, overdrive might save you a few drops of gas, but it wears down the OD band in the transmission and, since that band is any automatic transmission's weak link, that's not good.
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1984 1/2 Mustang GT350 #842, Faster than you...nuff said
Anna Fan Club President/Dictator
Someday, in the event that mankind actually figures out what it is that this world actually revoles around, thousands of people are going to be shocked and perplexed that it was not them. Sometimes this includes me.
"If you want a vision of the future, imagine a boot stamping on a human face - forever." - George Orwell
Welcome to the new Amerika
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