Guest Steve Stastny Posted March 4, 2002 Share Posted March 4, 2002 If I change from a standard transmission to a Fordomatic automatic would there be a problem not changing the differential? I believe one is 3.90 to 1 verus 3.31 to 1 for automatic. Or is there just a difference in how it will shift? Or gas milage? Link to comment Share on other sites More sharing options...
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