automatic overdrive

Isn't 2nd over the same as third?
Almost but not quite ; the ratio is 1.13 verses 1.00, tho, pretty tight .
But that translates to about 12mph at the big end, with 3.55s;
(5000/1.1for slip x 84.8tire)/(1056x3.55x1.00ratio)=102.8mph verses, 91 mph in 1.13 ratio. So that's something I guess.