FORD 2014 Mustang v.2 - Manual (Page 167)

For the 3.7L V6 with 2.73 axle ratio, shift according to the following
chart:
Upshifts when accelerating (recommended for best fuel
economy)
Shift from:
1 - 2 15 mph (24 km/h)
2 - 3 25 mph (40 km/h)
3 - 4 40 mph (64 km/h)
4 - 5 45 mph (72 km/h)
5 - 6 50 mph (80 km/h)
For the 3.7L V6 with 3.31 axle ratio, shift according to the following
chart:
Upshifts when accelerating (recommended for best fuel
economy)
Shift from:
1 - 2 13 mph (21 km/h)
2 - 3 26 mph (42 km/h)
3 - 4 37 mph (59 km/h)
4 - 5 43 mph (69 km/h)
5 - 6 59 mph (95 km/h)
For the 5.0L V8, shift according to the following chart:
Upshifts when accelerating (recommended for best fuel
economy)
Shift from:
1 - 2 12 mph (27 km/h)
2 - 3 24 mph (40 km/h)
3 - 4 31 mph (64 km/h)
4 - 5 39 mph (72 km/h)
5 - 6 43 mph (80 km/h)
166 Transmission
2014 05+ Mustang (197)
Owners Guide gf, 2nd Printing, May 2013
USA (fus)