7.5" and i think the gears are 3.33 or 3.23. I upgraded mine to 3.73 and bout to put 4.10's in them this weekend
2010 V6 Mustang Auto pony package
Go: BBK Shorty Headers, Dual Exhaust, 4.10 Gears w/ LSD, 93 Octane SCT Tuned, Bosch Plat 4 Spark Plugs, J&M Camber plates, 06 GT Shocks/Struts, BBK CAI, Eibach lowering springs
Show: Steeda Strut tower brace, 4.0 Billet fuel door, Blackout rear end
Future mods: SD Coil pack/wires, Drag Radials.