It's around 300 here man. I'm in Frederick Md. Not too far away from you. Your cars new,so your rear should be in good shape. If you get FRPP gears they should bolt right in. Frpp gears are the same thickness and all as factory gears,so they bolt right on using the same shims and all thats already there.They do still say it should be checked,but I know the guy that does mine,my bro's and my dads,has done tons of em(he estimated 50 sets of FRPP). He said he dont even check anymore with ford gears.