12mm 12 pt will work great not enough leverage though get another wrench for torque. jack the ass end up slide under there leave the car in gear and start bustin them loose, slide the old one out if the ass end is high enough you wont leak but about a handfull of fluid thats in the end of the shaft. When i put mine in i use lock tight (not the red its permanent) I use blue i think, this is an easy twenty min job good luck