Getting ready to do mods ????

[hayjayhorses]

Originally Posted by epowers777

Do I need to get friction modifier for my rear dually axle and my front axle they say dana on the caps

Only if you have a limited slip or locking differential in the rear. Very unlikely you have a locker in the front. To tell if have a limited slip, jack up your truck so both wheels are off the ground, put in neutral, and spin on wheel if the other wheel spins the same way, you have a limited slip differential, add friction modifier

If the wheel spins the opposite direction, you have an open differential, no friction modifier needed.