Originally Posted by fredswain

I used the very scientific method of just randomly picking one. Much like springs I just needed a place to start. I chose 30W in the rear since it seemed to work well with that piston in the past. Then I chose the front weight based solely on the drop test as with the springs. I only wanted to find balance. In my case, on my car with my pistons and shock locations, it was 20W front/30W rear. I only use 1 brand of shock oil. I like Associated shock oils. They have lots of choices.

This was my starting point. Driving the car to see how it handles determines if the oil weight needs to be adjusted as well as piston sizes. As with springs, if I change one end I change the other to balance.

I am personally not a fan of the driveshaft "bind" theory. I'm not saying there isn't merit to it. I just prefer everything be as free moving as possible. To me a driveshaft should rotate the drive wheels and that's it. I'd rather fix handling and traction issues elsewhere.