I'm pretty sure the s70 is the same as the 850 so yes the IPD kit will work but you can also just use about 4 ft of 1/2" ID clear vinyl tubing from Home Depot for a $1.00 and an empty milk jug marked in qts to receive the old fluid. You probably should have a spare tranny hose clip (I never do) in case you break the old one but if you're careful that shouldn't be a problem. Snap ring pliers work well for opening the clip w/o breaking it but you can use needle nose in a pinch. Very easy procedure that you can do in < 30 mins w/o jacking the car or getting dirty. No need to change your filter as it doesn't have one.

bl