Well, I tackled my 2009 DTS 99,000k tranny yesterday with success
. I dropped the pan, and the oil was brownish red, clean looking, no metal shavings, removed the bolt from the side pan and let that drain also, the magnet was very descent, it had a little metal dust but not bad, the 2 screens were not really dirty. I cleaned up the pan, magnet, and screens, installed the 11mm bolt back in the side tank, installed a new gasket, snug tightened the 16, 10mm bolts, (they seem to snug at a certain torque on their own where you know not to go much tighter)
I added 8 quarts. Let the car warm up, went through all gears and checked for leaks and checked the fluid level. It was low. I added 3 more quarts which brought it to the "hot" range on the dipstick (about the middle of the "hot" range)
8qts + 3qts = 11qts so the rest was in the converter, right?
I drove it about an hour. Upon shifting into drive it was even smother than before. Brought it up to about 85 mph for a lil while. Downshifts and upshifts well.
This was the first time I ever serviced a transmission's fluid and filter/screens. It feels good to know what you want done, is done, without wondering did the mechanic do it?, or did he just say he did it?
Thanks goes out to the members of Cadillac Forums for their guidance and comments