In addition to changing the oil (man, 7 quarts takes a LONG time to drain!) I decided to install the UUC Tranny Mount Enforcers that arrived in the mail today. Here are some installation notes and driving impressions.
Installation: Very straightforward. Unless you're a stick figure, Rhino Ramps are going to be way too low to do this comfortably. Stick with jackstands. The directions are easy to follow, but I got held up with the upper nut on one of the bushings - it was slightly rusted and took a LOT of effort to break loose. I ended up using a long screwdriver for leverage against the combo wrench. BTW, on my '99 M3, all of the nuts down there were 13mm. You'll need a ratchet with a moderate (3" or so) extension and a combination wrench to do this easily. On one side, the heat shield from the exhaust covered the crossmember bolts. The shield is very soft and can easily be bent out of the way; just remember to bend it back when you're done. Once I took care of that #@$!! cross brace, total installation time was maybe half an hour.
Driving Impressions: Wow, what a difference! I instantly felt more confident with all of my shifts. The lever just slides right into gear now, no more guesswork or rubbery feel. There is no vibration at all inside the car, but there is a little more noise. I can hear the transmission more clearly now. However, I didn't notice anything until I turned off the radio and climate control. A few WOT runs (while looking around nervously for cops in the middle of the night) really made the TMEs shine - upshifts happened quickly and surely. I can see how this product would help to prevent accidental overrevs, but I don't consider that to be the primary benefit of this mod. This should work very well with my short shift kit, whenever I decide to install it.
Overall, it was money well spent. It really does live up to UUC's claims and I can't wait to really wring it out in the next few days and at an autocross.