I regularly remove wheels with mine, have used it on undercarriage work, in the mud, snow and rain (we get lots of rain). Sent the 1/2 impact in for warranty after dropping numerous times, the last time I dropped it on its nose and the anvil stopped spinning. The 3/8 impact and ratchet I just sent out recently, the impact had some electrical issues, but it has been subject to moisture all its life, submerged in oil and gets used quite a bit more than the 1/2 I find.
The M12 3/8 ratchet (non-Fuel, original) I find a bit disappointing. At first I couldn't put it down, used it for everything. After a while the switch on the head gets shitty, it seems to "slip" often (the little hammer moves but the head can be held still by grasping the socket). I wanna try the new 3/8 Fuel version, usually the Fuel stuff is more professional grade compared to the regular M18 line.