This weekend I noticed an odor when backing up a small trailer. I'm not the most experienced so it took me a few cracks to get the trailer in the driveway. My first and more cynical guess is that I heated the tranny up from the multiple attempts. I've read about fluid "puking" before in these trannys but I am not sure. The trailer is so light so it makes me slightly confused as to why this would happen. My second and optimistic guess is maybe the wheels on the trailer had some bad bearings or need replaced and that what I was smelled. Any thoughts or similar experience would be so helpful.