hi, im new here. i have smelled a sweet smell when working my 4115 really hard for extended periods of time. it is coming from the rear diff area, and it smells more like hot hydraulic oil than rubber. i have narrowed it down to the hydraulic system getting hot and the smell coming from a breather tube under the seat somewhere. since i cant find any leaks, and the level hasnt changed, i'm gonna run it. if its major, well, thats what the warranty is for! /forums/images/graemlins/grin.gif