Don't know if this is new or old news but I took the 08 out to the road course today for an event that was hosted by the local MCA chapter. Anyway, we noticed a major problem occurring with about 90% of teh new Mustangs. Seems like when under heavy driving conditions, the rear diff blows fluid out the vent drain. It seemed to be more noticeable in Shelby and Roush Mustangs and if you had your traction control button on. Just wanting to pass this info on and also see if you guys that use your Mustangs for road course or autocross (or even drag maybe) have seem this same problem.