I have noticed a small leak (not consistent) underneath the car on and off over the past couple of weeks. At first I thought it was a rear main seal because I could see a small drip form at the bellhousing. This weekend I noticed the drip had returned after a short hiatus. It looks to be brake fluid, light amber colored, not the same viscosity of engine oil. I checked the master cylinder and brake booster but they seem fine. The idle is a little off and I was going to change the brake booster check valve and hose and since this leak looks brake fluid like I was going to change the brake fluid resevoir grommets. Anything else?