With just over 100,000 miles on my truck I started to get the "ususal" notchy shifting from 1st to 2nd and thought I'd try changing the fluid to see if it made a difference. Well, I think I made a mistake going with a synthetic fluid. I used Mobil 1 and have noticed that the truck is now seeping fluid from the section between the transmission and where it joins the extension to the transfer case around what appears to be sealed with FIPG. Is this a common issue with changing between dino and synthetic? Was this something I should have known better than to have done had I done my research? Given the higher mileage? And last, any idea on what it will run me to have it fixed? Thanks in advance.