Today I was out flooring the car like always and when the transmission got ready to shift from 1st to 2nd I felt and heard a very loud "clunk" noise...after that whenever the car was floored, the gears shift with this clunking noise...also I noticed that differential fluid is leaking...did I blow my differential? When the car is driven normally there is no "clunking" noise when it shifts...if it is a blown differential do you guys know how much does it cost to fix it?

 

Get under the car and check out the tranny mount, see if it split.

 

If it's the transmission mount how hard would be to replace it? From the research I done it seems like it is a transmission mount...I haven't had a chance to check it under the car though...I'll do that tomorrow...what should I be looking for?