I have a 1992 Thunderbird LX with a 5.0, it's an automatic... I paid $700 for the car, so it's not like I wasn't expecting problems, when im going about 60 mph with the car in fourth gear, it WILL NOT catch, I can rev the beast to my hearts desire an the car just wont catch. This does not happen in any other gear, just in fourth (im fairly sure that its a four speed automatic transmission, if im wrong please dont be cruel about it, ive only owned the car for two weeks and im fixing things as I go. Anyways, my diagnosis is the valve bodies on the transmission are dirty, are there any other possibilities? Also, ive seen pictures of thunderbirds with hoods that have a slight scoop built into them, are these stock on the super coupes or are they aftermarket... and if so, where do i find them?