Ok so i have a 97 bird where i recently done a 4.6 swap and fixed all little issues here and there the car was running great until yesterday, i stopped at a red light and the car started to shudder when going from a stand still it did it again at the next light so i pulled over checked all my fluid levels and started the car again but now my car wont move at all... Ill put it in drive , 1st and 2nd manually and all i can hear is a slight whistle .. Put it in reverse and it moves no problem. Ive tried letting it hit up to 4000 rpm for a few seconds but car will not move at all. Im thinking a blown transmission but i didnt think it would happen instantly like that .. Also my o/d light is NOT on some people say look for a blinking od light but i can turn it on and off freely. Another guess would be my foward clutch plate due to the shuddering but either way i guessing a tranny drop? The transmission never had any issues prior to this just started everything lastnight..