This had stumped me so i hope someone can help. Ive got a 289 thats got a C4 humping its back.I took my stang out last night and was shifting weird so i pulled over and checked the fluid level.Its was 1 1/2 quarts low.soon as I got the last of the fluid in the thing started smoking horribly.It smoked like a frieght train all the way home(thank god it was only like 4 blocks).The only thing i can think of that would make that happen is tranny fluid coming up that vacum tube from tranny.Anyone got any info?Thanks for reading.