!!! new best but broke the rearend!!!!

i'd say you broke the ring and pinion gears. you said 4.5 passes, so you where out of first gear when the rear broke. if so the sprag is not in play after your out of first and will be fine. i think the others are correct in that a higher gear will help you get to the 10.50's. the 440's seem to like between 4.10 and 4.56 gears for some reason.

hi bob i only made it about 40 feet when the rear let go. it shook the car so hard that it poped the horn button off my stearing wheel and nocked open my ash tray lol. my car does have a bolt in sprag. but i am going to pull the trans and see what all if any it broke. I still can beleave it did not brake my rear little conversion joint. my drive shaft has a 7290 joint but my rear is only a 7260. but i will take car of that when i set up the new gears. I have a brand new set of 4.10 gears and a used but like new set of 4.56 gears.but i am really trying to not make this a race only car again. i only went to the track one time this year.