Did I break my gears?

My 95 Gt is lowered with an auto, stock rear end with a 3.73 gear. I installed the gears myself about 20k miles ago and have not had a problem. Today i was driving and i hit a massive bump in the road, and as soon as i did it, there is a clunking noise comming from the car. It is definitley part of the rotating driveline. It sounds like its comming from the rear/driveshaft. It does it in drive and reverse, and also when i turn the car off (try to pinpoint the sound), put it in neutral and slowly cost, it does it. Does it sound like my gears are broken. i installed them, and i have a small amount of experience, but im no expert, so it could be that the gears werent installed properly and that massive bump finished it off. Sorry its so long, but i was trying to be as specific as possible. so what do you guys think?

okay thanks thats what i was thinking....i just got two jackstands. a ujoint was also another thought, but im not very familiar with them. anyone else have any input?

oh yeah i did look under the car....but the driveshaft looked fine, but it was an akward angle...and that doesnt mean its broken, so im not sure, thats why i think its possible its the gears

thanks for the info.....im gonna climb under it tomorrow after class. I replaced the clutch packs and basically rebuilt the stock t-lok. there was no signs of wear, it just happened when i hit that bump. to be honest, i hope its the gears. good reason to upgrade to a 4.30