Rear torsion bar....

[Triathlete]

If one of your links snaped hopefully you did not try to drive it! If you did you could have some major problems.
If what Joe_Black described isn't what you were refering to then it would be the sway bar. It also commects to both sides of the axle but it goes from side to side not fore and aft.

[SPAZZ]

I have 3 of the rear drag link bars that attach to the axle and hold the rear wheel in place from moving back and forth and only allow it to move up and down. If it is one of these, pm me with offer+you pay shipping.
This is the same bar Joe Black posted pics of. If you didn't snap one of these and snapped your sway bar, next time you go wheeling after you get the sway bar replaced disconnect only one link from only one side side of the sway bars. You will get more articulation and save your(sway bars) handling for the street.

[raver_boi_88]

nope definitly no the trailing link, it connects to both sides of the axle and is atached to the underneath of the chasis, I think it might be a sway bar.. it is atatched to the axle in the front of it...I will post pics when i get my camera so you guys will know what I am talkin about... but if it is the sway bar how easy is it to replace and is it bad to drive with it broken cuz i have school and work tomorrow??

[Triathlete]

Shouldn't be to hard to replace. The only thing the sway bar will harm is the handling. The vehicle will display more body roll when you corner...just slow a bit more than usual when taking corners/turning. It is a common practice for people to disconect one side of the sway bar as Spazz said when 4 wheeling to help increase the articulation.