yup,the bags are the springs!it's like riding on air!
it is acually alot bouncier with them than i thought they be

.no shocks yet of course!
basically the same as a trac bar?it has a trac bar,if thats what you mean?
a torque tube suspension has a tube that can swivel hooked to the end of the transfer case,and the other end is rigidly mounted to the third member.the drive shaft runs inside this tube,and is well protected.it controls all for and aft movement,as well as axle wrap.the trac bar controlls the latteral movement.
old cars from the 1910's and 20's used this system also.it works very well,and there is really no math to figure out,so that is why i went with the one link,which is basically identicle,other that the shaft is not inside the main tube,and i have a x-member that the main link hooks to rather than to the back of the t-case...
i think mid 80'sto 90's camaro's used a very similar system on there rear ends.
hope this explains it a little better
