Discussion question , rear trailing arms

[Pdwight]

I have read where you should torque these down while the car is sitting on the ground. I just installed new ones on my 01S and it was lifted on jack stands while I did this..I do not understand why it would matter ?

I removed the bolts and pulled these out by hand, installation was the same requiring no real pressure anywhere, and there is no adjustment for these...so why would it matter ??

I am about to have a 4 wheel alignment so I did not really care about it getting slightly off, but I would like to understand.

PS a tip for anyone about to do this, a 3/8 extension is very handy to align or orient the ball joint before you insert the new part !