Rear lowering question
 

Guys,
When lowering the rear with the adjustment bolts on the stock arm, is it neccesary to jack the car first, or can the retainer bolt be loosened and the adjustment bolt be turned to the desired setting with weight on wheels? My height is right around 25, I would like it to be around 24 7/8 or so. Hopefully I still have some adjustment left with the bolt, and won't have to reindex the t-bars.
Thanks
Eric

I do it with the car on jack stands to minimize the load on the adjusting bolt threads.

Miguel,
That's what I thought thanks!
Eric