> Question:
>
> 1.Why does my car's rear end suspension jump up when put into Reverse,
> back down in N, and then drop even lower when put into D.
>
This is caused by suspension "wrap-up" as induced by torque in the
stationary drivetrain. It's the same thing that hotrodders are trying to
combat with the big ladder/torsion bars (not wheelie bars) that they put
in. Envision that the ring gear, which is attached essentially to the
stationary ground via the axles and tires is sitting there. When you
engage a gear, the pinion gear gets "twisted" by the now torqued
propshaft, tranny and engine. That pinion gear tries to crawl around the
stationary ring gear. It can climb or dig in depending on the gear you go
into and that energy is transferred to the suspension thus affecting the
rear end height. Hope that's clear...