replaced radius arm bushing on passenger side. removed sway bar mount at frame, disconected shocks, removed and chagned coil springs. of course alo chaned driveer side coil spring. drives and rides fine, but no reverse at all? Any ideas?

 

Assuming an automatic transmission???

If there were no symptoms or problems with transmission before then I would say you unplugged a solenoid or broke it's wire.
Check all wiring on the transmission, unplug and plug back in any connectors