[Spadds76]

Ok so kinda been through the ringer with this. I installed RSR downs a couple months ago on my AWD q50.
I got the shake from 20-25 mph and 75 ish from the axles. I got the Z1 Axle kit at that didnt solve my problem at all.
And I brought it to the dealership and they said it was also the lowering springs.
So now i just dont know what to do and am thinking of switching to BC Racing Coilovers.
Just before I buy them i want to make sure I wont have this problem with them and if they are worth it.
(Before u say u should have just gotten them to begin with, price is a big factor so it was worth a shot)
Any information helps thanks

My AWD is on RSR down springs with DDS suspension. It's ok. No vibrations but I think my rear shocks are on their way out so I too am considering BC coils for daily driving. I want a very small drop so I don't need to buy adjustable control arms. RSR coils would be my first choice to retain the DDS functionality but I am too tight to spend that money on my 8 year old Q. If they were 1k less, then I would be more tempted.

For your current issue, I would refit the OEM springs to your car and see if the vibration goes away. It would be a PIA, but if you then get coils, you can start at full height, and progressively lower them over time until you get the vibration, and then back off and raise the car to the previous non-vibration height and all should be good? Either way good luck.