Quattro seems to not be working

[ABS2788]

I tested my car on a ramp to see if all 4 wheels spun but only front 2 and back wheels only spun very slightly. Going to get haldex service today hopefully but any thing else that i can look out for

 

[Marshy]

I doubt it'd work on a ramp.
It would think both front wheels were turning correctly so wouldn't activate the rear.
It needs to sense wheelspin to activate the rear.
If you get it plugged in with vcds it'll tell you if the haldex pump has failed because if it has it's pointless servicing it if the pump needs changed.

 

[Darren92]

As above really.