I had similar issue with 2004 V70 AWD when I could not drive up icy driveway. I put it on my lift and found that only front wheels spun when in drive. I did the diagnostics from the Xemodex.com website and found the pump to be functioning but the electronic control was faulty. I removed the electronic control (simple process) and sent it to Xemodex. They cloned the network address into a new one and returned it (fast turn-around-time). Installed the new control, changed the fluid & filter (difficult but not impossible) and all 4 wheels spin while on the lift. I did this last summer so had to wait for winter to really try it out and it has worked great. We've had lots of ice, slush, snow this year to test it. This is the second Xemodex product I've used and have been very satisfied.
Marlin
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