slip - thud when accelerating subaru outback

[R Ducharme]

I have a 2002 Subaru Outback H3.0 with VDC automatic

When I start to accelerate, sometimes it feels like the rear is slipping and
then a couple of thuds. Somewhat like if I had a manual transmission and
allow the clutch to slip then released the clutch quickly. Any ideas?

Robert

 

[grape]

I think it's the rear multi-plate clutch that engages during acceleration.
just a guess since for auto tranny, the awd system adoptes the *clutch*
thing.
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[R Ducharme]

The final answer is:
The drive shaft had one of the U-joints frozen in one direction. Once
that was replaced, all is well.

Robert