my car is a 2004 V70 D5 and makes a thump when shifting gear unless i'm super smooth with gear changes, can also be noticed if you are on and off the throttle and it's driving me mad.
i've tried everything that i can think of all engine mounts have been replaced ,both hydro mounts ,gear box stabilizer mount, mount under crank pulley and also top engine steady mount , checked drive shaft bolts ,checked subframe bolts and wish bones and everything seems to be ok.
when i bought the car i replaced the clutch and flywheel with new luk kit, so don't think its clutch or flywheel related.
i've no idea what to try now ,is it possible that it's a gearbox or driveshaft problem.
it does feel like a engine mount problem as it feels as if the engine shunts forward and back when on and off the throttle but after changing all the mounts it's not made the slightest bit of difference.