If I have read that right, you already have a freelander so all the usual freelandery bits - viscous coupling (look for scrubbing on the rear tyres), knocking on tight corners, knocking under heavy braking/heavy acceleration, check all buttons/electrics/rearwindow works, whining from the IRD, clunking from the diff.
Other than that I dunno, ours is too old and it's a V6 not a TD4