..nowt wrong with a bit o'transmission slap.. good ol' Landies, don't you love 'em to bits?
My 110 (less than 30,000 miles old) is currently waiting for two new rear halfshafts and two drive flanges.............2 week back order for spare parts for a current vehicle! Fantastic! If your Defender is under three years old pull off the rear flange "hub cap" and see if they are corroded. If they are, off to your dealer you go...