I have lifted the front wheels off the ground as suggested and it appears I have a problem within as I cannot turn either wheel by hand while in neutral. Also in either forward or reverse there appears to be resistance but its far worse in reverse. I have slacked off the parking brake adjustment but to no avail. I am awaiting a guy with the heavy tools needed to remove the wheels and check out within. At least I know now where the problem is as I had worries it might have been the transmission. thanks guys for your help. I will let you know the outcome.