Do ALL TD's leak oil?

[Roger Wilt <RDWILT@pol.net>]

I've got a 1950/51 (we're not sure-there are two titles) TD.
The engine was recently rebuilt "professionally" by a well respected
former Jaguar mechanic.  Everytime I stop, I leave a 3 inch puddle of
oil. His explanation is that all TD's leak from the rear oil main and
there is nothing he can do. This rebuild cost me over $4000!! Do I have
grounds to complain???? HELP!!!!!