Placing a car on jacks - warning

[David Massey <105671.471@compuserve.com>]

Message text written by John Cowan
> 
   Jacking up the back of my '66 TR-4A with the jack placed under the
differential provoked a slow leak from the diff cover.
   John Cowan
<

I have seen people jack up the front end of the car from the oil pan on the
engine.  Still gives me shivers.

Dave