hard steering this morning

[<lstein6@earthlink.net>]

this morning when i took a right turn the steering wheel did not come back as
normal.  then i noted that it was hard to turn the steering wheel and when i
did, the wheel stayed in that position (that i turned it to).  this made me
very nervous.  but after just two blocks it went away and it was normal again.
when making a turn, if you let the wheel go, it returns to center by itself.
the car is an 80 tr7 and does not have power steering.  any thoughts?  thanks,
larry