I have an 89 GL and just replaced the catalytic converter and oxygen sensor.
Everything sounded fine upon start up so I decided to go for a test
drive.  However, the van would not move.  It felt as if something was
locking up one of the rear wheels.  The e-brake also felt very tight
even when released.  I mean, I could only get one or two "clicks" when
trying to engage the e-brake and it was much stiffer than normal.  I
jacked up the rear end to see if the wheels would spin freely and with
the brake off in neutral the passenger side rear wheel would not spin.
 It would move only about 1/2 inch and then it sounded as if something
metal was blocking it.
With the tight parking brake I assumed something was wrong there, but
in being a beginner at fixing the van I also naively assumed something
i did in replacing the cat messed up the wheel.
Also, the van drove fine 2 days before this happened - without the cat
or muffler connected as i just had to move the van across the street.

Any help, comment or ideas would be greatly appreciated.
Thanks.

Chris
89 GL