My sliding door has developed a decidedly loud "clunk" when it shuts.
Definitely not normal. I thought at first  it was a loose screw in the
sliding/locking mechanism - I did find one and tightened it - but that
was not the problem.

Envision the track down the side of the van that the roller travels on.
On the door there is a mechanism that has a roller towards the rear and
a roller bearing towards the front. These pieces are just a couple of
inches apart mounted on the same part. Whe the door is being closed,
just as the door shuts, the roller bearing hits the end of the upper
part of the track and makes a 90 degree change in direction. The roller
is triking the end of the track to make its turn, and when it does is is
making a loud clack!! Something is wrong It is hard metal slaming hard
metal. Right at that corner there is a slot. It appears as if there was
some sort of bumper there at one time but now it is gone.

Can anyone tell me what is supposed to be at that slot at the end of the
track?? Somehow what is going on is not normal operation.

Thanks,

John Rodgers
88 GL driver