1992 Buick Park Avenue, Base.

For awhile now I've had trouble shifting into park from other gears. Sometimes, it'll flow right into park without trouble. Other times, I have to work it, to kind of baby it in. However, it simply will not shift into park from reverse. Period. If I'm in reverse and want to park, I have to go into drive, neutral, etc, and then try to move it into park.

A mechanic I know looked at the neutral saftey switch and thought it could be causing the problem. We figured it wasn't in the steering column or the cable to the switch because if we disconnect the cable, you can slide that lever all day long. So I purchased a new neutral saftey switch and had him install it, but the same problem is there. Actually, let me clarify: while it was in his garage, with the old switch, it would no longer go into park at all, regardless (kind of decided to just stop altogether). At least with the new switch we can baby it into park, but it is basically back to where it was last week. He mentioned it might be deeper in the transmission, but that's out of his league.

So, ideas? Suggestions? .....price range? Heh, thanks.