Dunno if this is the right forum, but it's simple parts for a good fix! My shift linkage was really sloppy, so I got to looking at it at the column under the hood after an engine swap...saw that it could be shimmed up a bit. Since I work at a Peterbilt dealership, I found just the thing when I was pulling parts for a customer awhile back! They are the nylon bumper bolt washers, part# D8400-5636, for about 50 cents apiece. I just put one on each side of the little arms, snugged the nuts back up and liberally squirted with some white lithium grease. Now, almost all the "slop" is gone & I have better shifts with no grinding gears!
Hope this helps someone!