Possible trans rebuild, After loud pop Options

[R Dub]

The wife and I were driving home today after lunch and was making a left turn when heard a loud pop and instantly no drive. Had power but it would not move. After jacking the car up, noticed the axle on the driver side came off, the bolts backed out. They didn't snap or strip, just backed out. I Uber home to get my truck and tools and was able tighten the bolts back up. However after pulling away, went to shift to 2nd and it grinded hard, shifted into 3rd OK, when to 4th and nothing, then tried 5th and nothing. So seems all I have is 1st, 3rd and Reverse.

Already PM Dr. Evil about a rebuild and possible and cost. Just a crap way to finish a good day. Just glad to get it home

On a positive note a guy stopped to see if we were OK and said he used to have a 914 that he loved (up until he crashed it)

[R Dub]

Worked on the car a bit today and hoping the experts out there can chime in as I have no idea what I am looking for/at.

I think I have 2 problems

1) While tightening up the CV joint to the trans, I noticed a big chuck missing. I think the pin hit it when it came off. I am assuming grease will just fling out of this?? If this does need to be replaced, do I need a new new cv joint or is it just a simple spacer or something?

(IMG:http://www.914world.com/bbs2/uploads_offsite/i.ibb.co-21387-1599337978.1.jpg)

2) The shift rod that runs under the car/into the trans seemed to have a lot of play in it. I removed the rectangle cover on the trans and a bunch of plastic shards came out. So clearly something exploded, likely a bushing.

Is there supposed to be a bushing where the rod goes into the trans? (Refer to where my finger is pointing in the below pic)
(IMG:http://www.914world.com/bbs2/uploads_offsite/i.ibb.co-21387-1599337979.2.jpg)
(IMG:http://www.914world.com/bbs2/uploads_offsite/i.ibb.co-21387-1599337979.3.jpg)
(IMG:http://www.914world.com/bbs2/uploads_offsite/i.ibb.co-21387-1599337980.4.jpg)