Possible buggered gearbox?

[ins0mn1ac]

Just lately I had to replace the nearside driveshaft due to both joints split and it was probably healthier to just whack a whole new one in rather than put new joints on the old one. Had a friend mechanic put it all in and it was fine for about a day..

Driving back from docs Monday morning I could hear a kind of grinding turning right, so before I had time to get the car somewhere safe off the road, I heard a clunk and lost all drive. The guy that did the driveshaft for me said he was convinced it had sheared and it'd be fine but after an AA man recovered my car back to the garage he said the shaft was 100% fine and was still perfectly sat in the correct place. Few hours later my friend phones and says he cant get the driveshaft back out to check it and will need to open the gear box and see

So something simple has snowballed :/ can anyone add any thoughts to what might be wrong? what am I looking at? my friends garage is in Bristol and he can only work on it after hours so updates are slim

Cars a 54plate Corsa.

 

[ins0mn1ac]

His words to me were that he managed to angle the car so not much oil was lost when he took the driveshaft out, didn't need to put much back in just topped it up.

My personal totally unqualified thoughts were always it must have had no oil and just grinded itself up.

 

[ins0mn1ac]

Been told now the gearbox is shagged and it's being replaced, not a penny coming from my pockets but I'm still miffed.

I've done loads of youtubing on DIYing this now and I'm pretty confident I could easily do it myself so from what I know now, I'd say there was no oil in it and he actually forgot to do it or the drive-shaft wasn't fully in the gearbox, but then surely when you drop the disc back on the end of the shaft and tighten the hub nut it'd push the shaft in fully anyway?

All I can do is speculate, he's fixing this mess for me regardless, I'm just shocked how easy it looks to DIY and wish I had a crack myself