Hello guys, I have a 95 Mazda 323 Lantis (Protege) and my problem is this. my car wont go in reverse and it keeps jumping out of 5th gear, so far I've had the box rebuilt twice, changed the linkage grommets and box bearings.
it started to work the last time we rebuilt it and on the drive home it started up again.

What do you guys think could be wrong and how would I go about fixing it?

 

Who rebuilt the box?

 

a guy here named Ricky