1)reverse gear does not work every other gear works ..what can be wrong???
2) its a gsr tranny with a mated to a stock b16a ?? how much would this affect the car.
3)can i use any of the internals from a cable tranny ys1 to rebuild the y80?

 

there isnt much to reverse beside a rod and its own seperate gear.. not hard to change if u open the case.. and id imagine a similar cable or hydro trans gear would work.