F30 318d gearbox issues

[Jaybmw]

Hi lads. I have a 2014 318d and it appears it has a box issue.. no reverse or 2nd gear. Not going to repair it just going to swap it out. I have a stop start box from an e90 320d. Bar ratios maybe been off are they roughly the same box, same n47 engine basically both 6 speed etc ? Thanks