Thanks.
In target in garage all shall be necessary to a detail will look. And that while I the motor shall change a lot of time will pass. For one me should result a gear box 5 step (m47??? ) in gathering with differential. It should replace my old 4 step. On idea too should approach all fastenings.

gearbox change is quite easy, you can keep the gear lever mechanism of the 4 speed

Simply at me on 4 передачена it is heavy to 120 machine to become already.
Therefore 5 step is necessary.