M40 and M41 are both gearboxes produced by Koping Engineering for Volvo and used in Volvo Duett, Volvo Valp, Volvo Amazon, Volvo 142 and many more. It is a four speed gearbox. It was also available in a stronger version called M400 and a three speed version called M30.[1]
| Gear | M40 | M41 |
|---|---|---|
| 1st | 3.13 | 3.13 |
| 2nd | 1.99 | 1.99 |
| 3rd | 1.359 | 1.359 |
| 4th | 1.00 | 1.00 |
| Overdrive | - | 0.77 |
| Reverse | 3.25 |