M40 and M41 are both four-speed gearboxes produced by Koping Engineering for Volvo. It was also available in a stronger version called the M400 and a three-speed version called the M30. [1]
The gear ratios are: [2] [ verification needed ] [3]
| 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 | - | 
|  |