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.
Gear ratios The gear ratios are:
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 -
Applications
Volvo PV544 Volvo Duett Volvo Valp Volvo Amazon Volvo P1800 Volvo 140 Series Volvo 164 Volvo 200 Series (1975 model year only)
References