The MF135 was most commonly fitted with a 45hp 2.5L Perkins AD3.152 3-cylinder diesel engine. Alternatives included the Perkins AG3.152 petrol variant, or a 37hp 4-cylinder Continental petrol engine in the US.It was 2 wheel drive and the gearbox had 6 forward and 2 reverse gears, (3+1, high / low range) with a mechanical clutch. Later versions (1970 onwards) came with an 8 speed transmission (4 forward & 1 reverse across two ranges, high and low). There was a multi-power option giving 12 forward and 4 reverse gears, plus a hydraulic clutch.