International Harvester 4.8L 6-cyl gasolineGasoline · 6 cyl
291 ci
International Harvester 5.9L 6-cyl dieselDiesel · 6 cyl
360 ci
Engine details
International Harvester 4.8L 6-cyl gasoline
Bore × stroke
3.75 in × 4.39 in
Rated speed
2,400 rpm
Cooling
liquid-cooled
International Harvester 5.9L 6-cyl diesel
Bore × stroke
3.88 in × 5.06 in
Rated speed
2,400 rpm
Compression
17:1
Cooling
liquid-cooled
Transmissions
Transmissions for the Farmall 766
8-speed geargear
8F / 4R
Torque Amplifiertwo-speed power shift
16F / 8R
Transmission notes
8-speed gear: Four gears (1-4) in low and high ranges.
Torque Amplifier: Four gears (1-4) in two ranges (low/high) with the Torque Amplifer (TA) power shift. The TA allows a shift-on-the-move between direct drive and a lower speed.