WhichTractor
  • WhichTractor size: High-power
  • No lab test on file
  • 1974–1976
  • 7,417 built

WhichTractor size, not the maker’s category

International Harvester 1566 Transmission specs

10 transmission values on record for the 1566.

Engine power, claimed · gross or net not stated

161 hp

120 kW as stated by the source

No lab test on file

Claimed · standard not stated by the source

Source · Traktorenlexikon, “Farmall Farmall 1566”, claimed

This is the maker’s own figure, measured at the engine. Power at the PTO is lower — by how much, for this machine, nobody has measured.

How fast will a 1566 go?

The fastest speed on record for a 1566 is 18.6 mph (30 km/h). The gearbox itself is not on record yet.

Transmission — 1566 Transmission
DriveAvailable in two-wheel and four-wheel driveSource 2On record for 0 of 2 configurations
Forward gears6–12the article lists alternatives
Reverse gears3–6the article lists alternatives
Transmission as described6 forward/3 reverse and 12 forward/6 reverse
ClutchPedal-operated ceramic clutchSource 2Sources disagreepedal-operated ceramic clutch (Traktorenlexikon, “Farmall Farmall 1566”)
Top speed forward18.6 mph · 30 km/h
Top speed reverse9.8 mph · 15.77 km/hhighest reverse speed printed in the article's speed tables
Service brakeshydraulically operated disc brakes acting on differential side shafts
Differential lockHydraulically operated differential lockSource 2Sources disagreehydraulically operated differential lock (Traktorenlexikon, “Farmall Farmall 1566”)
Front axleoscillating, extendable front axleSources disagreePendulating and extensible front axle (Traktorenlexikon, “IHC 1566”)

Source · Traktorenlexikon, “Farmall Farmall 1566”

Sources and how this page was built

10 transmission values from Traktorenlexikon, “IHC 1566”; and Traktorenlexikon, “Farmall Farmall 1566”.

Sources checked

14 SEP 2026

Spotted an error?

Sources

Facts taken from these documents, units converted. Numbers beside a figure refer to this list. Licences and attribution

  1. Traktorenlexikon: Farmall Farmall 1566 — CC BY-SA 4.0, WIKIBOOKS-TL-118931 · revision 1035372. Wikibooks contributors (Traktorenlexikon). Original document
  2. Traktorenlexikon: IHC 1566 — CC BY-SA 4.0, WIKIBOOKS-TL-118930 · revision 1055414. Wikibooks contributors (Traktorenlexikon). Original document