• WhichTractor size: Standard-size
  • No lab test on file
  • 1971–1976
  • 54,947 built

It sits on the standard-size/high-power boundary, so either size is a fair description. WhichTractor size, not the maker’s category

International Harvester Farmall 1066 Transmission specs

9 transmission values on record for the Farmall 1066.

Engine power, claimed · gross or net not stated

115.5 hp

86.1 kW as stated by the source

No lab test on file

Claimed · standard not stated by the source

Source · Traktorenlexikon, “IHC 1066”, 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 Farmall 1066 go?

The fastest speed on record for a Farmall 1066 is 18.6 mph (30 km/h). The gearbox itself is not on record yet.

Transmission — Farmall 1066 Transmission
Drive2WDSource 1
Forward gears8–16the article lists alternatives
Reverse gears4–8Source 1the article lists alternatives
Transmission as described8 forward/4 reverse, 16 forward/8 reverse and steplessSource 1
Stepless transmissionCVT
Top speed forward18.6 mph · 30 km/h
Top speed reverse11.0 mph · 17.70 km/hhighest reverse speed printed in the article's speed tables
Differential lockHydraulically operated differential lockSource 1
Front axlePendulating, extendable front axle

Source · Traktorenlexikon, “IHC 1066”

Sources and how this page was built

9 transmission values from Traktorenlexikon, “Farmall Farmall 1066”; and Traktorenlexikon, “IHC 1066”.

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 1066 — CC BY-SA 4.0, WIKIBOOKS-TL-118877 · revision 1054932. Wikibooks contributors (Traktorenlexikon). Original document
  2. Traktorenlexikon: IHC 1066 — CC BY-SA 4.0, WIKIBOOKS-TL-118876 · revision 1055406. Wikibooks contributors (Traktorenlexikon). Original document