International Harvester W-6 Transmission specs

The fastest speed on record for a W-6 is 14.3 mph (23 km/h). The gearbox itself is not on record yet.

8 transmission values on record for the W-6.

Engine power, claimed · gross or net not stated

36.5 hp

27.2 kW as stated by the source

No lab test on file

Claimed · standard not stated by the source

Source · Traktorenlexikon, “McCormick W-6”, 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 W-6 go?

The fastest speed on record for a W-6 is 14.3 mph (23 km/h). The gearbox itself is not on record yet.

Transmission — W-6 Transmission
Drive	2WD
Forward gears	5
Reverse gears	1
Transmission as described	5 forward/1 reverse
Clutch	Pedal operated dry Rockford single plate clutch type 11 inch
Top speed forward	14.3 mph · 23 km/h
Top speed reverse	2.9 mph · 4.63 km/hhighest reverse speed printed in the article's speed tables
Steering	Mechanical gear steering

Source · Traktorenlexikon, “McCormick W-6”

8 transmission values from Traktorenlexikon, “McCormick W-6”.

Sources checked

14 SEP 2026

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

Traktorenlexikon: McCormick W-6 — CC BY-SA 4.0, WIKIBOOKS-TL-117794 · revision 1019395. Wikibooks contributors (Traktorenlexikon). Original document