International Harvester 6388 Transmission specs

The fastest speed on record for a 6388 is 18.6 mph (30 km/h). The gearbox itself is not on record yet.

9 transmission values on record for the 6388.

Engine power, claimed · gross or net not stated

130.2 hp

97.1 kW as stated by the source

No lab test on file

Claimed · standard not stated by the source

Source · Traktorenlexikon, “IHC 6388”, 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 6388 go?

The fastest speed on record for a 6388 is 18.6 mph (30 km/h). The gearbox itself is not on record yet.

Transmission — 6388 Transmission
Drive	4WD
Forward gears	16
Reverse gears	8
Transmission as described	16 forward/8 reverse
Top speed forward	18.6 mph · 30 km/h
Top speed reverse	10.2 mph · 16.42 km/hhighest reverse speed printed in the article's speed tables
Steering	Hydraulic steering and adjustable steering wheel
Differential lock	Hydraulically operated differential lock
Front axle	Oscillating and extendable front axle

Source · Traktorenlexikon, “IHC 6388”

9 transmission values from Traktorenlexikon, “IHC 6388”.

Sources checked

14 SEP 2026

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

Traktorenlexikon: IHC 6388 — CC BY-SA 4.0, WIKIBOOKS-TL-119180 · revision 1037679. Wikibooks contributors (Traktorenlexikon). Original document