Eaton Fuller 18-speed
Deep reduction plus splitters on both ranges. Built for heavy haul, oversize and anything that has to creep. Overkill for a dry van and beloved by the people who need it.
Torque rating
1750-2250
pound-feet at the input
Weight
800 lb
160 lb over the lightest, which is payload
Shifting
By hand
the driver decides the gear
Maker
Eaton
What it does to fuel
Directionally best of the manuals for a skilled driver on varied terrain, because there is always a gear near the sweet spot.
What this type is
A driver, a clutch and a stick. Cheaper to buy, cheaper to fix, lighter, and increasingly hard to sell: the used market for manuals has thinned as fleets standardised on automated boxes and as fewer drivers can shift one.
Known issues
Weight, complexity, and a shift pattern that separates drivers who know it from drivers who claim to.
Verdict
The right gearbox for heavy and oversize work. On flat linehaul it is 80 pounds of payload and a lot of shifting you will not use.