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Toyota Land Cruiser FJ40
4-speed, 1975–80

Factory gearing, tires, angles and brakes for the Land Cruiser FJ40, and what the usual upgrades do to it. Every number is from the maker's own figures unless the calculators say otherwise. A few figures here are still waiting on a factory document; the calculators mark them.

Use this truck in the calculators
90 in wheelbase · 27.8 in front · 28.3 in rear overhang
in
Axle ratio3.7–4.11Factory, by trim
Crawl ratio28.6:1Best trim: 1975-78 (4.11 axles) (H78-15 4-ply tires)
Angles44 · 27 · 35°Approach, breakover, departure
Clearance7.9 inFactory figure
Highway mpg10Estimate, not EPA rated

Trims

2 we have figures for
TrimTireTransmissionAxleAnglesClearanceOpen
1975-78 (4.11 axles) (H78-15 4-ply tires)28.34-speed manual4.1144 · 27 · 357.9 inUse →
1979-80 (3.70 axles) (H78-15 4-ply tires)28.34-speed manual3.744 · 27 · 357.9 inUse →

Size

Wheelbase
90 in
Front overhang
27.8 in
Rear overhang
28.3 in
Height
71 in
Body
Short wheelbase SUV
Stock tires
28.3

Transmissions and low range

4-speed manual (H42)
3.555 · 2.292 · 1.41 · 1
Low range, tc4spd
1.959:1

Axles

Front
Toyota closed-knuckle solid front axle (full-floating, Birfield)
Rear
Toyota semi-floating rear axle
3.7 ratio
1979-80 (3.70 axles) (H78-15 4-ply tires)
4.11 ratio
1975-78 (4.11 axles) (H78-15 4-ply tires)
Ratios made for it
4.56 · 4.88

Brakes

Front rotor
11.89 in, 302 mm
Front caliper piston
42.7 mm
Rear drum
11.40 in, 290 mm
Rear
drum

Suspension

Front
solid axle on leaf springs
Rear
leaf springs, solid axle
Rear layout
Leaf springs

Fuel economy

Highway, not EPA rated
about 10 mpg
Where it comes from
Owner average, 3 trucks, mixed driving (1978 FJ40 2F 4.2 six, 4-speed)

Aftermarket bumpers

4 listed

Makers almost never publish angles, bottom heights or how far a bumper tucks, so these fill in as owners measure them. Measured yours? Add it on the rig page and every owner of this Land Cruiser FJ40 sees how it does on their tires and lift.

Front 3

Rear 1

Every calculator, set up for the Land Cruiser FJ40

Tire sizeBigger tires: speedo, clearance, angles and brakes.Compare tiresRegearHighway RPM on every ratio and mpg.Pick your gearsCrawl ratioHow slow it creeps, against other trucks.Work out crawlSpeedometerWhat it really reads on new tires.Fix your speedoLinksAnti-squat and what a lift does to it.Check your linksYour rigBuild sheet and measured angles.Start a build sheetLeaderboardsWhere the Land Cruiser FJ40 ranks against every stock truck.See where it ranks

Source: auto-brochures.com.

Use at your own risk. These calculators are here to help you plan and to inform your decisions, not to sign off on a build. Many numbers are estimates worked out from factory figures, and some factory figures are not yet confirmed. Check every number against your own truck, its manuals and a qualified shop before you buy parts, cut, weld, lift, regear or drive on it. Long Range Desert Tools is not liable for anything you do based on these calculators or their results. The full terms are in our policies.