Toyota 4Runner
1984–85 solid axle

Factory gearing, tires, angles and brakes for the 4Runner, 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

103 in wheelbase · 30.8 in front · 40.8 in rear overhang

Axle ratio4.1Factory

Crawl ratio36.9:1Best trim: 1985 4Runner / SR5, 22R-E EFI, 5-speed (HR78-15 (1984 figure; 1985 size not confirmed) tires)

Angles37 · ~21.8 · 22.5°Approach, breakover, departure (~ estimated)

Clearance7.7 inFactory figure

Highway mpg20EPA, 19 with the manual

Trims

2 we have figures for

Trim	Tire	Transmission	Axle	Angles	Clearance	Open
1984 4Runner / SR5, 22R carbureted, 5-speed (HR78-15 tires)	28.3	5-speed manual	4.1	37 · ~21.8 · 22.5	7.7 in	Use →
1985 4Runner / SR5, 22R-E EFI, 5-speed (HR78-15 (1984 figure; 1985 size not confirmed) tires)	28.3	5-speed manual	4.1	37 · ~21.8 · 22.5	7.7 in	Use →

~ Estimated from the wheelbase and ground clearance. No maker has published it for this truck yet.

Size

Wheelbase: 103 in
Front overhang: 30.8 in
Rear overhang: 40.8 in
Height: 66 in
Body: SUV
Stock tires: 28.3

Transmissions and low range

5-speed manual (G52), carbureted 22R: 3.928 · 2.333 · 1.451 · 1 · 0.851
5-speed manual (W56), 22R-E: 3.954 · 2.141 · 1.384 · 1 · 0.85
Low range, rf1a: 2.276:1

Axles

Front: Toyota 8 in solid front axle (4-cylinder 8 in, closed knuckle, leaf springs)
Rear: Toyota 8 in solid rear
4.1 ratio: All trims
Ratios made for it: 4.56 · 4.88 · 5.29 · 5.71

Brakes

Front rotor: 11.89 in, 302 mm
Front caliper piston: 43.0 mm
Rear drum: 10.10 in, 257 mm
Rear: drum

Suspension

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

Fuel economy

EPA highway, automatic: 20 mpg
EPA highway, manual: 19 mpg
Rated years: 1984–1985, 4WD

Brake upgrades

What bigger tires need →

Vented rotor conversion (1981+ Land Cruiser vented rotors + 1986-95 IFS calipers)4-piston · $854LC Engineering complete kit (cross-drilled rotors, reman calipers, Hawk pads). Trail-Gear sells the vented rotor alone for $69.99 each.

Aftermarket bumpers

5 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 4Runner sees how it does on their tires and lift.

Front 4

ARB Deluxe Bumper 3414090$1,346 · winch ready
Coastal Offroad 1st Gen 4Runner/ Hilux Surf and 2nd Gen Pickup / Hilux High Clearance Front Bumper Kit$682 · winch ready
LCE Performance Tube Bumper | 1984-1985 Pickup & 4Runner$650 · winch ready
Trail Gear Rock Defense Front Bumper - (84-85) P/U & 4Runner 4wd$800 · winch ready

Rear 1

Trail Gear Rock Defense Rear Bumper | 1984-1989 4Runner$800

Every calculator, set up for the 4Runner

Tire sizeBigger tires: speedo, clearance, angles and brakes.Compare tires RegearHighway RPM on every ratio and mpg.Pick your gears Crawl ratioHow slow it creeps, against other trucks.Work out crawl SpeedometerWhat it really reads on new tires.Fix your speedo LinksAnti-squat and what a lift does to it.Check your links Your rigBuild sheet and measured angles.Start a build sheet LeaderboardsWhere the 4Runner ranks against every stock truck.See where it ranks

Source: archive.org.

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.

Toyota 4Runner1984–85 solid axle