Toyota 4Runner
4th gen, 2003–09

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

109.8 in wheelbase · 35.8 in front · 42.5 in rear overhang

Stock tireP265/70R1630.6 in tall

Axle ratio3.727–3.909Factory, by trim

Crawl ratio33.7:1Best trim: SR5 4WD V6

Angles32 · 22 · 24°Approach, breakover, departure

Clearance9.1 inFactory figure

Highway mpg18EPA

Tire upgrades, worked out

SR5 4WD V6 (2003-04, 4-speed), 3.909s, from P265/70R16

Tire	Height	Under the diffs	Speedo at 65	RPM at 65	Gears for daily	Open
265/75R16	31.6 in	+0.5 in	63 mph	1,902	Keep 3.909s	Open →
285/75R16	32.8 in	+1.1 in	61 mph	1,834	4.56	Open →
33x10.50R16	33.0 in	+1.2 in	60 mph	1,825	4.56	Open →
255/85R16	33.1 in	+1.2 in	60 mph	1,821	4.56	Open →
315/75R16	34.6 in	+2.0 in	57 mph	1,740	4.56	Open →
35x12.50R16	35.0 in	+2.2 in	57 mph	1,720	4.56	Open →

Stock turns 1,967 rpm at 65 in top gear. Flotation sizes are nominal; most measure a little short mounted.

Trims

5 we have figures for

Trim	Tire	Transmission	Axle	Angles	Clearance	Open
SR5 4WD V6 (2003-04, 4-speed)	P265/70R16	4-speed automatic	3.909	32 · 22 · 24	9.1 in	Use →
SR5 4WD V6	P265/70R16	5-speed automatic	3.727	30 · 22 · 26	9.1 in	Use →
SR5 4WD V6 w/ 17 in option	P265/65R17	5-speed automatic	3.727	30 · 22 · 26	9.1 in	Use →
Sport Edition 4WD V6	P265/65R17	5-speed automatic	3.727	30 · 22 · 26	9.1 in	Use →
Limited 4WD V6	P265/60R18	5-speed automatic	3.727	30 · 22 · 26	9.1 in	Use →

Size

Wheelbase: 109.8 in
Front overhang: 35.8 in
Rear overhang: 42.5 in
Height: 70 in
Body: SUV
Stock tires: P265/60R18, P265/65R17, P265/70R16

Transmissions and low range

5-speed automatic (A750F); V6 2005-2009 (2003-2004 V6 used a 4-speed auto, ratios not sourced): 3.52 · 2.042 · 1.4 · 1 · 0.716
4-speed automatic (2003-04): 2.804 · 1.531 · 1 · 0.705
Low range, part-time: 2.566:1

Axles

Front: Toyota 8 in reverse-rotation clamshell IFS
Rear: Toyota 8.2 in solid rear
3.727 ratio: SR5 4WD V6, SR5 4WD V6 w/ 17 in option, Sport Edition 4WD V6, Limited 4WD V6
3.909 ratio: SR5 4WD V6 (2003-04, 4-speed)
Ratios made for it: 4.56 · 4.88 · 5.29

Brakes

Front rotor: 12.60 in, 320 mm
Front caliper piston: 45.3 mm
Rear rotor: 12.30 in, 312 mm
Rear: disc (ventilated)

Suspension

Front: double wishbone IFS, coilovers
Rear: 4-link with panhard rod, coil springs; rear air optional on Limited
Rear layout: Factory 4-link

Fuel economy

EPA highway: 18 mpg
Rated years: 2003–2009, 4WD

Brake upgrades

What bigger tires need →

5th gen 4Runner front brake swap (14WA calipers + 338 x 31.8 mm rotors)+20% brake torque12.6 → 13.3 in rotor · 4-piston · 17 in wheels or bigger
StopTech TR340.6TA 6-piston front big brake kit+7% brake torque12.6 → 13.4 in rotor · 6-piston · 17 in wheels or bigger · $2,300
13WH / GX470 / 4Runner Sport 13.3 in front swap+7% brake torque12.6 → 13.3 in rotor · 4-piston · 17 in wheels or bigger

Aftermarket bumpers

8 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 6

ARB Combination Bumper 3421540B$1,946 · winch ready
C4 Fabrication 4Runner Overland Series Front Bumper / 4th Gen / 2003-2009$1,798 · winch ready
Coastal Offroad 4th Gen 4Runner / Hilux Surf High Clearance Front Bumper Kit110 lb · $778 · winch ready
Hefty Fabworks 2003 - 2009 4Runner Front Bumper - Steel$2,095 · winch ready
Iron Bull Bumpers 2006-2009 Toyota 4Runner Front Bumper$1,700 · winch ready
LFD Off Road TrailSeries Front Winch Bumper - 4th Gen 4Runner$925 · winch ready

Rear 2

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: top4runners.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.

Toyota 4Runner4th gen, 2003–09