Lexus GX 470
2003–09

Factory gearing, tires, angles and brakes for the GX 470, 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 · 35.4 in front · 43.3 in rear overhang

Stock tire265/65R1730.6 in tall

Axle ratio3.727Factory

Crawl ratio33.7:1Best trim: GX 470 (rear air suspension, normal height)

Angles31 · ~22.1 · 25°Approach, breakover, departure (~ estimated)

Clearance8.3 inFactory figure

Highway mpg18EPA

Tire upgrades, worked out

GX 470 (rear air suspension, normal height), 3.727s, from 265/65R17

Tire	Height	Under the diffs	Speedo at 65	RPM at 65	Gears for daily	Open
265/70R17	31.6 in	+0.5 in	63 mph	1,845	Keep 3.727s	Open →
285/70R17	32.7 in	+1.1 in	61 mph	1,783	4.56	Open →
33x10.50R17	33.0 in	+1.2 in	60 mph	1,767	4.56	Open →
33x12.50R17	33.0 in	+1.2 in	60 mph	1,767	4.56	Open →
255/80R17	33.1 in	+1.2 in	60 mph	1,763	4.56	Open →
285/75R17	33.8 in	+1.6 in	59 mph	1,723	4.56	Open →
315/70R17	34.4 in	+1.9 in	58 mph	1,697	4.56	Open →
35x11.50R17	35.0 in	+2.2 in	57 mph	1,666	4.56	Open →
35x12.50R17	35.0 in	+2.2 in	57 mph	1,666	4.56	Open →
37x11.50R17	37.0 in	+3.2 in	54 mph	1,576	4.56	Open →
37x12.50R17	37.0 in	+3.2 in	54 mph	1,576	4.56	Open →

Stock turns 1,908 rpm at 65 in top gear. Flotation sizes are nominal; most measure a little short mounted.

Trims

2 we have figures for

Trim	Tire	Transmission	Axle	Angles	Clearance	Open
GX 470 (rear air suspension, normal height)	265/65R17	5-speed automatic	3.727	31 · ~22.1 · 25	8.3 in	Use →
GX 470, RAHC high setting	265/65R17	5-speed automatic	3.727	30 · ~22.1 · 29	8.3 in	Use →

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

Size

Wheelbase: 109.8 in
Front overhang: 35.4 in
Rear overhang: 43.3 in
Height: 74 in
Body: SUV
Stock tires: 265/65R17

Transmissions and low range

5-speed automatic (A750F): 3.52 · 2.042 · 1.4 · 1 · 0.716
Low range, gx470: 2.566:1

Axles

Front: Toyota 8 in reverse-rotation clamshell IFS
Rear: Toyota 8.2 in solid rear (shared with V8 4Runner)
3.727 ratio: All trims
Ratios made for it: 4.56 · 4.88 · 5.29

Brakes

Front rotor: 13.30 in, 338 mm
Front caliper piston: 45.3 mm
Rear rotor: 12.29 in, 312 mm
Rear: disc (ventilated, 1-piston 48 mm floating)

Suspension

Front: double wishbone IFS, coilovers
Rear: 4-link with panhard rod, rear air springs
Rear layout: Factory 4-link

Fuel economy

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

Aftermarket bumpers

12 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 GX 470 sees how it does on their tires and lift.

Front 6

Coastal Offroad Lexus GX470 High Clearance Front Bumper Kit115 lb · $778 · winch ready
Dissent Off-Road GX470 Modular Front Bumper$1,099 · winch ready
DV8 Offroad 03-09 Lexus GX 470 MTO Series Winch Front Bumper$1,300 · winch ready
Hefty Fabworks 2003 - 2009 Lexus GX470 Front Bumper - Aluminum59 lb · $2,245 · winch ready
LFD Off Road TrailSeries Front Winch Bumper - GX470$925 · winch ready
Metal Tech 4x4 GX470 Goblin 2 Front Bumper - Metal Tech 2003-09$1,600 · winch ready

Rear 6

Every calculator, set up for the GX 470

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 GX 470 ranks against every stock truck.See where it ranks

Source: new-cars.com. Toyota 8 in IFS front has a carrier break: 3.73 and down vs 3.91 and up, so going from the stock 3.727 to 4.30+ needs the larger-ratio front carrier.

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.

Lexus GX 4702003–09