LRDT Long Range Desert ToolsLRDT
Apply

Ford F-250 Super Duty
1999–2004 4x4

Factory gearing, tires, angles and brakes for the F-250 Super Duty, 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
156.2 in wheelbase · 37.4 in front · 52.2 in rear overhang
in
Stock tireLT235/85R1631.7 in tall
Axle ratio3.73–4.3Factory, by trim
Crawl ratio67.7:1Best trim: F-250 4x4 (16 in)
Angles27.6 · 19.7 · 15.9°Approach, breakover, departure
Clearance8.3 inFactory figure
Highway mpg13Estimate, not EPA rated

Tire upgrades, worked out

F-250 4x4 (16 in), 3.73s, from LT235/85R16
TireHeightUnder the diffsSpeedo at 65RPM at 65Gears for dailyOpen
285/75R1632.8 in+0.6 in63 mph1,787Keep 3.73sOpen →
33x10.50R1633.0 in+0.6 in62 mph1,778Keep 3.73sOpen →
255/85R1633.1 in+0.7 in62 mph1,774Keep 3.73sOpen →
315/75R1634.6 in+1.4 in60 mph1,6964.1Open →
35x12.50R1635.0 in+1.6 in59 mph1,6764.1Open →

Stock turns 1,849 rpm at 65 in top gear. Flotation sizes are nominal; most measure a little short mounted.

Trims

2 we have figures for
TrimTireTransmissionAxleAnglesClearanceOpen
F-250 4x4 (16 in)LT235/85R166-speed manual, 4-speed automatic overdrive, 5-speed automatic3.73 / 4.1 / 4.327.6 · 19.7 · 15.98.3 inUse →
F-250 4x4 (LT265 option)LT265/75R166-speed manual, 4-speed automatic overdrive, 5-speed automatic3.73 / 4.1 / 4.327.6 · 19.7 · 15.98.3 inUse →

Size

Wheelbase
156.2 in
Front overhang
37.4 in
Rear overhang
52.2 in
Height
80 in
Body
Pickup
Stock tires
LT235/85R16, LT265/75R16

Transmissions and low range

6-speed manual (ZF S6-650)
5.79 · 3.3 · 2.1 · 1.31 · 1 · 0.72
4-speed automatic overdrive (4R100)
2.71 · 1.54 · 1 · 0.71
5-speed automatic (5R110W TorqShift)
3.11 · 2.2 · 1.54 · 1 · 0.71
Low range, np271
2.72:1

Axles

Front
Dana 60 solid front (leaf springs 1999-2004, coil springs 2005-07)
Rear
Sterling 10.25/10.5-in full-floating
3.73 ratio
F-250 4x4 (16 in), F-250 4x4 (LT265 option)
4.1 ratio
F-250 4x4 (16 in), F-250 4x4 (LT265 option)
4.3 ratio
F-250 4x4 (16 in), F-250 4x4 (LT265 option)

Brakes

Front rotor
13.03 in, 331 mm
Front caliper piston
54.0 mm
Rear rotor
12.83 in, 326 mm
Rear
disc (ventilated)

Suspension

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

Fuel economy

Highway, not EPA rated
about 13 mpg
Where it comes from
Owner average, 230 trucks, mixed driving (2002 F-250 Super Duty (mostly 7.3 Power Stroke 4R100; some 5.4 and V10))

Brake upgrades

What bigger tires need →

Aftermarket bumpers

17 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 F-250 Super Duty sees how it does on their tires and lift.

Front 10

Rear 7

Every calculator, set up for the F-250 Super Duty

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 F-250 Super Duty 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.