Ford F-250
1973–79 4x4
Factory gearing, tires, angles and brakes for the F-250, 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.
Size
- Wheelbase
- 133 in
- Height
- 80 in
- Body
- Pickup
- Stock tires
- 30.0
Transmissions and low range
- 4-speed manual (New Process NP435, 6.69 low)
- 6.69 · 3.34 · 1.79 · 1
- 3-speed automatic (Cruise-O-Matic / SelectShift, C6)
- 2.46 · 1.46 · 1
- Low range, np205
- 1.96:1
- Low range, np203
- 2.01:1
Axles
- Front
- Dana 44 solid front axle
- Rear
- 5,300-lb-rated full-floating rear (Dana 60 class)
- 4.1 ratio
- All trims
Brakes
- Front rotor
- 12.56 in, 319 mm
- Front caliper piston
- 73.0 mm
- Rear drum
- 12.00 in, 305 mm
- Rear
- drum
Suspension
- Front
- 4x4: solid axle on leaf springs
- Rear
- leaf springs, solid axle
- Rear layout
- Leaf springs
Fuel economy
- Highway, not EPA rated
- about 11 mpg
- Where it comes from
- Owner average, mixed driving (1970s F-250 4x4 390 V8, 4-speed manual, 35in tires, no lift)
- Source
- ford-trucks.com
Aftermarket bumpers
5 listedMakers 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 sees how it does on their tires and lift.
Front 3
Every calculator, set up for the F-250
Source: oldcarbrochures.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.