Rough Country 505.20 4 Inch Lift Kit · Rear Springs Ford F-250 4WD (1977-1979)
- Front lift 4"
- Install 6 - 8 hours
Questions about fitment? Live chat or call 866-235-4715
Couldn't load pickup availability
- Free shippingMost orders $500+
- 30-day returnsSee policy
- Warranty supportWe work with the maker
Questions about fitment?
Talk to a TRU specialist
We’ll help you verify fitment before you buy.
Veteran-owned · Austin, Texas · Mon–Fri 9:30a–11:00a & 1:00p–5:30p CT
Important notes before you order
- Models with a dana 60 front axle require dana 60 steering block.
- (#6608) does not fit highboy models.
TRU specialist notes
From the Trucks R Us fitment and install team, beyond the manufacturer's information.
- Plan for a professional wheel alignment after installing any lift or leveling kit.
- Going to bigger tires as well? Speedometer recalibration may be needed, and some tire and wheel combinations need trimming. Check the recommended wheels and tires, or ask us before you order.
Specifications
| Brand | Rough Country |
|---|---|
| Part number | 505.20 |
| UPC / GTIN | 8430301274660 |
| Front Lift Height | 4" |
| Front | Lifted leaf springs Dana 44 steering block U-bolts Hardware |
| Rear | Lifted leaf springs U-bolts Hardware |
| Install time | 6 - 8 hours |
| Weight (lbs) | 334.60lbs |
| Country of Origin | IN |
| Warranty | Manufacturer’s Warranty Statement |
What's in the box
| Qty | Part | Description |
|---|---|---|
| — | — | Front: Lifted leaf springs Dana 44 steering block U-bolts Hardware |
| — | — | Rear: Lifted leaf springs U-bolts Hardware |
Features
- Easy bolt-on installation increased ground clearance
Fitment
| Years | Vehicle |
|---|---|
| 1977-1978 | Ford F-250 4WD: Base, Northland |
| 1977-1979 | Ford F-250 4WD: Custom, Ranger, Ranger XLT |
| 1978-1979 | Ford F-250 4WD: Ranger Lariat |
| 1977 | Ford F-250 4WD: XLT |
Use the fit check above with your truck selected, or ask a specialist if your trim isn't listed.
Recommended wheels & tires
48 tire and wheel combinations from Rough Country. Pick a wheel size to narrow the list.
| Tire | Wheel | Bolt Pattern | Offset | Note |
|---|---|---|---|---|
| 35x12.50R18 | Factory 18 | 8x6.5/8x165.1 | – | – |
| 35x12.50R17 | Factory 17 | 8x6.5/8x165.1 | – | – |
| 35x12.50R16 | Factory 16 | 8x6.5/8x165.1 | – | – |
| 35x12.50R17 | 17x8.5 | 8x6.5/8x165.1 | +0 | – |
| 35x12.50R17 | 17x8.5 | 8x6.5/8x165.1 | +1 | – |
| 35x12.50R17 | 17x9 | 8x6.5/8x165.1 | -12 | – |
| 315/70R17 | 17x9 | 8x6.5/8x165.1 | -12 | – |
| 35x12.50R17 | 17x9 | 8x6.5/8x165.1 | +0 | – |
| 315/70R17 | 17x9 | 8x6.5/8x165.1 | +0 | – |
| 35x12.50R17 | 17x9 | 8x6.5/8x165.1 | +1 | – |
| 315/70R17 | 17x9 | 8x6.5/8x165.1 | +1 | – |
| 35x12.50R18 | 18x8.5 | 8x6.5/8x165.1 | +0 | – |
| 295/70R18 | 18x8.5 | 8x6.5/8x165.1 | +0 | – |
| 35x12.50R18 | 18x8.5 | 8x6.5/8x165.1 | +1 | – |
| 295/70R18 | 18x8.5 | 8x6.5/8x165.1 | +1 | – |
| 35x12.50R18 | 18x9 | 8x6.5/8x165.1 | -12 | – |
| 295/70R18 | 18x9 | 8x6.5/8x165.1 | -12 | – |
| 285/75R18 | 18x9 | 8x6.5/8x165.1 | -12 | – |
| 35x12.50R18 | 18x9 | 8x6.5/8x165.1 | +0 | – |
| 295/70R18 | 18x9 | 8x6.5/8x165.1 | +0 | – |
| 35x12.50R18 | 18x9 | 8x6.5/8x165.1 | +1 | – |
| 295/70R18 | 18x9 | 8x6.5/8x165.1 | +1 | – |
| 35x12.50R18 | 18x10 | 8x6.5/8x165.1 | -25 | – |
| 295/70R18 | 18x10 | 8x6.5/8x165.1 | -25 | – |
| 35x12.50R18 | 18x10 | 8x6.5/8x165.1 | -19 | – |
| 295/70R18 | 18x10 | 8x6.5/8x165.1 | -19 | – |
| 35x12.50R18 | 18x10 | 8x6.5/8x165.1 | -18 | – |
| 295/70R18 | 18x10 | 8x6.5/8x165.1 | -18 | – |
| 35x12.50R20 | 20x9 | 8x6.5/8x165.1 | -12 | – |
| 35x11.50R20 | 20x9 | 8x6.5/8x165.1 | -12 | – |
| 295/65R20 | 20x9 | 8x6.5/8x165.1 | -12 | – |
| 295/60R20 | 20x9 | 8x6.5/8x165.1 | -12 | – |
| 35x12.50R20 | 20x9 | 8x6.5/8x165.1 | +0 | – |
| 295/60R20 | 20x9 | 8x6.5/8x165.1 | +0 | – |
| 35x12.50R20 | 20x9 | 8x6.5/8x165.1 | +1 | – |
| 295/60R20 | 20x9 | 8x6.5/8x165.1 | +1 | – |
| 35x12.50R20 | 20x10 | 8x6.5/8x165.1 | -25 | Minor Trimming |
| 35x12.50R20 | 20x10 | 8x6.5/8x165.1 | -19 | Minor Trimming |
| 295/60R20 | 20x10 | 8x6.5/8x165.1 | -19 | Minor Trimming |
| 35x12.50R20 | 20x10 | 8x6.5/8x165.1 | -18 | Minor Trimming |
| 295/60R20 | 20x10 | 8x6.5/8x165.1 | -18 | Minor Trimming |
| 35x12.50R20 | 20x12 | 8x6.5/8x165.1 | -44 | Trimming Required |
| 35x12.50R22 | 22x10 | 8x6.5/8x165.1 | -25 | Minor Trimming |
| 35x12.50R22 | 22x10 | 8x6.5/8x165.1 | -19 | Minor Trimming |
| 285/55R22 | 22x10 | 8x6.5/8x165.1 | -19 | – |
| 35x12.50R22 | 22x10 | 8x6.5/8x165.1 | -18 | Minor Trimming |
| 285/55R22 | 22x10 | 8x6.5/8x165.1 | -18 | – |
| 35x12.50R22 | 22x12 | 8x6.5/8x165.1 | -44 | Trimming Required |
Installation
- Estimated install time6 - 8 hours
Free install support from the Trucks R Us tech team, for you or your shop.
Overview
Give your 77-79 Ford Super Duty an impressive upgrade, front to back with Rough Country’s 4" Ford Suspension Lift Kit! This easy-to-install lift kit raises increases your ground clearance to avoid any obstacles and provides a better-than-stock look that gives an improved ride height and more aggressive appearance. This kit features a set of front and rear, lifted leaf springs allowing you gain additional ride height without sacrificing ride quality or performance. A raised steering block and all necessary hardware is provided to keep everything at optimum angles for a factory-like ride, even after lifting. A set of Rough Country's premium N3 shocks are also included. These fine tuned 10-stage variable high-pressure Nitrogen charged shocks offer a fantastic blend of off-road action and smooth highway ride quality. With a durable 18mm spring-loaded piston rod and faster-cooling 54mm shock body. Rough Country's 4" Ford Suspension Lift Kit comes with everything you need to fit up to a 35" tire with proper wheel backspacing. Best of all, Rough Country's 4” Ford Suspension Lift Kit is backed by our Lifetime Replacement Warranty.
Questions
Will this fit my truck?
Select your truck at the top of the page and the fit check will confirm it. If your exact trim is not listed, call 866-235-4715 or live chat and a fitment specialist will check it before you order.
Do you help with installation?
Yes. Our technical team helps you or your shop with installation and troubleshooting after delivery, on top of the manufacturer’s support.
What if the part has a problem?
We work the warranty claim with the manufacturer on your behalf, within the manufacturer’s warranty policy.
Can I return it?
Most items can be returned within 30 days. See our return policy for details.
Do I need an alignment after installing?
Yes. Any lift or leveling kit changes suspension geometry, so get a professional alignment after installation.
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About Rough Country
Rough Country is a leading manufacturer and distributor of off-road accessories and suspension systems. Built on a foundation of American values and rooted in Tennessee, we use our expertise of trucks, Jeeps, and UTVs to help people drive their passions... Shop all Rough Country