Description
The FOX® 985-24-149 is a 2.0 Performance Series smooth body remote reservoir rear shock with 13.6 inches of travel, built for 2017–2026 Ford F-250 and F-350 Super Duty trucks running 1.5″–3.5″ of rear lift.
IMPORTANT: This shock is application-specific to the rear position and the 1.5″–3.5″ lift range only. FOX® also lists a separate rear shock, part number 985-24-105, that covers earlier Super Duty model years (1999–2016) as well as F-450/F-550 chassis at different lift heights — confirm your truck’s model year before ordering to make sure you’re matching the correct generation. This unit ships with the black-anodized billet reservoir clamp included; no additional hardware is required for installation.
This is a bolt-on aluminum-bodied shock built around FOX®’s Performance Series platform, designed to deliver race-proven damping performance in a hassle-free direct-fit package. The 2.0″ impact-extruded 6061-T6 aluminum shock body is clear-anodized for corrosion resistance and dissipates heat faster than a comparable steel-body shock.
An external reservoir increases total oil and nitrogen capacity over a standard monotube design, improving damping consistency during extended off-road runs or heavy-load towing where the shock is working hardest. The reservoir mounting clamp and other components are CNC-machined from black-anodized 6061-T6 billet aluminum.
A race-developed high-flow damping piston is matched with application-specific valving tuned for the Super Duty platform, delivering predictable ride quality across rough and uneven terrain. The shaft is 5/8″ hard chrome-plated, heat-treated alloy steel, and sealing is handled by a redundant three-stage system — main seal, wiper seal, and scraper seal — for long service life. FOX® backs this shock with a Limited Lifetime Warranty.
- Rear application for 2017–2026 Ford F-250 and F-350 Super Duty, 1.5″–3.5″ lift
- 2.0″ impact-extruded 6061-T6 aluminum body, clear-anodized for corrosion resistance
- External reservoir for increased oil and nitrogen capacity
- Black-anodized, CNC-machined 6061-T6 billet aluminum components and reservoir clamp
- 5/8″ hard chrome-plated, heat-treated alloy steel shaft
- Race-developed high-flow piston with application-specific valving
- Redundant three-stage seal system: main seal, wiper seal, scraper seal
- Includes billet reservoir clamp — no additional hardware required
- FOX® Limited Lifetime Warranty
- Sold individually
| Part Number | 985-24-149 |
| Series | Performance |
| Position | Rear |
| Travel | 13.62 in |
| Body | 2.0″ impact-extruded 6061-T6 aluminum, clear-anodized |
| Components | Black-anodized, CNC-machined 6061-T6 billet aluminum |
| Shaft | 5/8″ hard chrome-plated, heat-treated alloy steel |
| Piston | Race-developed high-flow piston design |
| Valving | Application-specific |
| Seals | Redundant sealing pack: main seal, wiper seal, scraper seal |
| Extended Length | 33.52 in |
| Compressed Length | 19.9 in |
| Top Mount | Eyelet |
| Bottom Mount | Eyelet |
| What’s Included | Billet reservoir clamp |
| Warranty | FOX® Limited Lifetime Warranty |
| Sold As | Individually |
Covers the rear position on 2017–2026 Ford F-250 and F-350 Super Duty trucks running 1.5″–3.5″ of lift, per FOX®’s published application data. This includes 2017–2025 XL, XLT, Lariat, King Ranch, Limited, and Platinum trims and the 2026 model year.
This is not the correct shock for 1999–2016 Super Duty trucks or for F-450/F-550 chassis — those applications use FOX® part number 985-24-105 instead, which covers a wider range of lift heights depending on model and year.