Yukon Dana 44 Steel Spool - 30-Spline, 3.92 & Up
YUKYP FSD44-4-30UP
This Yukon 30-Spline steel spool for Dana 44 axles is designed to deliver maximum strength and full-time traction in off-road and performance applications. By replacing the factory differential, it permanently locks both axle shafts together, ensuring equal torque delivery to both wheels in all conditions.
Manufactured from high-quality steel and precision machined for durability, this spool is ideal for trail rigs, rock crawlers, and competition builds. It provides a simple, strong, and reliable solution for drivers who demand consistent traction in extreme terrain.
Includes:
- (1) Yukon 30-Spline Steel Spool for Dana 44 Axles - 3.92 & Up Gear Ratios
Specifications
- Manufacturer: Yukon
- P/N: YP FSD44-4-30UP
- Fits Dana 44 rear axles
- 30 spline axle compatibility
- Designed for 3.92 and up gear ratios
- Provides 100% traction to both wheels
- High-strength steel construction
- Precision machined for durability and fitment
- Designed for off-road and performance use
- Not recommended for street-driven vehicles
Fitment
| Make | Model | Year Range |
|---|---|---|
| Chevrolet | Blazer | 1969–1974 |
| Chevrolet | C10 Pickup | 1967–1968 |
| Chevrolet | Camaro | 1984–1994 |
| Chevrolet | G10 Van | 1967–1972 |
| Chevrolet | K10 Pickup | 1961–1974 |
| Chevrolet | K10 | 1975–1980 |
| Chevrolet | K10 Suburban | 1967–1980 |
| Chevrolet | K20 Pickup | 1962–1974 |
| Chevrolet | K20 | 1975–1980 |
| Chevrolet | K20 Suburban | 1967–1980 |
| Chevrolet | K30 Pickup | 1968–1974 |
| Chevrolet | K30 | 1977–1980 |
| Chevrolet | K5 Blazer | 1975–1980 |
| Chevrolet | Suburban | 1960–1966 |
| Dodge | Ram 2500 | 1994–2002 |
| Dodge | Ramcharger | 1974–1993 |
| Dodge | W100 Pickup | 1968–1974 |
| Dodge | W100 Series | 1960–1967 |
| Dodge | W100 | 1975–1989 |
| Dodge | W150 | 1977–1985 |
| Dodge | W200 Pickup | 1968–1974 |
| Dodge | W200 Series | 1960–1967 |
| Dodge | W200 | 1975–1980 |
| Dodge | W250 | 1981–1993 |
| Ford | Bronco | 1971–1979 |
| Ford | E-100 Econoline | 1969–1975 |
| Ford | E-150 Econoline | 1975–1979 |
| Ford | F-100 | 1953–1979 |
| Ford | F-150 | 1975–1979 |
| Ford | F-250 | 1959–1977 |
| Ford | F-350 | 1979 |
| GMC | C15/C1500 Pickup | 1967–1968 |
| GMC | G1500 | 1964–1966 |
| GMC | G15/G1500 Van | 1967–1972 |
| GMC | K15/K1500 Pickup | 1966–1974 |
| GMC | K15 | 1975–1978 |
| GMC | K15 Suburban | 1975–1978 |
| GMC | K15/K1500 Suburban | 1967–1980 |
| GMC | K1500 | 1979–1980 |
| GMC | K1500 Suburban | 1979–1980 |
| GMC | K25 | 1975–1978 |
| GMC | K25 Suburban | 1975–1978 |
| GMC | K25/K2500 Pickup | 1967–1974 |
| GMC | K25/K2500 Suburban | 1967–1980 |
| GMC | K2500 | 1979–1980 |
| GMC | K2500 Suburban | 1979–1980 |
| GMC | Suburban | 1960–1966 |
| International | Scout 800 | 1968–1971 |
| International | Scout II | 1971–1980 |
| Isuzu | Rodeo | 1993–1997 |
| Jeep | Cherokee | 1986–1993 |
| Jeep | CJ5 | 1960–1983 |
| Jeep | CJ6 | 1966–1975 |
| Jeep | CJ7 | 1986 |
| Jeep | Comanche | 1986–1992 |
| Jeep | Commando | 1966–1973 |
| Jeep | Grand Wagoneer | 1984–1993 |
| Jeep | J10 | 1974–1988 |
| Jeep | Scrambler | 1981–1986 |
| Jeep | Wagoneer | 1971–1990 |
| Jeep | Wrangler TJ | 1997–2006 |
Tech Insight
What does a spool do in a Dana 44 axle?
A spool replaces the factory differential carrier and permanently locks both axle shafts together. This ensures both tires receive equal torque at all times, providing maximum traction in off-road and racing applications.
What gear ratios does this Dana 44 spool fit?
This Yukon spool is designed for Dana 44 applications using 3.92 and numerically higher gear ratios, including 4.10, 4.56, 4.88, 5.13, and similar gear sets.
Is a spool stronger than a locker?
Yes. A spool contains no moving parts, clutches, or locking mechanisms. This simplicity makes it one of the strongest and most reliable traction devices available for competition and dedicated off-road vehicles.
Can I use a Dana 44 spool on the street?
A spool is generally not recommended for street-driven vehicles. Because both wheels are permanently locked together, tire scrub, increased tire wear, driveline stress, and reduced turning performance occur on pavement.
What vehicles commonly use a Dana 44 spool?
Dana 44 spools are commonly used in rock crawlers, trail rigs, mud trucks, drag cars, Ultra4 vehicles, and competition off-road builds where maximum traction and drivetrain simplicity are more important than street manners.