Yukon Chrysler 8.75" Steel Spool - 30 Spline
YUKYP FSC8.75-30
The Yukon Chrysler 8.75" Steel Full Spool is a heavy-duty carrier replacement designed to provide permanent 100% lockup between both axle shafts. By eliminating differential action entirely, a spool ensures equal torque delivery to both wheels at all times, making it an ideal choice for drag racing, mud racing, rock crawling, pulling, and dedicated off-road competition vehicles.
Manufactured from high-strength 8620 steel and heat-treated for maximum durability, this spool is engineered to handle high horsepower, aggressive launches, large tires, and extreme traction conditions. With no clutches, gears, springs, or locking mechanisms to fail, a spool provides the ultimate in drivetrain simplicity and strength.
Includes:
- Chrysler 8.75 inch steel full spool
- 30 spline configuration
- Direct carrier replacement design
- Accepts carrier bearing and race numbers LM104949 and LM104912
Specifications
- Brand: Yukon Gear & Axle
- Part Number: YP FSC8.75-30
- Product Type: Full spool
- Application: Chrysler 8.75 inch differential
- Spline Count: 30 spline
- Material: 8620 heat-treated steel
- Traction Type: Permanent 100% lockup
- Carrier Replacement: Yes
- Carrier Bearing Number: LM104949
- Carrier Race Number: LM104912
- Street Use: Not recommended
- Quantity: Sold individually
Fitment
|
Year |
Make |
Model |
|
1961-1973 |
Chrysler |
Imperial |
|
1961-1973 |
Chrysler |
New Yorker |
|
1964-1970 |
Dodge |
A100 Truck |
|
1971-1974 |
Dodge |
B100 Van |
|
1971-1974 |
Dodge |
B200 Van |
|
1970-1973 |
Dodge |
Challenger |
|
1966-1973 |
Dodge |
Charger |
|
1965-1973 |
Dodge |
Coronet |
|
1961-1973 |
Dodge |
Dart |
|
1965-1973 |
Dodge |
Monaco |
|
1961-1973 |
Dodge |
Polara |
|
1961-1973 |
Dodge |
D100 Series / D100 Pickup |
|
1961-1973 |
Dodge |
D200 Series / D200 Pickup |
|
1962-1968 |
Dodge |
D300 Series / D300 Pickup |
|
1960-1973 |
Dodge |
W100 Series / W100 Pickup |
|
1960-1973 |
Dodge |
W200 Series / W200 Pickup |
|
1964-1974 |
Plymouth |
Barracuda |
|
1963-1971 |
Plymouth |
Belvedere |
|
1970-1973 |
Plymouth |
Duster |
|
1961-1973 |
Plymouth |
Fury |
|
1967-1971 |
Plymouth |
GTX |
|
1968-1973 |
Plymouth |
Road Runner |
|
1965-1973 |
Plymouth |
Satellite |
Fitment Notes
- Fits Chrysler 8.75 inch differentials using 30 spline axle shafts
- Compatible with 741, 742, and 489 case housings
- Uses carrier bearing LM104949
- Uses carrier race LM104912
- Verify axle spline count and carrier configuration before ordering
Tech Insight
1. What does a full spool do?
A full spool permanently locks both axle shafts together, ensuring both wheels rotate at the same speed and receive equal torque at all times.
2. Is a spool stronger than a locker?
Yes. Because a spool contains no moving components, it is generally stronger than most locking differentials and is commonly used in racing and extreme off-road applications.
3. Can I drive a spool on the street?
No. Full spools are not recommended for street-driven vehicles because they eliminate differential action, causing tire scrub, increased tire wear, and difficult handling during turns.
4. What spline count does this spool fit?
This spool is designed specifically for 30 spline Chrysler 8.75 inch axle applications.
5. What Chrysler 8.75 cases does this fit?
This spool fits Chrysler 8.75 inch differentials using 741, 742, and 489 case housings.