Symptoms
Hubs that won't engage, pop out in four-wheel drive, or let the front driveshaft spin in two-wheel drive.
The fix, step by step
- With the truck on stands, remove the hub cover bolts and pull the old hub body and inner drive gear.
- Clean the hub and spindle area, check the bearings while it's apart, and install the new hub with the gasket and hardware supplied.
- Test both positions by hand, then on a slippery surface.
- Offroad Design sells Yukon Hardcore hubs for 1978-and-older GM Dana 44s (19-spline).
- Confirm the spline count on yours first.
Tools & part numbers
- Hex or socket bits
- snap-ring pliers
- grease
- torque wrench
Where to buy the parts
Yukon Hardcore locking hub set, '78 and older Dana 44, GM & Ford, 19-splineOffroad Design ↗Amazon ↗
Hunting a used or discontinued part? Search eBay Motors for Chevrolet K5 Blazer (1st generation) parts →
Rated for a competent home mechanic with a decent tool kit. Confirm torque figures, fluids and procedures against the factory service manual for your VIN, support the truck on stands rather than a jack, and work at your own risk (disclaimer). Some parts links are affiliate links, which pay us a small commission at no cost to you.