Inner Wheel Bearing and Wheel Seal Applications for
1973-1981 GM 4x4s with Dana 44 Front Axles

Dan the Gear Man Tech® Chart:
The outer wheel bearings used on all 1973-1981 GM Dana 44 front axles are the same. For the wheel seal and inner wheel bearing, there are choices for 1977 and prior trucks depending upon the year and model of your 4x4. 1977 is the transition year where you could have either early or late bearing types. The two types ARE NOT interchangeable!

Inner Bearing 1973-1976 Blazer, Jimmy, K10, K15: use QU50577 Cup and QU50578 Bearing
Inner Bearing 1977 Blazer, Jimmy, K10, K15: Can be either QU50577/QU50578 OR QU50446/QU50412
Inner Bearing 1978-1980 Blazer, Jimmy, K10, K15: use QU50446 Cup and QU50412 Bearing
Wheel Seal: 1973-1980 Blazer, Jimmy, K10, K15: All use QU50091

Inner Bearing 1973-1976 K20, K25: use QU50568 Cup and QU50569 Bearing
Inner Bearing 1977 K20, K25: Can be either QU50568/QU50569 OR QU50446/QU50412
Inner Bearing 1978-1981 K20, K25: use QU50446 Cup and QU50412 Bearing
Wheel Seal: 1973-1976 K20, K25: All use QU50208
Wheel Seal: 1977 K20, K25: Can be either QU50208 OR QU50091
Wheel Seal: 1978-1981 K20, K25: All use QU50091