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Early Bronco Axle Specifications

Rear Axle Specifications
'66-'75, 28 spline, big bearing short side: 26 15/16"
long side: 29 1/4"
'66-'75 28 spline, small bearing short side: 27 1/8"
long side: 29 5/8"
'74-'75 28 spline, big bearing/small brakes short side: 27 1/4"
long side: 29 3/4"
'76- '77 28 spline, big bearing/big brakes short side: 27 3/16"
long side: 29 11/16"

Brake Specifications
66-75 small bearing 10 x 2.5
74-75 medium duty 10 x 2.5
66-77 large bearing 11 x 1.75
76-77 11 x 2.25

Rear Axle Bearings
Application Seal Bearing I.D. O.D.
69-78 Bronco 2780 and 2900lb 9568 rw-207-ccra 1.3780 2.8346
69-78 Bronco 2780 and 2900lb 9568 rw-207-ccra 1.3780 2.8346
69-77 Bronco 3300lb 51098 514003 1.5312 3.1496
Tapered Roller Bearing 3195 a-20 1.5625 3.1483

Front Axle Bearings
Application location Seal Bearing I.D. O.D.
'71-'79 Bronco inner 4250 a-37 1.7812 3.0625
outer N/A a-37 1.7812 3.0625
'69-'71 Bronco inner 4250 a-37
'66-'69 Bronco inner 442380 a-37

Axle Shaft Seals
71-77 Bronco 5131
66-71 Bronco (from 3/18) 480570
66 Bronco (to 3/17) 40652s




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