The 76 cj should have came factory with either the 258 6cyl or the 304 v8, t150 3spd trans, dana20 tcase, dana30 front axle and AMC 20 rear axle.. The AMC 20 has a bad rap because of the two piece axle shafts, (the axle flange is hold on by a big nut at the end of the axle) the nut loosens and...