Sin duda Dana 27A
http://www.ifsja.org/tech/figures/db.shtml
AXLES
Front Axles
Model / Year / Availability
D-27A / 1962-70 / Wagoneer
D-30 / 1971-73 / Wagoneer
D-44 / 1962-88 / All J-Trucks, 1974-92 Wagoneer/Cherokee/Grand Wagoneer
D-44 w/vacuum / 1983-84 / All except J-20 With Type 1 NP 229 or NP 228 transfer case disconnect
Rear Axles
Model / Year / Availability
D-44 / 1962-79 / All except X,Y,Z series trucks and J-20
D-44 / 1986-92 / All except J-20 From late 1986
D-53 / 1962-68 / X,Y series trucks only Semi-floating axle
D-60-2 / 1969-73 / Trucks only Semi-floating axle
D-60 / 1969-88 / Z series trucks Full-floating axle J-20 only
D-70 / 1962-68 / Z series trucks only Full-floating axle
AMC 20 / 1980-86 / All except J-20 Through early 1986
Saludos,
Mario