Timken semi-floating rear axle was available in 4.88, 5.38,
and 6.17 ratios. Normally 11" x 2" drum brakes were
used. They do not have a differential cover, they split down
the middle of the differential, making them easy to identify.
The Timken 51540 was used in the Willys
Pickups between 1947-55.
This axle is considered light duty, so if you are considering
larger tires or a larger engine you may want to swap this