How-to: Replace a Diff Pinion Oil Seal
Replacing the diff pinion oil seal on a Rover axle is fairly straightforward, however removing the old oil
seal turned into a bit of a mission for me, which is where having a SII diff became an advantage.
First step is to remove the front prop. If you have free wheeling hubs you can disengage them to allow
you to turn the prop, else you can jack up a front wheel high enough to rotate freely and secure on axle
stands.
One by one remove the prop bolts. This can be difficult as there is not much room between the propshaft
yokes, however I have a wide angle prop which makes things a lot easier. You only need to disconnect
the diff side and can then use cable ties or twine to secure the prop out of the way.
Using 14mm socket and spanner to undo prop
The next challenge is to remove the split pin and undo the castle nut that holds the diff flange in place.
The castle nut will be very tight - to undo you will need to lower the front wheel back on the ground or
lock the FWH's. It may also be necessary to chock the wheels. If you still struggle to get the nut loose
you can use a long breaker bar (scaffolding pole) on the socket, prop it against the chassis/floor and
gently push the vehicle forward and it will come undone as if by magic. Thanks to Big Sandy for that
one!
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