Hi
Is it possible to change the rear diff pinion seal on a toyota hi lux diff with out dismantling it ? Ie can you drop the nut etc and pull it out ?
Never had that much of a diff apart .
Cheers
Chris
toy rear diff seal
Yes you can, if your only changing the seal? remember where the stake or the little mark on the nut is and when you fit the nut back on, use that mark to go up to. You sould have just a slight resistance in the rotation of the flange.I think its only about ( 5 inch pounds ) not tp be confused with foot pounds.
The net is full of wonderful things 
http://www.4x4wire.com/toyota/maintenance/front_end/teardown/
The hub is full of grease, the axle full of oil. You're right, the inner axle seal - all $4 of it is responsible for the leaks out of 99% of all Hilux swivel housings. And to replace it you virtually need to tear down the whole hub - although there is a shortcut:
1. remove the caliper
2. remove the manual hub
3. remove the circlip on the axle stub
4. undo all the 10mm bolts holding the rear felt/rubber seal in place
5. undo the top steering arm and bottom kingpin nuts and remove/loosen them
6. pull the complete assembly off
7. pull the CV out
8. use a screwdriver or something to remove the old seal
9, use something a bit more sedate to install the new seal - make sure its the right way around (oh, the memories of the first time I did this are flooding back
)
10. re-assemble in the reverse order - making sure to pack the knuckle, CV and housing with grease. DON'T over-grease the manual hub - they don't like that and they don't release properly.
Oh, have LOTS of rags, and maybe a container to catch the oily greasy mess that will pour out of the hub if its got too bad.
Oh, and having just given you that shortcut... if its that bad you SHOULD just buy a rebuild kit and do the whole thing properly from scratch, as per the document above.
Hope that helps
Steve
http://www.4x4wire.com/toyota/maintenance/front_end/teardown/
The hub is full of grease, the axle full of oil. You're right, the inner axle seal - all $4 of it is responsible for the leaks out of 99% of all Hilux swivel housings. And to replace it you virtually need to tear down the whole hub - although there is a shortcut:
1. remove the caliper
2. remove the manual hub
3. remove the circlip on the axle stub
4. undo all the 10mm bolts holding the rear felt/rubber seal in place
5. undo the top steering arm and bottom kingpin nuts and remove/loosen them
6. pull the complete assembly off
7. pull the CV out
8. use a screwdriver or something to remove the old seal
9, use something a bit more sedate to install the new seal - make sure its the right way around (oh, the memories of the first time I did this are flooding back
)
10. re-assemble in the reverse order - making sure to pack the knuckle, CV and housing with grease. DON'T over-grease the manual hub - they don't like that and they don't release properly.
Oh, have LOTS of rags, and maybe a container to catch the oily greasy mess that will pour out of the hub if its got too bad.
Oh, and having just given you that shortcut... if its that bad you SHOULD just buy a rebuild kit and do the whole thing properly from scratch, as per the document above.
Hope that helps
Steve